2a3 vs 300b. 5V plate(as the globe 300B 2.

2a3 vs 300b Palmer. 5 watts so the amp you are looking at has to be push pull. The 2A3 is a little more detailed and refined, so it depends on what you like. I listen to jazz in a 14x25 room room at moderate levels. When a pair of his 2A3 monos Obviously, between 2A3 and 300b. New & NOS power tubes from Electro-Harmonix, Genalex, JJ & other US made tubes! Email Password Confirm Password I have heard the 300b and the 2a3 tubes in some audionote amps, But they were parallel 300bs vs a 2a3 amp. PLEASE NOTE: TUBES ARE NOT INCLUDED WITH THE TU-8900 KITS. The 2A3 tube is a very nice sounding tube but I would probably pic the 300B amp if you are unable to listen to both of them. Just use this as the label (R-click the label). I own, and like very much, my parallel 2a3 amp. If I may, my suggestion is to hold on to the Dared 300B SET you like so much, The 2A3 and 300B are both triodesbut do sound very different from one another. My argument for stating all boutique 300B tubes are nice based on many reviews over many years, flavors described, but don't recall a single review stating any of The AN kit is more expensive than the Decare when comparing 300B amps to 300B amps. However, since their filament voltage and the operating points are totally different, the supply voltage needs to be adjusted when using these 2 tubes in a same amp. 2A3-01 single ended output transformers: using the vintage winding Elekit TU-8900 300B/2A3 I'm very impress with the specs reading on tube compliment with the "12au7 / 12BH7", frequency response and output impedance. Prior to your post I If you're "tube curious," how do you make sense of the options? Should you get a single-ended or push-pull tube amp? This video features two tube amplifiers: As the only one modern audio vacuum tube which with retro-onion glass shell styling (Acme 300B, 274B, 2a3, etc. Then there is the 2a3 which to me is a bit of a middle ground between 300B and the 211 - at least with Audio Note. To map Linlai's E-300B by direct comparison, I had 300B from Electro-Harmonix, Elrog's non-molybdenum plate and year 2006 Western Electric. mkane, Sep 19, 2022 #12. While researching that amp, I could not ignore the posts that kept popping up about Aric's Super 6sN7 pre-amp and if money is no object, his Motherload pre-amp. I will be building mine in 300b form to run the bottom end of my tri-amp setup now being powered by a modified paramour II. Among the most common low-powered triode tube types--the 300B, 2a3, and the 45, I personally like the sound of the 45. 2A3 vs. 2A3 s OK as I m hopelessly addicted to valves/tubes, now I m looking at SE kits fancy something a bit different, get some fun and experience with the soldering iron. Discussion in 'Audio Hardware' started by Classic Car Guy, May 8, 2020. Theme - Light; YYYY-MM-DD / 12-hour clock Tim san are doing brew 2A3/300B compatible Single Ended Amplifier from later 2011 past KT88 single ended amplifier built. 5 watts output. Besides power, is there much of a sonic difference between the 805 and the 845? What I'm told to expect is less "hifi" sound, more or less, and an increase in "naturalness. I ordered a bee-pre and paramount kit on black monday. 2A3 JJ is actally 300B . (i. It will work with all 2A3 amplifiers. I am new in this forum, ahead of time thanks. It went well beyond the speakers. This is the photo of the amp. Mentor SET 300B/2a3 Power Amplifier. Not so much a matter of getting what you pay for since the A-Vs were salvage but of 'buyer beware'. As you can see from the title I m thinking about these 2 classic output tubes, but I A detailed schematic and description of the two preassembled PMJ8900 boards that control the 2A3/300B auto-detect, the soft-start, and overcurrent protection would be great. btw - right now I'm working on a build for some globe 46's. When I was designing the power supply, I knew I wouldn't get to a B+ of 350VDC with that tube, so I went with 5AR4 instead. i also have several 300b amps and integrated The 2A3 and 300B should both be able to nicely drive a UBT-3. Now, I have an AN The e-mailer was Ian Large. My question is; what’s the difference between the EH tubes and the Gold Lion? They look identical from the outside. As we are the UK distributor for Shuguang Audio, would you be interested in reviewing the Treasure Series valves? We have 300B, 2A3, KT66, KT88, 2A3 vs 300B: - Update Feb 23, 2022: I recently learnt that the Cossor BlackPlate 300B is not a very competitive tube. It offers power tubes rolling (300B / 2A3), possibility to use 12BH7A instead of 12AU7 (ECC82), selectable headphone impedance / volume level, possibility to switch to non 300B vs. The 300b can be used in more systems. 255. The 45 are magic. Very open, a bit bright in some instances, more lively than I was expecting. The 2A3, 300b, and 211 won't yield the power minimum I want - or am I missing something. The 300B tube is considerably more powerful than the 45 or 2A3, for example, and this has helped it remain relevant and at least somewhat versatile, even as average speaker sensitivity has gradually decreased over the decades. Rachel's 2A3/101D samples would 2a3と300bはなにが違うのかな？2a3も300bも同じような形をしていて、300bのアンプはたくさん売られています。アンプキットを作っている会社では I wanted to talk about the DHT 1st developed in the 30's and considered by many the only device suitable for audio ? . Audio Note Primary 2. The glass enclosure was from the princess tube for its unmatched sonic beauty. so he said "would like to brew 2A3/300B Single Ended Amplifier. That does not preclude a "house sound" though. Audion Silver Night Anniversary DUO 300B/2A3 switchable hard wired stereo or stereo integrated power amplifier is from our intermediate level range which uses the Many manufacturers are producing 300B and 2A3 tubes so users can enjoy trying the various versions available in the market. I've read the JJs are more of a 300B in drag than a traditional 2A3, and I'm wondering if anyone can explain the differences between the JJ Automatic detection of 300B and 2A3 tubes “300B” and “2A3” tubes are similar in the appearance. I actually dislike the 300B sound. Comments are appreciated on the sound of a 2a3 vs a 300b and the suitablilty of these amps for my listening situation. 5A and the 300B being 5. The 2A3 vacuum tube is a power triode capable of outputting 3. 5 W in a single-ended Class A configuration. Let's assume that we have 200V available for A-K of 2A3, so with 1:1 interstage transformer we can merry them perfectly. The slightly leaner sound of the 2a3 (vs. prpbably some amplifier 2A3 Class A Single Ended has 5 The short list is a Welbourn 300b or a Wright Sound Labs 2A3 or 300b amp. I used Tamura F-5002 transformers in my commercial 300B SE amplifier line - flat out the best of several I have worked with. Consider the Cayin A-300B integrated amp, made by Spark (aka Zhuhai Spark) The Cayin's way with sonic details was just a bit off by comparison—and not quite as good as a typical 2A3-based SET. Hello, to all the forum. Good 300B tubes seem expensive, 2A3 not nearly as spendy. The "syrupy" sound of the amp you tried could be the result of the transformer coupling, the choice of 300B tube or both. ) I have two sets of these wonderful-sounding monoblocks ( 3. SE Amplifier vs PSE Amplifier - 300B & 2A3 Sound Demo - Are more tubes better?Tested with the best fullrange speakers by Cube Audio - Jazzon www. These old beauties will get DC heaters, but the reason is not to reduce hum or intermodulation distortion. 300B) sounds good with Audio Note speakers. The choice of 300B tube believe it not also depends on the load on the primary for the OPT. comMusic:Third Attempt – The Novel Soun I own the JJ 2A3-40 also and in my opinion they are a superb tube. Audion Silver Night Anniversary DUO 300B/2A3 switchable hard wired stereo or stereo integrated power amplifier is from our intermediate level range which uses the well known 300B tubes or switchable to 2A3. L1 EL84 V2 Integrated* L4 EL84 Integrated @david_ten I've heard this claim a number of times, not my experience, various driver tubes in two 845SET, one 2a3 and 300B, I've always heard difference between output tubes, easy to hear. A bit cheesy, but it could be just this easy. Attachments. it looks so sexy. I wanted to compare the assembled Elekit TU-8900 to my assembled ANK Kit 1 and hear the difference between 300B tubes and 2A3 tubes, and to hear which amp sounded better. Both calculate to 6. 5K and 5K primary Tango FW-50 OPT . The TU8900 amp's unique circuit automatically detects the triode tube installed, without any bias adjustment or settings changed by the user. JPG. 8k), so never heard either of the amps It can be quickly seen from the 300B working points at 250V / 60mA / 2700 Ohms, that the output power is approximately 0. and despite what people have said, both will EASILY pressurize your room. Audion Silver Night DUO switchable 300B/2A3 power amplifier. Actually I prefer it as is. A handful of manufacturers like KR get very close, but there are other issues (poor support) with them. I agree that FFT bin width is definitely something to consider when performing measurements. All of these amps come highly recommemnded. Why some people say don't use SS power amp with The 2a3 is a nice tube for sure, but it lacks the detail and clarity of a 45, there is also very little volume increase by gaining a watt or so: better to gain volume by getting more efficient speakers. Their supply voltages need to be adjusted depending on which of these tubes are used in the same amp. However, there’s a tradeoff involved when you replace a 300B with a 2A3 and vice-versa. I have new units for sale. (DIY Audio) We test on 2A3 first. Sound wise, as I posted in "300B lover" thread, 45 is the most balanced DH power triode. 2. We have to say, this is so at 2700 Ohms load, whereas the RCA 2A3 working point is at 2500 Ohms load. The eight watts are nice but unnecessary with high effeciency horns IMHO and here is why: Tubes. The TJ's sound good, but they ain't a military 2A3 The 2A3 and 300B are both triodesbut do sound very different from one another. 5V with 2500 Ohms vs 2700 As for filament requirements, there's really no difference between the 2A3 and the 300B the 2A3 being 2. P4000425. this is my first project building a tube amp and it happened to be a 300B ( How insane I am using a 300B as first step !) So, for the drivers I am using the Brimar CV1985 a equiv of 6SL7. Index Introduction Components The main schematic Power supply for stereo version Digital Input stage Sonic results Layout views Layout size My address; Introduction This project born to test the 2A3 tubes and I have created a reference amplifier better than the previous with 300B. The higher bias voltage and filament current make those impractical. I have Set Utopia Audio and love the 45 and 2A3, The 2A3 is excellent very balanced in all range bass, middle and louds 300B is excellent in middle and bass, with body and presence . I have a home built single ended stereo 300b powered amp that I built about 10 years ago using the EH gold 300b’s. ” I am torn between 45, 2a3, and 300b as my preferred tube. Can someone explain general sonic differences between the EL34, KT88, 300B, 2A3, 805, 845 in SET and PP configurations in terms of bass, midrange, highs, tonality, sound stage, dynamics, resolution, imaging, harmonics, etc. sister model RL-300XM spec https://youtu. Tamura F-2007 After the first round we concluded the "sound of the core" made the difference. The Luxman (no These tubes get close, do a good job mimicking say a 2A3, but are never quite there. 5K (2A3-01/2A3-03) or 2. I have 3 different tube amps (45,2A3,300B) and use them in different applications. The goal actually was to let the buyer choose between a 2A3 and 300B tube version but in the end, only the 2A3 version saw the daylight. 5V plate(as the globe 300B 2. The 45, 2A3, and 300B, in that order generally grade out at the top of the more widely implemented types, though an obviously less sympathetic loudspeaker requires those larger tubes. I am looking for a lush warm sound with a big sound stage and great imaging. e Among the common low-powered triodes with similar requirement—2a3,45, 300b—I generally prefer the 45, but it’s output is puny. Don’t get me wrong; both the Linlai E-300B and the Psvane ACME 300B render rich, well-balanced presentations, and if I were not making conscious A to B comparisons, – 2A3 (1) – 211 all types (3) – 274B (3) – 300B all types (17) – 50 tube (1) – 6CA7/EL34 all types (9) – 6SL7 / 6N9P (1) – 6SN7 / CV181 (14) Tom Jones Detroit CityThanks for your patience Mr. (Henry Mancini & Montivani & Robert Plant) I would say I get 6 to 7 watts per channel. I guess one could only give an appropiate answer if they owned the Wavelegth's and compared different 2a3 tubes with it. These two tubes, similar in appearance but very different in characteristics, can both be used in TU-8900 without any LOL. If you choose small Triode stick with the 300B(more power and better sound). The US seems to offer the best prices. This new tube is using the same 300B 2. I love my 300b amp, but often find myself missing the sound of the 45s whenever I have it in rotation. I didn't find this quality pleasing because I listen to a lot of cello, either solo or duet with piano. As the name suggests this power amp from Elekit supports both the 300B and 2A3 tubes in a single-ended tube amp kit. 0VAC@1. Location: Germany. If say we bias 300B at 350V A-K, 80 mA, -70V on G1, we need like 150V minimum P-P swing on it's grid. Based roughly on the shape and size of the classic Quad monoblocks of the 60’s, Tube Fantasy builds a variety of push pull and single ended circuits using 300B, 2A3, 6L6, and even some outliers like the F2a. So does anyone prefer the Triode over Pentode ' i have owned both and prefer the triode sound , in my case the 2A3 but having heard a top notch 300B (Art Audio Diavolo with MB border patrol bi amped , and also a Kondo 845 amp and the 811 I have read with interest many reviews of 300B tubes and the Linlai are intriguing. 5V) with stronger plate structure learned from making the original princess tubes. My first triode amp was the parafeed 300B SET that I have. 45 is wonderful with solo instruments and especially female vocals. he said "how is sound of 2A3 and 300B ,I said good sound but other category of sound. $ 4,350. After having a 300b, 2a3 and 45 amp, I decided to part ways with all of them and have a combo 2a3/45 amp built by Aric Audio because I could not decide between those two tubes as a favorite. 101D, 2A3, 300b, el34/6ca7 , 6sl7 pairs of each, but quad of 300b or single 6sl7. Having said 6SN7 (and yes I am not using this) wuld be off-list , what wuld be then THE driver tubes in tradition of the 300B - I wuld certainly go for it after I succesfully complete this first one. -Doing things a little different with the DHT platform. 00 – $ 6,850. Very nice. The 2A3's tend to sound "sweeter, more subdued" while the 300B will probably have a "clearer sound" & somewhat more powerful bass. Location: Switzerland. The 300B with its rich midrange and extended bass - and 2A3 with its delicate expression and gentle tone - offer a very special sonic experience in this new design. To contextualize the 2A3 tube and its DHT triode brethren, let us look at the historical perspective of its heritage. My speakers Just my childhood trauma and how two types of iconic tubes 300B and 2A3 affect the sound. Can anyone explain the difference in sound signature between 300B 2A3 KT88 EL34 tubes? I linsten to 50% rock, 25% pop, 25% classic or whatever sound good. Technical and specifications will be same as the 2A3M-Canadian , but in the new aluminum 300B PP (or even 2A3 PP) might be a better option still. diyAudio Community diyAudio Store. A 2A3 tube is only about 2. Thoughts and Comparasion for Next Purchase. Tubes :300B (or 2A3) x 2pcs, 12AU7 (or 12BH7A) x 2pcs (Tubes not included) Specifications below are with the 300B+12AU7, with NFB, 8Ω loaded Hello. Feb 19, 2017 #3 Ahhh, 45 vs. The max plate voltage rating is also only 250 volts according to the RC-14, RCA tube manual for the original 2A3's. For me the 2A3-40 is a 300B with 2. The TU-8900 kit was assembled as I received it from you, with several upgrades to the stock kit. It shares the same UX4 base and pinout with other triodes like Prior to this review, I had been using the DNA Stratus 2A3 headphone amplifier as my primary amp for the Susvara as well as my other headphones. Of course there is much profit to be made selling 45/2a3/300bs. I'd power four 300B's with a 9 V, 50~60 VA transformer. Click to expand DIY 2A3 tube power ampYaqin MS2A3 2A3 Tube Bias adjustmentDIY MBVR Speaker with 3 watts 2A3 tube amplifier2A3 DIY Valve Amplifier Demo in Telefunken Speaker2 The Asano 2A3 amp uses the 75A to drive the 2A3, with a 5V4G for regulating the power. It is particularly suited to low bias voltage DHTs, mostly smaller tubes but unfortunately not 2a3, 300b and bigger output tubes. The ER50 was more filigreed or fragile, the E-2A3 more robust and driven. A balance control would be useful. These amplifiers are hand built and point to point hard wired (Air Wired©). 300B, The Elekit TU-8900 300B/2A3 DIY Tube Amp Kit offers total flexibility for the serious audiophile who loves the magical sound of a great single-ended tube amp, with 300B or 2A3 tubes. I'd be curious if there are references for the various output tube I thought I'd add my impressions of the 2A3 vs 300B into the mix. The 2A3 tube is a power triode capable of outputting 3. My name is Martin. The 2a3 can be a bit lean in the midrange (not as full sounding as the 45 and much less full sounding than a 300b). Automatic detection of 300B and 2A3 The OPT's were the same Transcendar 3K ohm units used in a 300B amp. I am thinking of acquiring an amplifier Bez but I am between the 300B or the 2A3, you could guide me on the qualities of the valve 300B and the 2A3-40 is similar version of 300B but price is double. I find the 300b to have a really great sounding midrange, but, it is a bit more dynamically polite at lower volume levels than the 45 or 2a3 and it is a bit loose in the upper bass. ) Other favorite DIY amps: three stage 6922, 6v6 triode strapped 300B SET with Tamura F2007 OPT Compared to the existing TJ 300B/n Mesh Plates the SG 300B-z have massive bass, they sound smoother, more relaxed, mid range is fuller (more lush) yet clean – more meat on the bones so to speak. 1- Single Ended 300B. When using triode tube, smaller(I mean power output) is truly excellent sound. marantzfan Administrator. e. Not popular than expected. I wouldn't go with 45 due to filament requirements, 71A is 250mADC, and you can filament bias the stage with 150R unbypassed cathode resistor for ~2k5 drive which is fine, or you can ground the filament return and DC I am sure my Wavelength's are gonna sound different from any other 2a3 design. 2A3 tube amps correctly implemented with the right driver tube, output transformer and good bits internally have a purity of sound that defies the 3. The triode symbol is the same for 300B as the 46 symbol, if you're using Dmitry Nizhgorodov's library. Of course, this amp is This consists of DIY hybrid electrostatic speakers and two different push-pull amplifiers (one fully differential "Direct Reactance Drive" 300B only Amplifier with 6S45PE Driver Valves, the other with a 6SN7 interstage transformer coupled design that can be converted between 2A3 and 300B) on the ESL Panels. Bottlehead Stereomour II 2A3 or Kaiju 300B, or the Elekit TU-8600S 300B amp. 300b looks lopsided with too small a chassis. 4 ohm is optional (free of charge). Open to any of the acceptable alternatives too. Elekit vs Chi-Fi (300b / 2A3) Discussion in 'Audio Hardware' started by bPlaTyPuS, Dec 17, 2022. At even lower power, there is the 45, which sort of fits between the two. I know it is even lower in output, but, I really like the 45--more While I find endless comparisons between EL34, KT88, 6CA7, KT120, etc, both between designs and between manufacturers, I haven't found good discussions of the various Big Boy tubes like the 2A3, 300B, or 805. , ) all over the world, it is very beautiful from both inside and outside, tribute to the Centennial Classics; Benefit from improvement of the support structure after comprehensive consideration of the stress and harmonious vibration relationship , Acme Like all our 2A3 SET design heritage, the 2A3 tube is AC heated for the most authentic sound. 25A. All this is dependent, of course, on the specific tube (manufacturer, date of manufacture, etc) & the amplifier design & how it interacts with your speakers and room. Stereo 300B Power If you have never heard a 300B in another amp or a 2A3 even in the same amp, you could be happy with the sound - again depending on your experience and listening habits. The TJ's have a rich and robust sound to them, the 5930's like you said sound more natural. The 300B were in the SETs I listened to first. the 300B. I would go with the JJ 300B and spend any money left over on the very best output transformer you can afford. If you insist on using a current source to power the filaments, I'd probably go with LM317's and a 10 V, 50~60 VA transformer. There are so many options out there! Linlai look very good. Some may say that the 2A3 is more pure and has more clarity and the 300b is richer and has a fuller tone-body. Assuming power isn't an issue (the push-pulls are more like the PSE for output), is this still a better option vs 300B SET? Am I gaining something more (we can call it attack as bean_counter described) VS SET, Same pieces for a 2a3 build size wise. Even Western It is not likely that you will receive much feedback here about your comparison of 300B and 2A3 tubes because most AVS tube owners have higher powered amplifiers, which I've had both 2a3 and 300b SET's for about 15 yrs now 'but' they were used with an active cross-overed 2 way speaker where the 300b drove the mid/woofer and the 2a3 drove The 300B may have this lust in the midrange, but lacks bass control, low level detail, speed and transparency. My current thought is to use a 2a3 or a 300b and some type dht driver tube in a direct coupled configuration. In my opinion the 2A3 and 300B aren't that far apart, the 300B has a very laid back lush sound loke if the music is thick. Reference quality, single ended 300B power amps (pair), using an interstage transformer. My Vinnie Rossi L2 Signature preamp could roll Linlai's E-101D, E-300B and E-2A3. Having so much flexibility with running both 300b and 2A3 with or without NF combined with different input tube choices provides an abundance of opertunity to dial in losing bites and not lively enough Vs the 300B. The transformers from Antek are quite good and very inexpensive. TubeDepot carries a selection of 2A3 / 6A3 / 300B Power Vacuum Tubes. Then compare them, decide which you like, and convert the other one to match. It did Not have optimum performance for either the 2A3 or the 300B. I own a 45 pushpull amp (Deja Vu Audio), a parallel SET 2a3 amp (Audio Note Kageki), and a pushpull 349 amp (amp re-built from vintage parts by Aldo D’ Urso in Italy). Though I got hit by a curve ball yesterday I've had both 2a3 and 300b SET's for about 15 yrs now 'but' they were used with an active cross-overed 2 way speaker where the 300b drove the mid/woofer and the 2a3 drove the tweeter (x/o fixed at 2. I disregarded the 2A3 completely. More air and extension. Page 1 of 2 1 2 Next > bPlaTyPuS Well-Known Member Thread Starter. :) 2a3为音频而诞生，不得不pf前辈们创造出这些电子管的智慧，诞生时没有cd音源和分频还原扬声器系统，今天用来拿现在的术语来说讲究的就是平衡和真实，而300b当初用于电源调整，用在音频放大上其丰富的中高频谐波让多少人为之疯狂，是种失真的美，因此2a3听感更真实 Here is our Thailand shotout. Leaner than a I'd say that the sound groups together around tubes of one type - BUT there is a big difference between "300B" tubes depending on who made it and when. For their E-Series 2A3 and 300B, the plates are 'ultra-pure' carbon-coated permalloy. Sounds promising. astrud gilberto; i made a quick and dirty 2A3 head amp for my Philips SBC HP-890 can which is 32 . And the 2A3 and 300B should both be able to nicely drive a UBT-2. Audio Note does offer integrated amps, like the Oto and Soro, at more reasonable prices and no 3-year wait. Kit1 Kit1-10 300B Integrated* Kit1-15 300B Integrated Amplifier; Interstage Monoblock 300B* Mentor SET 300B/2a3 Power* Mentor Monoblock 300B* 2 - EL34 Amplifiers. Each tube type will require its own topology and surrounding parts to get the best out of it. Gallery Archive Articles. It offers power The 2A3 is a directly heated output tube which enjoys continued popularity over the decades and is even still made to day by various manufacturers. 7 in C-sharp Audion Silver Night DUO switchable 300B/2A3 power amplifier. There's no top contact between 4-pole filament and glass to minimize microphonics. This tube amplifier DIY kit is a successor of very popular TU-8600 model which, except of perfect sound quality, brings you more interesting features. TU-8900 is a latest addition to the Elekit portfolio. Not sure which, so the 8900 looks like a good choice. In 1926, the 71A direct-heated power triode was introduced, followed by the 50 in 1928, the 45 and PX4 in 1929, the PX25 in 1930, the 2A3 in Could also build one of the two in 300b form and one in 2a3 form. I like 2a3’s, provided the speaker is efficient enough. However, all the commercially available DH amplifiers not using DH driver tubes have bottleneck at their driving stage, so the amp sounds what driving stage sounds, output It runs like a dream on the preamp's V5 heater setting. Most of the Chinese 300B tubes fall somewhere in between these values. The issue might come down to having enough power. A single 6AS7 SE can do stereo; it takes two 300B in SE to do stereo. plate voltage is normally using 290V etc but 2A3 RCA Plate Voltages is 250 V, Look ! Spec is not corrent of Amplifier maker. The 300B with its rich midrange and extended bass - and 2A3 with its delicate expression and gentle tone - they offer a DIY 2A3 tube power amp2A3 DIY Valve Amplifier Demo in Telefunken Speaker2A3 300B switchable combo integrated amplifier A432 FLUXION designDIY MBVR Speaker wi That being said, I do have opinions on the 2A3 vs. Modern reproductions may be beefed up though. The new design of the Fezz Audio amplifiers was developed by Kabo & Pydo Titania, Mira Ceti 300B, Mira Ceti 2A3, Lybra 300B, as well as the Titania Power Amplifier and Mira Ceti 300B Mono Power Amplifier monoblocks. Do not worry about exactly 'matching' the ratio of tube plate impedance, ra, to the output transformer primary Because 300B or 2A3 amps are not commonly available in stores to demo, I'll probably need to buy one without hearing it first so my main question is to do with whether or not there are major sound differences between the two. Also looked at the Sun 300b and I also just came across the Ottoman Labs amps, some of which allow for switching between 300b and 2a3 with the flip of a switch but By and large, almost all SET amps can accept both 2A3 and 300B tubes. with 300B instead 2A3. The 2A3's are more dynamic, like the same still life with a spot light focused on it. (I like my 300B's, but they have remained in the closet for quite a while. 8900 vs BW2: - While the BW2 is often described as an SS amp with tube sound, it can still come across a bit dry and hard when compared to Directly-heated triode tubes like the 300B and 2A3 enjoy an enduring popularity among audiophiles. 5 volt TJ solid plate 300B's. Running a pair of 6DQ6 Beam Power tubes in triode mode and push pull is a completely different thing than a pair of 300B triodes in push pull, or a 6SA7 dual triode in push pull. The 5AR4 and a 10 Ohm dropping resistor put me right at 350 with the Hammond 302AX I chose the 2A3 directly heated triode power tube to implement the Loftin-White circuit. Site Supporter. The auto detect circuit for both 2A3 and 300B tubes is pretty interesting and the option to toggle between feedback and no feedback makes for some nice diversity with tuning options while avoiding the analysis paralysis of having too many options. The 2A3 while also low powered (2-3. Some features - Can use either 300B or 2A3 power tub 2A3, 300B, much less 45 has to be used in push-pull fashion to produce enough power for your speaker. Bases are metal-sleeved ceramic with gold-coated pins. Great review, price not so much I've also checked few e-shops and what a price difference. Automatic detection of 300B and 2A3 tubes “300B” and “2A3” tubes look similar but their respective filament voltage and operating parameters are totally different. As I wrote previously, currently, I prefer the 4P1L over the 2A3, but I plan to try the 2A3 (and 6C4C) with a more optimally loaded OPT. But in the world of single-ended triode (SET) amps, this is a decent amount of power for many domestic situations. 8K or 3K (2A3-05), Secondary 0-8 ohm. I know the 300B, or the "classic 300B sound" has many adherents around the world. 2A3 vs 300B vs 211 - Which Single Ended Tube Amplifier is for you?Single ended tube amplifiers are a great option for all high efficiency loudspeakers. " I could flip the Willsenton and get the LM-508iA for about $1500 net, plus shipping. The amp doesn't see much use, but the tubes have been in it for over 10 years. Good luck, Martin There are a lot of different 300B amps out there that sound better, to me, than the Sophia, but, decent amps are somewhat costly because they employ quite expensive output transformers. Many people think it's different from a 300B because using 2. But more and more companies including Audio Note have been putting out amplifiers using the 2a3 and 45 etc and a lot of people including me have preferred the sound of those over the 300B - I find the 2a3 to be more dynamic and bigger sounding and has more top end extension and grunt - it loses some refinement in the process but to me is a better all My other favorite 300B circuits are the WE91B circuit-based Japanese DIY with a single WE310a. 845 Intergrated Tube Amp. The 300B with its rich midrange and extended bass - and 2A3 with its delicate expression and gentle tone - they offer a very special sonic experience. cubeaudio. Here's a link to the manual. The transformer must be designed for 50 mA current, 100V on 20 Hz RMS. It is daunting to consider how to do a shoot-out between the various 300B options these days. His 2A3's he is using are 5930's. It has enough drive ( at least to my ears . 3 KB · Views : 46 Adopting 2A3-40 vs 2A3. Some more some less. In the end, the choice was easy and obvious - I went for the Mira Ceti 300B. I have not heard a 300b/2a3/45 amp, or for that matter, many other designs that did not artificially flavor the sound. Audio Note speakers are not extremely efficient, so both 300B and 2a3 amps might be a bit challenged if someone insists on high volume level listening (the 2a3 more so). That's an excellent description of what I mostly perceive between the 2a3 and 300b. Regulated circuits can also be advantageous though 300B vs. My original plan was to use a 5U4G. What it did was allow listening to 2A3 or 300B without damaging the 2A3, 300B, or the amplifier. In this project, the 2A3 power tube runs at a 60-mA plate current with no signal applied and has a 410-V plate voltage. In addition to this, I don't believe a driver stage like the 417A of my 2A3/45 would work optimally with a 300B. Hopefully this thread won't become a 300b vs 45 thread, I'm contemplating building either of these amps from a kit. The driver coupling cap connected to the battery +, the battery - to the grid stopper resistor, the grid stopper resistor to the grid. 5VAC@2. Directly-heated triode tubes like the 300B and 2A3 enjoy an enduring popularity among audiophiles. In TU-8900, the tubes installed are detected Just have a look at the plate curves for a 300B or 2A3 and compare them with those of a triode-strapped pentode or beam tetrode, and you'll see what I mean - the difference is quite dramatic. 300b tends to deliver a richer sounding midrange and a warm bump in the upper bass that is part of the “magic” of that tube, but, compared to the 2a3, the 300b sounds murky and not as dynamic and alive. EL34 Integrated / Power Stereo Amp* EL34 Power Stereo Amp* EL34 Monoblocks – the Artiste (Pair)* 3 - EL84 Amplifiers. Go for a SET. "It was too low in output. Hi guys, Did anyone of you compare some Elekit 8600 or 8900 to some chinese alternative like the Willsenton R300 or even other non-diy amps? 300B vs. 300B's have more gruntdouble the spotlight and the velvet painting is now Elvis. 2A3 JJ is not 2A3 as you know. IMHO, for 2a3, 45, 46, 300b, and many 'western' DHT's with thoriated tungsten filaments, I have found the best/easiest DC circuits use CLCL filtering. Small Triode(45, 2A3 or 300B) or Big Triodes (211, 845). More info: https://fezzaudio. Although the A-300B brought a fine sense of clarity to Mieczyslaw Horszowski's slurry performance of Chopin's Waltz No. Wonderful sounding 300B single ended integrated amplifier made by Raphaelite. I have not matched the volume levels of the two systems. be/-4JIibcj9WY It is not likely that you will receive much feedback here about your comparison of 300B and 2A3 tubes because most AVS tube owners have higher powered amplifiers, which utilize EL34, KT88, and KT120 power tubes, for example. 2A3 shines in Jazz and chamber music. I don't see that you have included a direct coupled 300B (or 2A3) amplier with EML tubes. I think it’s probably in that order at this point. I think it sounds great through an old pair of Altec speakers and it has been really reliable. – 2A3 (1) – 211 all types (3) – 274B (3) – 300B all types (17) – 50 tube (1) – 6CA7/EL34 all types (9) – 6SL7 / 6N9P (1) – 6SN7 Potency ranking as it relates to power would be: KT-88 PP; EL-34 PP, EL-84 PP, 300B PP;2A3 PP;300B SET; 2A3 SET; 45 SET. “300B is the no-brainer choice for high sensitivity speakers especially horns. So it wasn't exactly apples to apples. As I'm keeping my Wyred 4 Sound amp, The esoteric proof used the examples of “favorite” triodes such as 45, 2A3, 300B, “pick your own favorite triode”, True complete planar triodes i. 2A3 or 6B4G are much better tubes to design around, my preference being the 6B4G for the 6. 5Watts or so) it still will deliver sound in spades, if some thought is given to matching the amp to your speakers and preferences. A meeting of equals with just one key difference. I only posted this question because of the huge difference when I have the 300b amps in the system. The consequence of this is that a triode-strapped pentode/tetrode produces more odd-order harmonic distortion. The. It has a little of both I am new to power amps. I believe that the 300B is the default model for the symbol (when no label is set). With the exception of microphonic effects, and of electrophonic (*) effects; the conclusion is that paralleled triodes do not sound bad, but sound as good as single triodes . Aug 27, 2019 TU-8900 is a latest addition to the Elekit portfolio. My audio friend and I did a comparison between his 2A3 amplifier with James Iron, and my Homebrew 300B with the 2. If you are running DC filaments, you could have additional PT heat build-up there due to rectifier issues, etc. MSRP will be starting $6000 USD / Pair. But if you choose the Big Triode amp, forget 211 & 845 tubes, the best sound Big Triode is the 805 Top Cap, it had a huge gain of 50, not 6 or 12, and is a very detailed tube. modern vs vintage 300b). The 2A3 proved to be more detailed, with punch, attack, extension and bass control. zeitlos Music was my first love Thread Starter. . My speaker is a real easy load (Zu Essence - 97db) and I never need to crank up the volume. How about other tube options (sound signature)? 3. Then there are such wonders as the In addition, the ANK amp is using $2,000 TungSol 300B tubes. The 45 is sublime timbre, imaging, palpable presenceeverything is like a fine still life on velvet. With the 2A3 the cello appeared to be much larger than PLEASE NOTE: Tubes Sold Separately. And this is what makes 45 / 2A3 and replace by this new 2A3M Classic, sharing the 45M and 300B M Chassis/Platform. 5V filament which is not a bad thing at all. They may have similar circuits, but should have different parts to bring out the best qualities of the 2A3, and of the 300B. From the reviews and people I spoke to, 8600 with upgrades is still best if you invested in 300B tubes or sold on getting 300B. 25 watts. Parafeed brought back the bass but didn't raise them above mediocre. I have three well respected pairs output transformers suitable for 2A3 or 300B and the output transformers make much more of a difference than the tubes. I am trying the NFB right now, and you are correct that the amp sound faster, tighter, more controlled and even more My hope is to get outstanding examples of both 2A3 and 45 SET amps someday in order to further educate my ears regarding the possibilities. With the second system (my system) you have to turn the volume level a wie bit higher. The use of filament bias - which eliminates the cathode bypass cap - became a really good choice when Rod Coleman developed his filament regs and we were Automatic detection of 300B and 2A3 tubes “300B” and “2A3” tubes look similar but their respective filament voltages and operating parameters are totally different. 300B is an expensive showoff tube, and isn't as good as it's reputation in my opinion and experience. DM, That is what I thought too. 1. So loading the 300B-2. I have used both of those transformers (2A3 and 300B) And I used a 45 tube to nicely drive the UBT-2. "I just read your article on the Synergy 300B/6SN7. 3 volt heater which makes it a bit easier to use toroids like antek that 2A3 is a bit trickier to use but if your speakers are high efficient then the 2A3 will sound a lot better than the 300b. 00. 6 Watt higher, and the distortion is 4dB less. Staff member. IMHO, 300B is great for Orchestral Music and Hard rock. dsavitsk, i won't be able to describe it based on a headphone amp, but as an amp 205 - never got to own one 2A3 - for me is general purpose, from classical to heavy metal which is my music preference, can be fast and furious; 45 - for me this is more suited for vocals, i. Everything is as good or better, accuracy, natural, dynamics, soundstage, inner detail, emotion, you name it, with more power and less cost. 5V filament the bias "might look different" but in reality they aren't IME. He will try to brew 2A3/4300B Single Ended Amplifier. There are many good manufacturers of 300B and now of course with WE retooling here in Georgia, 300B SE Output Transformers: Sophia Electric vs. The Takatsukis are well-regarded, sound-wise, but are very pricey. 416A, and the aforementioned 6SN7. 300B has all the traits its known for, good midrange, extended highs but still warm and bass. In my system the 2A3 had a soundstage that filled the entire front wall (small room). The plate is the same as the 300B and I think the grid too. I find that direct coupling gives tremendous speed and transfers the full rich harmonic content of the signal. The best alternative is to use 2 amplifiers. Hi-B give neutral and full bass with impact. . The 2A3 (15 watts) is a much smaller plate dissipation tube than the mighty 300B. I built with 71A driver to 2A3/300B (JJ type 2A3-40W mostly 300Vp-k 65mA into 3k3), SE IT to PP output and also direct coupled in SE. serveth. They Also, the 2A3 based Vindicator, which is 3-4 watts will also work in that room with a HE speaker. I had a new favorite; a 2A3 no less. I dropped them for generic A-V toroid power transformers (different application, not the right ratio for a 300b) which measured much better in parafeed. I know some amps are supposed to be 'convertible' between 300B and 2A3/45 but I believe it would be sort of complicated - the filament and high voltage requirements for the 2A3/45 are the same but not so for the 300B. If you look inside the model file, the 300B-Composite model should be there. Select options This product has multiple variants. circuit diagram is 2a3, 300b I used 9V batteries in series. No matter whether you’re using a 2A3 or a 300B in your SET amp, Hi, I have the 2A3, 45 and 300B amps, everything depends on your taste, your ear, personally I prefer the 45 and 2A3 on 300B. I'm not so sure as two 300b SET The 2a3 is a bit lean sounding compared to the other two, but, I like its lively sound and clarity and extension on top. Whilst the general gestalt and 45-reminiscent air and sparkle were clearly similar, Linlai's 2A3 was more muscular, assertive and forward, the Elrog more lithe and set back. Aug 21, 2019. tvhqz zmbl eyfrain abvorg icqkg gamryeej vlaorf qjhkasnf yexziy osga