300b lovers

I have been an owner of Don Sachs gear since he began, and he modified all my HK Citation gear before he came out with his own creations.  I bought a Willsenton 300b integrated amp and was smitten with the sound of it, inexpensive as it is.  Don told me that he was designing a 300b amp with the legendary Lynn Olson and lo and behold, I got one of his early pair of pre-production mono-blocks recently, driving Spatial Audio M5 Triode Masters.  

Now with a week on the amp, I am eager to say that these 300b amps are simply sensational, creating a sound that brings the musicians right into my listening room with a palpable presence.  They create the most open vidid presentation to the music -- they are neither warm nor cool, just uncannily true to the source of the music.  They replace his excellent Kootai KT88 which I was dubious about being bettered by anything, but these amps are just outstanding.  Don is nearing production of a successor to his highly regard DS2 preamp, which also will have a  unique circuitry to mate with his 300b monos via XLR connections.  Don explained the sonic benefits of this design and it went over my head, but clearly these designs are well though out.. my ears confirm it. 

I have been an audiophile for nearly 50 years having had a boatload of electronics during that time, but I personally have never heard such a realistic presentation to my music as I am hearing with these 300b monos in my system.  300b tubes lend themselves to realistic music reproduction as my Willsenton 300b integrated amps informed me, but Don's 300b amps are in a entirely different realm.  Of course, 300b amps favor efficient speakers so carefully component matching is paramount.

Don is working out a business arrangement to have his electronics built by an American audio firm so they will soon be more widely available to the public.  Don will be attending the Seattle Audio Show in June in the Spatial Audio room where the speakers will be driven by his 300b monos and his preamp, with digital conversion with the outstanding Lampizator Pacific tube DAC.  I will be there to hear what I expect to be an outstanding sonic presentation.  

To allay any questions about the cost of Don's 300b mono, I do not have an answer. 




The sound of these amps continues to blossom by the day, providing the most realistic sound presentation I have ever heard in my room.  The images are palpably real with a pure tonal correctness to the music.  I forgot what Don sourced for the stock tubes, but he recommended much better, but yet still afforable, 300b Linlai tubes, which is tells me will be even more revealing.  I have rolled a boatload of input tubes in gear over the years, but will be happy to rely on Don's recommendations for affordable 300b tubes.  By all accounts, Emission Labs also makes excellent 300b tubes, but they are nearly twice the cost of the Linlai tubes I ordered.  Honestly, I could easily live with these stock 300b tubes, but Don assures me the Linlai WE300b tubes will provide a significant SQ improvement.


It is so good and refreshing to read how much you are enjoying your Don Sachs 300b amplifier. I’m on my 2nd pair of the EML XLS 300b tubes. They are superb! However, I’d trust the Lanlai 300b recommendation from Don. I am lucky in that I only need one pair of tubes for my SET amplifier. Your PP amplifier obviously requires 2 pair of 300b. Things can become expensive quickly.😊

If he said the sound quality further improves, I believe it based on my experience with various 300b tubes. Keep us posted.



Thanks as always for your positive comments; you set the high mark for thoughtful and erudite comments on this forum, once and always the most generous and civil gentleman on all audio matters.  It would be a delight to meet you one day. 

I got a quad of the Linlai 300b tubes recommended by Don from his Chinese supplier for $800, which is ~40% of the cost of the Emission Labs quads, yet Don admits that your tubes are even more revealing than the Linlai tubes.  You have to pay to play with these tubes, but if Don is using these Linlai tubes in his own 300b monos, that is good enough for me.  I sure hope they are long lived.  ;-)


Thank you for your very kind words. I don’t have any experience with the Lanlai but hope that they are durable and trouble free. Yes, the EMLs are pricey, but fortunately utterly robust and reliable. I got over 11 years with my first pair with very frequent (Many long listening sessions) amplifier usage.


Good gosh, were I to get 11 years out of 300b tubes, I'd be extremely happy as would my pocketbook.  ;-)  I added some fans in my audio rack to ally some of the heat generated by the tubes.  As I say, I am willing to play to play for this degree of sonic splendor.   How Don got 27 wpc out of these monos is a mystery to me, but they sure drive my Spatials with alacrity and I am sure they'll do the same with my new Cube Audio speakers.