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. 




I like the Viva Solista too.  I own a very odd ball Viva 300b component.  It is the Viva Fono phonostage that utilizes two 300b tubes as RECTIFIERS.  The power supply to this component is massive in size (about the size and shape of the Solista).   


No doubt that your AD1 amplifier will acquit itself well. What speakers will it be paired with? If I were attending that show I would make it a point to hear that system and the Don Sachs amplifier room for sure.


@charles1dad Not sure what speakers yet.  While my new amp is AD1 based, I think its strong points are more the design and power supply than the tubes used.  I'm sure it would sound great in 300b too.

Wish you were going to be there.  I will be there several days and plan to fully appreciate Don's stuff.



I hope that you have a wonderful time at the Pacific audio show. I’m interested in your listening impressions.


Great news - I own a fully tricked out one of Dons SP14 builds.  Fantastic preamp.

Will this new 300b push-pull require that much gain from a preamp (6SN7), or will it have normal input sensitivity?

I'd also be very interested in an integrated version... don't know if that's on the cards. 

Could it even be a DIY kit (Elekit style 😁)... unlikely perhaps, but at least Don wouldn't need to build them anymore.  VK Music seems to do well enough from this business model.

Where do I sign up?