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 now have a VC, which comprises of two matched Stepped Att' VC's for the mono block Pre-Amp' Design .

These are produced by a friend of mine specially for my Pre-Amp's Design only.

The usual ones produced are for my friends Buffer Pre' Design, I was requiring ones that are with a different measurement at 50K.

The Pre' Builder has expressed his satisfaction with them, and has heard them compared to a very similar Pre-Amp' design that has the other VC I referred to. 

FWIW, I drove up from Portland and met three friends to attend the show. There were three or four rooms that stood out, although our short lists were not identical. However, all four of us picked the Spatial Audio/Don Sachs room as our favorite. End game for all of us. I’ll leave descriptive words to others, but it was simply wonderful. It was crowded in there, but I had no problem getting in twice and listening to a couple songs each time. Great to meet Don in person after owning his pre and amp for several years.


We are among the fortunate to have Don's gear and I certainly share your opinion of the the room.  We both got to meet Don in person for the first time and he is a great guy, for sure.  Same with Lynn Olson.  Now with a month of run in with the new 300b monos in my system with my Cube Audio Jazzon speakers, every day of listening brings new joys to my ears.  

I got a little side tracked with this thread, I'm back into the 300b theme .

I did not share, that on Sunday 25-06, I was able to attend a demo' of a 'new to me' system, which has Klipsch Jubilees as the resident speaker.

The resident system in use was quite special.

Following the Lunch recess, a friends P-P 300b Power Amp' was put to use.

The 300b is a late 90's model of which Tim De Paravicini has an input to the design. This Amp is now overhauled and a few circuit tweaks are carried out.

The system owners reaction to this Amp' was immediate, the Cheshire Cat Grin lasted for many tracks.

All attendees were thoroughly impressed by the way this Amp' interfaced in this system and it really shone out for its attractive traits.

That is not the whole story, the systems pre-amp was swapped out for a Bread Board mounted, part completed pre-amp build.

This addition of the New Pre-Amp had a substantial impact in conjunction with the 300b. 

My take is that the design of the 300b in this Thread, has another 25ish Years (50 Years Combined) of experiences of Two Amp Designers, put to use, to help create this latest design.

I would get great pleasure from receiving a demo' of these mono's, to see where there are sonic traits that stand out as being more of a attraction and very much wanted to be kept.   

I’ve been a little quiet since I got whacked by Covid on my return to Colorado. Got an intense sore throat on Tuesday, tested positive on Wednesday, and started Paxlovid that afternoon. Doing better today ... actually, mostly better, and my mind is finally clear again. The metallic taste Paxlovid is famous for hasn’t been too bad, and it is fast-acting. (I tick three of the boxes for "high risk", so Kaiser Permanente of Colorado prescribed it right away.)

Strongly suspect the Denver or Seattle airports as the culprits. Total zoo in both places. If I go next year, I will ask for airline assistance getting to and from the gates. Two things that did work well were TSA Pre-check and Express Bag Check-In.

Don continues to evolve the Blackbird. Full-size chassis, some excellent parts choices, and bringing elements of the much-loved Raven to the Blackbird. The people on the Spatial Audio pre-order list are going to like them ... a lot.