Don Sach's pre amp

Thanks! Nice system you have there.

@gryphongryph ... thanks.

rlb61,
We will await your comparison of Don's latest preamp to your BAT preamp, which even at pretty much twice the cost of Don's preamp, will be worthy comparison.  There is magic in his 6SN7 tubes!  I had a pair of Joseph Audio RM25XL speakers that for some odd reason I parted with, selling the to Don Sachs, actually.  

I heard the Pulsar's at an audio show powered by a Rogers tube amp and the bass response simply defied belief... similar in performance to the Dynaudio C1's, but with better LF response.

Asghar,
The upgrade of Don's new caps and the rewiring of the preamp to accommodate the more potent 6BY5 rectifiers is something your system would benefit from... it is an easy 10-15% improvement... the instruments much greater spatial definition.  I will be in touch with you after Don's tube amp is run in properly.  We will have fun comparing it to your fine Quicksilver mono block amps.  :-)

Hi all,
I have modified the preamp to take a 6BY5 rectifier because it sounds better and you can source 6BY5 tubes for $12 or less. If you own one of my preamps and pay the return shipping I will modify it for you and provide a 6BY5 tube for $75.   If you own an SP14 kit or any other version of this preamp, please DO NOT JUST PLUG A 6BY5 TUBE INTO YOUR PREAMP AS YOU WILL DAMAGE IT AND IT WILL NOT WORK!   This modification is something I developed for my customers only. I will NOT share the details and I will NOT modify any preamp that I did not build. Sorry, but this is what sets my gear apart from the kit versions.  I have gotten notes from a few people who have built the kit version and asked for the recipe.  No, sorry, but I do not share any of my mods.