Pass BA-3 preamp
Recently completed building a Pass BA-3 front end preamp. This is a part of the Burning Amp series of designs from Nelson Pass and people found this front end to be a terrific preamp. This has no feedback and can be adjusted to a mix 2nd order or 3rd harmonic content to sound warm or otherwise.
Sounds amazing when I coupled it with Pass F6. Is better couple of notches than a B1.
This preamp has loads of gain and also strong current drive capabilities, unlike the B1 which is a unity gain buffer.
The PCB is available at online store of diyaudio.com
Schematic and build guide are on diyaudio.com
Attached is the picture of the populated PCB along with a dual rail power supply board. I have removed the B1 from it's chassis and replaced with BA3.
I will highly recommend this build to you guys.