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Burning Amplifier Gain Stage for BA-3

  • 1400


Burning Amplifier 3 Gain Stage Board (BAGS-N). One board works for 2 channels.

The BA-3 gain stage is the latest feedback-less "front end" for the Burning Amp series of Class A Mosfet follower output stages.


Please visit the Burning Amplifier Helpdesk Thread for any questions you might have and for a definitive list of links to all articles and discussions about the Burning Amps.

Additional Information



Dimensions 140mm x 70mm
Mounting holes Holes are on a 10mm x 10mm grid
Number of boards included 1
Layers 2
Board Revision 2.0

Customer Reviews

Based on 15 reviews
Super Sound

High quality boards and very good sounding pre.

Quality Product

DIY Audio boards are well made and I know I can trust the design. Their packageing and shipping are also top notch. Overall a pleasure to do business with.

Idiot proof - almost

Excellent quality PCB any novice could complete.
If there is a wish list, bigger pads please - less likely to pull away if the circuit is modified later.
The only build issue I have is the heatsinks fins are covering the mounting holes I wanted to use (Note to self, next time, fit PCB spacers first!).

BA-3 Circuit Board

Very high quality board. Quick delivery from the US.


Only a few components for a fantastic project. Easy to build following building guide . With my MOFO provides a very great stage.
Very great pleasure to listen. Yhank you!

Makes a great sounding preamp.

Have bought 2 of this boards. Threw one together with parts from my parts bin, an old metal case I had almost discarded, and an LT regulator, +/- 24 VDC. I cannot believe how good it sounds. My ARC LS25 has not been used since. I am now ordering "boutique" parts and am building a better looking unit in a nice new diy audio rack case. I doubt if the new parts could make it sound even better than the first one., but I will feel better knowing I used top quality parts. Honestly though, its all in the circuit. Nelson Pass is a kind, generous, genius, designer.

Great board

Really well made board.
It should come in a seperated version as well.
Im doing mono blocks so i had the chop the board in half.
Maybe make it a snap in half option?
Or sell single channel boards seperated?

Fantastic PCBs!

I have bought the BA-3 PCBs third time. I am very pleased from this product. Very good quality boards and very
fast delivery from the USA to Germany (one week!).
I have used one of the BA-3 boards to build the BA-3 Preamp with the LINEAR SYSTEMS J-FETs from the DIYAUDIO-STORE.
For cascoding I used the TOSHIBA 2SJ313 / 2SK2013. I build my own PSU with CLC-filter,regulator,...
PreAmp and PSU have their own cases.
This Preamp sounds very good! Believe me! I also use a KRELL Preamp, Primare and other nice stuff.
I use this Preamp together with my PASS F5-T Monoblocks and my PASS BA-3 Poweramp (complementary configuration)
and other Amps. My ESLs and other loudspeakers like to be driven by a PASS Amp.
I like it! I love it! Build it - test it - enjoy it!
With the new BA-3 boards I want to experiment with different J-FETs and MOSFETs.
Thanks Nelson Pass giving as this nice little toy!
Thanks DIYAUDIO-SHOP for your very good service!

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