Introducing my Remastered Super 2A3 SET stereo amplifier, featuring more than a few upgrades over the original. A more robust input and driver stage drives the 2A3 with better linearity and transparency to full power.

Jan 30, 2021 · Hey guys, just built the sun audio 2a3 using all Hammond transformers. I like what I'm hearing (clear/transparency/detailed) but I'm looking for a more warmer/meatier sound. Any advice?

Feb 2, 2018 · I have a 2A3 SET amp I love, but I have been looking at a 2A3 push-pull amp that looks pretty enticing. Does the 2A3 retain its magic in push-pull configuration? I am looking to drive some Tannoy 15" Golds, and I am thinking a 2A3 push-pull amp might be as nice or nicer than a 300b SET.

I order the Sun Audio 2A3 because I like to try SET tube amp for late night listening and I don't want to wake my family up. I check around and because Stereophile Sam's strong recommandation. This amp also list in Stereophile's Class A tube amp.

Aug 12, 2010 · This is our 2A3 single end class A integrated amplifier which is designed and made on the basis of the classic 2A3 circuit, 6SN7 double triode drives 2A3 in class A single end with 5U4G rectifier. The output power is 4W.

The 2A3, as a specialized DHT, pairs perfectly with simple and straightforward amp circuitry, reproducing crystal clear top-quality music. 2A3 tubes’ portrayal of harmonics, texture, and tone is not only outstanding but does it with minimal noise and distortion.

This matched pair is meticulously engineered to provide the ultimate sonic experience for discerning audiophiles and music enthusiasts alike. The KR Audio 2A3 tubes are fully compatible with any well-designed 2A3 amplifier, making them the perfect upgrade for your existing setup.

The KR Audio 2A3 HP tube is fully compatible with any well designed 2A3 amplifier and sonically delivers exactly what owners of these special amps expect. Pure sense of space, perfect subtle timing cues, and a brilliant tone make this a tube the go-to choice for all 2A3 enthusiasts. The perfect upgrade for any exiting 2A3 based system.

Mar 15, 2023 · The 2a3 deserves a DHT driver stage to make it sing. Choice of e.g. 2P29L, 4P1L, 26, 112A, 10Y all in filament bias. 2P29L the easiest to build with Rod Coleman filament regs. You will need a 1:4 step-up transformer on the input and I use a Hammond studio series 1140-LN-C. Very happy with this - my own amp has a 10Y input stage.

Oct 19, 2024 · I am selling this amp only because I recently bought another Aric Audio amp -- the sound of Aric's amp impressed me enough to move up his ladder. This amplifier is in excellent condition, both physically and functionally.