Here’s an awesome amp I just finished for a customer in NYC. This was really fun to build! He wanted a high-current version of the GFA-545, so we went all-out with dual Avel 500VA transformers, gigantic 27,000uF filter caps, and a truly dual-mono layout throughout. This amp has dual power cords, fuses and power switches.
The sound is just incredible! Perhaps the best one yet. Super clean and powerful, and never seems runs out of gas, right up to clipping. I’d say it has an effortless sound to it. I measured 162W at 8 ohm and 272 at 4 ohm just before clipping! That’s only 50W short of a perfect doubling of power at half impedance. That is one stiff power supply!
Continue reading A custom GFA-545 II with an insane power supply