Trevor Morley's Tache
Well-Known Member
My amp is true dual-mono. Each chip has its own power rails fed from separate bridge rectifiers and separate transformers. The only common connection between the channels is at the amp power connector, which is only the same as them being connected at the ring main ramp or the fuse board. It's a NFB amp, and the feedback resistor is soldered directly across the chip pins. It's input signal into attenuator, through the amp and out to the speaker terminals. No tone controls, relays or switches in the signal path. All in i think it cost me about £300.00, including enclosures/cases cables and connectors. I just shopped around for bits and bought them when they were cheap, or used stuff I already had in my spars box.Yes I'm familiar with these sorts of chip amps, although have not heard them myself. I am sure they can sound pretty decent, and incredibly so, considering the minimal cost.
FWIW I spent quite a bit more on a NAD M33 which is based on Purify IET400 power amp modules. Soundwise, tbh, it's money wasted because it sounds indistinguishable (to my ears) from the RME ADI-2 Dac and B&O Icepower amps it replaced. But it runs BluOS and is therefore a joy to use, ergonomically.