uncola

This is the second revision of Parker's Associate headphone amp, he called it The Executive. Tom from eta headphones helped him organize the PCB order and BOM list for diyers. For more info check out Parker's topic on the eta headphones discord in the System Dump Engineering topic I think his idea was a modern CMOY but taken to the limits of refinement with a single opamp and a nice power supply for a super transparent linear amp, also he made the executive better able to support discrete opamps. My friend Micheal Amster built mine for me since I'm all thumbs and my last couple of diy kits did not go well. I made a few appearance suggestions to Micheal when he built my amp definitely influenced by all the cool diy amp builds I followed over the years on this forum from cool dudes like purk and john mcclean I just received it today so I'm in the honeymoon period but I'd say Parker achieved his goal, it's super detailed and transparent, punchy bass, extended sounding highs and lows. a very "hifi" sound. Finally I feel like my beryllium tweeters are achieving their full potential listening to things like louis armstrong - st james infirmary The only appearance detail I might change, I had him put the power button right next to the volume knob because I wanted maximum space for the laser etched LOGO on the left.. I probably should have put the power button on the far left with the logo in between it and the volume knob. Also the logo is a bit faded out on the silver case, it would look better on a black case. the only deviations from the stock parts in the BOM I asked for were the EIZZ stepped resistor ladder attenuator and changing feedback resistors from vishay dale 10Kohm to vishay bulk foil 1Kohm to change gain from 10db to 1db(better for near field desk use when used as a preamp) and bulk foil is supposedly nicer than vishay dale. Then I replaced the stock opa2132 with a staccato discrete opamp I'm really enjoying it with a Laiv Verse r2r dac as the source and Dunu Mortise full size dynamic driver headphones. This isn't a high power amp so might not be great with difficult to drive planars. I've heard it's low noise enough for iems so might test that soon. It's working great as a preamp to my speaker amp/desk speakers too more info https://etaheadphones.com/products/executive hope it doesn't sound like an advertisement, I JUST got it today lol so I'm fully in the honeymoon phase. I also recently got a eufonika h5 hybrid tube headphone amp with 4W output I also really love for a different sound