I couldn't find any dedicated thread for this amp, so I thought I would share my thoughts on this pretty sweet amp! Listening Rig: Pi2AES > Bifrost 2 | Matrix X Sabre Pro > BHA-1 | Black Widow > JAR650 | Borealis | modded HD800S - First off, this is one of the few solid state amps out there that synergizes well with HD800. no joke, even the stock HD800 was sort of listenable which really surprised me. What was even more surprising for me was that it wasn't a warmpoo amp trying to mask all the flaws of HD800, rather play to its strengths without messing up the FR too much. - I would say overall tonality is "neutral" with a hint of warmth. At least to my ears, it doesn't really seem that colored to me. - Really, really good sense of dynamism, in both macro- and microdynamics. Very engaging and lively amp, reminescent of the Amorphous 3F I had a while ago... except at 1/3 of its price. - Excellent sense of clarity and helps reduce the veil of my good old 650s. - Impressive transients with precise and clean attack. This was immediately noticeable when I was using my modded HD800S. - Great staging capabilities, for a solid state with good width and depth. It's not as grand and deep as Eddie Current stuff, but actually has front and back layering. Most solid states I've heard seem to suck at this part, but the BHA-1 seems to do well here. - My favorite DAC pairing was with the Bifrost 2. XSP+BHA-1 works fine, but the BHA-1 really sings with the Bifrost 2. The BF2 gives a good sense of body and punch, where XSP+BHA-1 can sometimes sound a bit thin with some tracks. I still very much enjoyed the combo, but if I had to choose between the two DACs I would choose the BF2. - My favorite headphone pairing was ...the JAR650! BHA1 makes JAR650 have a decent staging capabilities despite the 3 blob stage and with improved macrodynamics/slam. But yeah, Holy moly such great synergy that gave me many late nights of "Ugh, just one more song!" "Oh SHIT it's 3AM already" Borealis works well too, but I actually prefer the BW with the Borealis. BHA-1 vs. Black Widow - BW is easily the more colored one, with its warmth and gentle highs. - BW has rounder transients compared to BHA-1's clean and sharper response. I did notice that the roundness can be ameliorated by using a more aggressive DAC like XSP. BF2 just makes it sound a bit too warm and lush with a touch rolled highs. It could work well for people using brighter headphones, but yeah YMMV - BW has better macrodynamics/slam but BHA-1 is not too far behind. BW makes everything slam hard, where BHA-1 slams when warranted. - BHA has slightly better microdynamics and sounds slightly more nuanced in the minute changes in comparison. BW is no slouch in microdynamics tho! Both amps provide a very engaging listening experience. - BW's bass has a touch of "tube-like" bloom where BHA-1's bass is clean and tight. - Both amps have decent staging capabilities for a solid state, but BHA-1 projects a more outward, diffuse stage in comparison. If you're a stage head, I think you'll appreciate BHA-1's staging capabilities. - You can't go wrong with either amps, I think it matters more about how it synergizes with your other gears in the chain TLDR: I think this is a great all rounder solid state amp that is "reasonably-priced" and can provide an alternative flavor if you find the Black Widow too warm and lush sounding. For me, this is the perfect place holder amp while I patiently wait for Starlett to arrive on my doorstep.