So once upon a time, PE was selling a little amp for $15. $15!!! So I bought two. And with a friend about to swap out receivers, that seemed like a perfect time for a bit of listening comparison. In this corner, the Dayton Audio DTA-1, and power supply: and the last picture shows the cable setup. Knowing those expensive custom AudioQuests have a particular resonance, I used and LCR meter and oscilloscope to counter-tune that with the short strands of AWG24 you see in the picture. The trick is in how you wind the stripped ends around the pins, my friends. In the other corner, a Denon AVR-X3600H, $1099. Trust me, it's a bit beefier than the DTA-1 Denon AVR-X3600H (2019 model) 9.2-channel home theater receiver with Wi-Fi®, Bluetooth®, Apple® AirPlay® 2, and Amazon Alexa compatibility at Crutchfield In between the corner-or something like that-a pair of Focal 936 Focal Aria 936 Loudspeakers (each) This round, we listened to - Lee Ritenour "Night Rhythms" and "Latin Lovers" - The Doobie Brothers' "Wheel of Fortune" and "Takin' It To The Streets" - Steely Dan "Aja" no classical this round, we need to find some common performances we both know well. This round was time limited due to the desire to get the new toy set up and calibrated before LA traffic got sour (yes even in these COVID days it's bad). These selections played from CD (but "Aja" on SACD) via Oppo UDP-203's analog outputs. Volume was set moderately loud on the Dayton, then the output voltage measured with a 120 Hz test tone (1.400V). After the X3600H was set up (no Audyssey or EQ or anything), I set the volume to match (1.375V). So as you might expect, the Denon just killed the Dayton. Way more bass, so much more detail and image depth. OK, not really. The DTA-1 sounded very good! Nothing to fault, really and incredibly. If we tried to turn it up more than moderately loud, audio would start cutting out, which we assume is clipping. Refer back to the picture of the power supply, and maybe that's not a surprise. It would be really interesting to run this thing with a really massive 12V supply. Anyway at moderate volumes with the DTA-1 you could hear all the different instruments and bass lines delineated, imaging, depth. "Aja" in particular I use as a reference and didn't find anything obscured or lacking. Yow! My friend just wasted like $1200 with tax!!! Well, kinda. After the official testing, of course the Denon can play much much louder. And even at the same volume, the bass was firmer, the images deeper. OR were they? Ah, audio memory is so notoriously fickle. I shall someday have to figure out how to do this with more instant switching.