I'm driving Elac UniFi 2.0 bookshelves with the A07. Initially, using the default PSU (32V 5A) I was hearing surprisingly harsh sound. No matter what settings I tried, I was getting terrible fatigue after even short listening periods. After seeing so much praise for this little amp I was pretty disappointed. Then I swapped the PSU for a Meanwell 48V 7.3A and all of the problems disappeared. Honestly I was shocked at the change. It sounded wonderful, non-fatiguing and balanced to my ears. My conclusion is that the ELACs were underpowered and distorting until I upgraded the PSU on the A07. I have no measurements. Just my ears and experience. So take it for what it is. Not Audio Science. My question for the Audio Scientists here is: Has anyone has actually measured the Wattage Output this amplifier is sending to speakers when it's PSU is 48V 7.3A? Cheers
That the sound turns from harsh and terrible fatiguing to wonderful and non-fatiguing with this change is seriously strange. How loud are you listening that the 77 Watts/4Ohms with the 32V 5A power supply of the A07 are not enough? What if you listen to lower volumes. Still the same difference?