A real sleeper, very powerfull bi-polar, hard to find in good nick, and can be cheap, because it’s not in audiophile circles. https://www.usaudiomart.com/details/649216490-yamaha-p2200-p2200-power-amp/
Get hold a good condition Yamaha P2200 a bias it up 2 x as much Class-A as they can take it, they made them for band use to be very rugged.
And they use the very best, expensive, Alps Black Beauty volume pots, so feed your dac direct in and use them, a killer linear power amp.
https://ibb.co/s5T05Z5
https://ibb.co/wWtwf4r
Cheers George