One of THE most musical combos I assembled was an AMC3030a integrated amp which used PP EL-34's and Acarian Systems LTD Alon 1's coupled with MIT2 Bi-wire speaker cables. The bottom octave was covered with a HSU Research HRSW12V sub which plummeted down to a full 16hz! X-over was set to 78hz/18db per octave on each side IIRC.
The above combo was magical in my ASC treated room but sadly, all the components can only be acquired on the used market and pickings are slim...
Some may say the AMC3030a was not the last word in resolution but it took on a much needed steriod shot when driven with balanced power.
Cheers