Th 120 have double the power of the 88. 120 Watts vs 60 Watts I belive. Did you listen in Ultralinear or Triode. Triode on the 88 is 30 Watts, I used them on a pair of 92dB speakers with great succes, then got 120 and Know the 150.
Last amp I will need.
Last amp I will need.