Your amp puts out close to 130 watts when driven out of class A. That's sufficient for nearly all bookshelf type loudspeaker at reasonable levels.
Need suggestions on efficient book shelf speakers for a Pass Labs XA3.5
*sorry amp is XA30.5 -will not let me edit headline.
My current speakers are KEF 201/2 which have a low sensitivity of 85. Amp is only 30 watts class A. Sounds good but the volume is limited. Hoping more efficient speakers will provide greater volume? Looking for suggestions in the $2k -4k used or $3k- 8k new.