Found this older thread and decided to post here trying to revive it so I could get some info.
I just purchased an used P6/A23+ combo, and I was wondering the same thing. My sweet spot on the volume knob is 65, beyond that, my wife comes yelling at me. I mostly listen to vinyl through a Rega Planar 6 w/ a MM cartridge.
My "issue" so far is with the tone controls. For the style of music I listen to, which is mostly Rock/Metal, Hip-Hop, etc., I need the extra punch and mid range. So, in order to enjoy the sound on this pre+amp, I need to crank up the tone controls to almost the max levels. Is that normal? I'm powering a pair of KEF's Q550 with them.
I don't mind if I do have to set the tone controls to my liking, I am liking the sound I'm getting so far. I'm just wondering if that's normal. Also, it could be my speakers, or the interconnects I'm using (stock RCAs between the TT and the Pre, and between the pre and the amp)