Pass Labs - 350.8 stereo vs. 260.8 monos


I have never owned Pass labs amps. However, someone as successful at designing/manufacturing Class A and AB amplification over the long haul as Nelson Pass has to be close to perfecting their craft. I prefer mono amps for the usual reasons but am not against a great-sounding stereo amp. I currently own big Class A mono amps as well as a Class AB stereo amp and based on my listening experience I believe there are sonic trade-offs that make both Class A and Class AB amplification attractive for different reasons.

I am curious about the sonic differences between the Pass X350.8 and X260.8 monos. I noticed with the exception of the obvious power differences, the two amplifiers (and all the amps in the P8 line) have similar specifications. A couple of differences in specifications that stand out to me between the 350.8 and the 260.8s are maximum current (35A vs. 28A) and the wattage at which the amplifiers leave Class A and transition to Class AB (18wpc for the 350.8 and 34wpc for the 260.8s). In this area, the big X600.8 monos seem to be the best of both worlds as they do not leave Class A until 100wpc! I just don’t need that much power.

Although I found a review of the X250.8 stereo amplifier, I cannot find anything on the X260.8 monos so I am hoping some of you have auditioned or own the 260.8s and/or 350.8 and can share your impressions and maybe comparisons to the P5 line or comparable amps by other manufacturers. Thanks for any insights.
mitch2

Showing 3 responses by karmapolice

I am auditioning the Pass Monoblocks 260.8 and sounds very promising with the Harbeth 40.2 speakers giving them the power that they need and bass I didnt know the speakers could get.  As for its musicality that is the most subjective aspect of the audition and am trying various preamplifiers to determine if it has that specialness for my room......so far looks like a keeper..
I am auditioning the pass labs xp-22 and xp-12 to hear what an all pass system sounds like......I like the xp-12 but the xp-22 is easily better.....there must be a better combo out there than the xp-22 and 260.8 but not sure can be had without spending more perhaps much more......this just sounds so right....radiohead sarah vaughan david bowie john coltrane miles davis all sounding glorious on vinyl.....
If you never hear the xp22 you will be very happy with the xp12....however the xp22 just sounds a little better in every way .....imagine a good pair of shoes versus your most comfortable.....

I didnt want a two box preamp....I wanted a one box preamp with phono built in but cannot deny I now finally love the harbeth 40.2 ....