How about....... bring out the best the speaker has to offer. I think even Pass Labs would acquiesce and "say the X-600.5 would be a better match for some".. ie, B&W 802D etc. I'm sure there are many other designs that prefer more push/pull s.s.amps or big tube amps( like 100 watts a channel)but do they sound better?
So how about a list of the worst of the best speakers to be paired with the XA-160's, I hope you understand, We want to match these wimpy 160 watt class A mono blocks with a speaker that just will not upen up and speak pure music to YOU under such under powered conditions.