Granted what I'm relating to you is regards to bridged integrated amplifiers but it may apply. I had a single Pathos Classic MK III and it sounded quite good but I read that a bridged pair took a sonic leap forward and the single amp really was on the weak side at 70w/channel. I bought another and bridged accordingly and indeed, most of the sonics improved. Immediacy was the most obvious as sounds were now more forward and easily discerned. Dynamics improved as well. My only complaint was that I felt the soundstage wasn't as deep. The fellow that turned me onto bridging the Pathos amps suggested I try the same with the Cambridge Audio 840W. I did have this amp but never got around to bridging them but heard the improvement was also obvious. The answer to your question may well depend on the amps.