Hello, I have an unusual problem with my system that I have tried desparately to figure out to no avail. If I can't get it resolved soon, I think I am going to just sell my equipment to save myself any more aggravation. Let me explain: I currently have Paradigm Reference studio 40 speakers and a Denon PMA-2000IVR integrated amp biwired with Synergistic Research Alpha speaker cable. I can never get consistent sound out of my system. In fact, most of the time it sounds like crap. On the rare occasions it sounds good, I get excellent imaging, great dynamics, bass, detailed midrange, etc, but most of the time my system sounds flat, no midrange, nonexistent imaging(in fact, it just sounds like two speakers outputting sound, almost like its in mono), no dynamics, and a big drop in power. The Denon is a powerful amp, when it sounds good, It only needs a quarter turn to get loud but most of the time, I can turn it to the 1 o'clock position and it isn't very loud. Now, before this amp, I had (and still have) a Carver stereo receiver, and an Integra 5.3 home theater receiver which both exhibit the same symptoms as my Denon. I have ruled out the amps since they all do the same thing. It's not the speakers, since my previous Klipsch RF-3's did the same thing my Paradigms do now. I have tried different cables, line conditioners, etc with no luck. I thought maybe it is a voltage problem but I have a Panamax 1000+ which always reads 120 volts and a Monster 3600 line conditioner which also reads 120 volts consistently. When things sound good, everything sounds good (CD, DSS, VCR, DVD, etc.) so it isn't any one source. The thing that is so frustrating is getting a glimpse of how good things can sound, only to have it all go away the next day. I thought It was just my imagination, until a friend was over and my system just happened to go from sounding bad to good and he immediately noticed the difference without me saying anything. It can go for a month or so sounding flat and lifeless and then suddenly for a couple of days sound good and then go back to sounding bad. I am pretty desparate at this point and would greatly appreciate any advice anyone can give. If I can't figure it out, I'm going to sell everything and get the hell out of this frustrating hobby! Let me tell you, nothing is more frustrating than spending a good sized amount of money for a stereo that does't sound much better than a boombox most of the time!