My search for a new speaker system has ended.
I had a set of M&K 150s (S-150thx fronts, SS-150thx surrounds, and MX-150thx sub) on loan at my home for a short time, and while I was happy with their performance on movies their sound was very two-dimensional when used for 2-channel music. Furthermore, the sub did not integrate seamlessly with the fronts when used for music.
Based upon positive comments that I read on this site about Triad speakers, I jumped at the opportunity to buy a complete used Triad system consisting of Triad InRoom Gold LCR, Triad Gold InRoom Center, Triad Gold OnWall Surrounds, and a Triad Platinum PowerSub. This was really risky as I bought the system from across the continent, sight unseen, and with no previous personnel experience with Triads (there is not local dealer where I live). Am I ever glad that I took the chance. The speakers were in perfect condition, have awesome build quality, and sound superb.
The LCR and Center speakers form a seamless blend across the front, the surround speakers are non-localizable (I checked the speakers more than once to make sure they were operating), and I defy anybody to be able to tell where the subwoofer is located. The speakers are very neutral sounding. They are much more detailed than my previous speakers (Energy C-8s, AC300, and RVSSs) which were quite bright sounding. In two channel mode, the Triads also image very well, and are better than any other speakers that I have listened to (Aerial, PMC, Kef, etc.) when it comes to vocals. The subwoofer is superb. Once I had the system properly calibrated, it was impossible to localize the sub. The sub is very detailed and tuneful. The dynamics of the system are incredible. There is not a trace of compression as the volume is turned up. The other night I watched Jurassic Park in DTS at THX reference level. This is REALLY LOUD. I half expected to be hit upside the head with a flying woofer cone, but this fear was completely unfounded. There was never a trace of distortion. Normally I watch movies approximately 10 db lower than THX reference level, but my wife was out and I had a hankering to see what the system could do.
These speakers will be staying with me for a long, long, long, long time. For movies they are better in every way than the M&K system that I tried, and for music they are more detailed, neutral, and focused than my old Energy C-8s. The Triad Golds are truly a system that is equally exceptional with music as they are with movies.