The Q700 is not nearly as good as the Q900, which is a truly outstanding speaker.
When I shopped about a year ago for speakers for a new home, I narrowed it down to the Q900 and the PSB Image T6. I went 3 times to listen to each one of them , and finally decided that the overall sound quality of the T6 was better, but it was a very close call. Anyway, I bought the Image T6 speakers, and I am sure glad I did. They are excellent, and a bargain for the money.
Any way you look at it, they are probably the two best speakers in the $1200 to $2000 price range, so far as I could tell from my listening. I also was interested in the Dynaudio Excite X32 speakers, but couldn't find a dealer any closer than San Francisco that had them.
In any case, if I were you, I would assume that your main problem is the Yamaha amplifier. I am 98% certain that is the case.
I would get an Onkyo 709 and an Emotiva XPA-3 amplifier and see what those Kappa speakers will do with some decent electronics. They may surprise you.
BTW- In the early 1980s I bought a Yamaha 125-watt integrated amp for $800. It had problems with breaking up badly when pushed hard. I replaced it with a NAD 3020, which cost me $200 and sounded much much better and would play very loud with my 4 ohm speakers; much better in every respect than the Yamaha.
Garbage in, garbage out. That applies to almost any speaker.
Originally Posted by cream puff
that is the only bad review I've seen on any speaker in the Q lineup, including other reviews of the q700s.. id put money on they had something set up incorrectly or maybe an unfavourable listening environment.
the common thing I've heard about the Q series, is that they are VERY accurate to the point of being a bit unforgiving to any sub par component that may be hooked to them, if you don't have a good quality amp/source etc you'll definitely hear it with these, and i can vouch for that personally with my previous setup i didn't hear a big difference in quality between sources (say flac to mp3 for example) with the Q series, there is a very significant difference.. i would expect that is the case here.
heres a review of the q900s from stereophile..http://www.stereophile.com/content/kef-q900-loudspeaker