Devsung:
The Matrix 802 S2 need current drive for dual woofers, voltage drive for the fabulous mid, so the amp/integrated has to have muscle. But, these speakers are also quite efficient and can be driven well with 30watts or so. But, as the speakers are "monitor" class, they will not forgive the entire audio chain. For, e.g. if your source component/s are not upto the mark, The B&W will show it. The same stands for preamp, power or integrated. The common complaint is that it sounds harsh and bright. This speaker is far from that. This speaker needs huge care. I own the Matrix 801 series 2 and Matrix 802 series 2 and mostly use the 802 in a room of size 13 x 14 ft (smaller than yours). After searching for the so called "correct" amp for these speakers for the last 7 years, yes, Krells, Levinsons, Rowlands, Audio Research, Chord, CJ, I've found the PassLabs "Aleph" range of amplifier to best suit this speaker. But, caution - there are 2 types of Aleph amps. One with only 2-stage amplification and the other with 3-stage amplification. I can strongly recommend the Aleph 5 (60 watts per channel) stereo pwr amp for your requirement although I use the Aleph 1.2 rated at 200watts monoblocks. The reason why I feel the 60 watter is a good match is because the 200 watts monos heat up like hell and incase you are in a hot climatic region, its going to get very difficult to listen to music. You can find Aleph 5 in Audiogon under $2k, more towards 1.5k and this in my opinion is a superb match to the 802s. Interconnects I use are ofcourse Cardas "golden reference" with the same as powercords. Should you require any help, pls do not hesitate to get in touch.