Quote Originally Posted by harley .guy07 View Post
You might be on to something there. I do remember the bass on my class d audio amp was very good and controlled. It might be the best of bothy worlds to put the Forte up top to get the grain free smooth top end and put the class d on bottom to get the bass that those are known for.
So I tried passive biamping my Magneplanar MG 1.6QR's with the Forte 5 on top and the Class D Audio SDS-258 below. Note the the cross over is a rather low about 600 Hz. I was able to use my Dayton Omni-Mic system and the SDS' input pots to equalized the amps' output.

Unfortunately the results were quite disappointing. The SDS restored the tight, controlled bass and the PRaT, that is, stored most of the "life" to the sound. The Forte ensured a mellower high top end than the SDS along. However the most of the midrange and low top were a complete disaster: the sound of brass instruments was tinny and that of strings just plain weird -- this despite that I used the Electri-Q equalized to yield a measurably smooth, flat response. (As usual I roll off the highs smoothly starting at about 4k Hz, down about 5 dB at 10k Hz.) Basically the mids and highs were kind of the worst of both worlds.