What other solution is there, if you insist on biamping a subwoofer? Head
unit filtered outputs? Not all heads have them.

There isn't one.


That's why I never biamp a sub. I can't think of many reasons why you would
have to, unless you're into some really exotic dB drag stuff.


I'll give you a very good reason, Price unless you are lucky enough to buy
everything new. If you buy your amps used as I do, you will find that a pair
of 500watt amps are a lot cheaper and easier to find then a single 1000watt
amp. For that reason I am bi-amping a pair of mtx801d's to four 12" subs at
this time.

Where does the airy nature of the sub amp, the high damping factor, the
warmth of the sound, and the precision of the control of the cone come into
play?


When bridging, although I have never found it to be that noticeable to the
ear.