Bridging Amps for Subwoofers

I think it is important to use a high current amp that easily doubles into 4 ohm loads. Most subs have pretty nasty low impedance characteristics. I doubt that the manufacturer recommends 400 watts @ 8 ohms. Since you are not using the amp in a "full range" application, you do not need to spend big bucks so long as it has sufficient current and handles the impedance dips.

Bridging does not half the current. Read a recent thread entitled BIAMPING under Speakers.

Make that "halve". Thank you. :)