Need more specifics. Need to know the model number of the sub or at very least make/model/size OR rms output and what resistance.
To sort of answer your question, I'm assuming that's 400w peak power. That's probably 100w RMS at 4 ohms. In which case, pretty much any amp you find will max that sub out.
yes/no
yes but the sound quality aint good enough :)
The Rockford Fosgate Punch 400-Watt Mult. offers a very good subwoofer output. You can also try the Boss CX1100M.
The MTX Audio Magnum MB212P 1000 Watt 2-12" Subwoofer Box w/Car Amplifier is a good one to start.
Yes should be fine.
Technically, yes. Practically, no. Amplifiers and speakers are rated by the maximum amount of power (and at what impedance) they can handle. A 1200 watt amplifier will eventually destroy a 1000 watt speaker if it is operated at maximum power. In normal use, however, you rarely even get close to maximum rating.
For optimal performance, match the amplifier's power output to the rating of your subwoofer. The Rockford Fosgate 12" starts at a 150-Watt rating.
A Rockford 250 watt amp would compliment a 12" Subwoofer very nicely.
Yes
Take a good 100 watt amplifier. Don't look for one with an output impedance of 4 ohms. All amps have output impedances of less than 0.5 ohms, because we use voltage bridging and not power matching.
biggest u can afford!
In watt watt watts