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, you can use a 600 watt amplifier with a 500 watt subwoofer. It is important to ensure that the amplifier's output power does not exceed the subwoofer's power handling capability to avoid damaging the subwoofer. It is also recommended to properly set the gain levels on the amplifier to match the subwoofer's power handling.
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, a Planet Audio 800-watt amplifier can push a 12-inch 1300-watt Pioneer subwoofer or a 12-inch 1200-watt Sony Xplod subwoofer, but it may not fully utilize their maximum potential. The amp's power rating indicates its ability to deliver sound, but the subwoofers can handle more wattage, which means they may not reach their fullest performance. It's important to ensure that the subwoofer's impedance matches the amplifier's output for optimal sound quality and efficiency.
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.