1, the car amplifier for home use, simple is to buy a single output 12V DC power supply, power in more than 50W, power supply positive terminal connected to the amplifier's +B and REM, the negative terminal connected to the amplifier's GND.
2, if you will be the circuit, you can remove the amplifier's single-supply into dual-supply step-up circuit, directly with a dual-supply +/-30V for the use of amplifiers.
3, power power power! The best in more than 100W.