The Pyle PLA2678 2-channel, 4000-watt power supply is bridgeable. It's equipped with everything you've come to expect from quality car amplifiers. The RCA ports are silver-plated for eliminating signal loss. A subsonic filter allows low-end interference to be cut, so your speakers will always be delivered the highest quality audio. The MOSFET pulse width modulation power supply allows for a clean, distortion-free signal to your speakers. To keep both your car and the amplifier safe, this model is equipped with thermal, overload and short circuit protection.