The PWMA3003T Pre-Amplifier adopts the most advanced digital technique in the world. It is 4 channels with its high power output, so to speak, the real acoustic centre of your family movie theatre. It is designed to be multi-functional w/ AM/FM Tuner, Mp3/Ipod input jack, headphone input jack. It is a product of the finest accompanying acoustic amplifier, when applied to TUNER, USB, MP3, VCD, DVD etc. The PYLE PRO brings you the first ever Hybrid Amplifier with designed Sub out and Pre out to adjust to every situation.