Sony XM-N1004 4-Channel Stereo Car Audio Amplifier (Black)

Automatic Thermal Control : High temperatures can have a negative affect on amplifier components, often causing the amp to shut down until it returns to a cooler temperature. Automatic Thermal Control lowers the amp’s output, so you won’t ever need to worry about the amp suddenly cutting out. Stay cool : The amp’s design maximises air circulation within the unit, allowing it to remain cool while reproducing stable, powerful sound that’s free from distortion. High-quality components : The Stereo Power Amplifier utilises high-quality audio capacitors, output transistors, and choke coils to ensure true, reliable sound reproduction. Low Pass Filter (LPF) : Music sounds better when the correct frequencies are channelled to the right parts of your speakers. The built-in LPF ensures that only deep bass sounds are directed to your subwoofer. High Pass Filter (HPF) : Like the Low Pass Filter, the HPF ensures that everything but the deepest bass notes are directed to your full-range speakers.