Three RCA inputs for various audio sources such as DVD player, TV, CD player, tuner, etc. A 3.5mm mini jack socket on the front plate allows for the connection of an MP3 player, laptop, desktop and more. The bright blue integrated LEDs make the amp look very cool in any rack mount. The powerful amp with cooling fans and clip indicator LEDs help you to ensure long lasting top performance. Features. SPL Audio ClassA/B 4 Channel Amplifier. 1300 Watts RMS/2500 Watts MaxSpecifications. High Pass Crossover Variable 60 1.2kHz. Low Pass Crossover Variable 50 400Hz. Bass Boost Selectable 6dB/12Db. Frequency Response 15 20kHz. SignaltoNoise Ratio 105dB. Input Sensitivity 200mV6V. Wattage 2500 watt. Weight 6.45 lbs SPL Audio Class-A/B 4 Channel Amplifier 1300 Watts RMS/2500 Watts MaxSpecifications High Pass Crossover: Variable 60 - 1.2kHz Low Pass Crossover: Variable 50 - 400Hz Bass Boost: Selectable 6dB/12Db MODEL NO - SPL25004