JBL Concert A704

Concert sound for your car - The JBL Concert A704 delivers 280 watts RMS and 1000 watts Max, and is a fantastic upgrade to your car sound system
The high-efficiency Class AB 4-channel amplifier combines the advantages of Class A and Class B for a very high sound quality, so it is not only powerful but also very reliable.
Concert series amplifiers have adjustable High and Low Pass filters that allow you to adjust the frequency from 40 Hz to 400 Hz.
Automatic power-on: The high-level signal input automatically turns on the amplifier when DC voltage is detected, and the line signal input turns on the amplifier when a 12 V signal is detected.
Reliable performance:
Harman Kardon amplifiers must pass a rigorous testing process that would destroy an unstable car power amplifier. JBL subjects them to the most intense cold, high heat and shock, irradiates them with UV light and runs them at full power for days.

Specifications:
4-channel Class AB amplifier
Rated Power RMS Output: 70W x 4 @ 4 ohms; 90W x 4 @ 2 ohms; 180W x 2 @ 4 ohms bridged, <1%THD
High and Low Pass Filters: 40-400Hz, 12dB/octave
SN Ratio: (1W @ 4 ohms): >75dB
Frequency range: (-3dB):10Hz - 45kHz