One of the best-selling car audio brands over the past few decades has been Alpine. Alpine produces a wide array of car audio equipment, including amplifiers. One popular amplifier model by Alpine is the MRV-F400.
The MRV F-400 RMS power at 12 volts, 20-20k hz produces 40 watts per channel into 4 ohms, 20 watts per channel into 2 ohms. The bridged dual channel into 4 ohms is 100 watts.
This amplifier has numerous features including 4/3/2 Channel Operation, multimode function, no current limiting, STAR circuitry, input mode selector, gain control, hidden output circuitry, gold-plated connectors and screw-down terminals, PWM (pulse width modulated) power supply and LED status indicator.
The dimensions of the MRV F-400 are 12 inches wide, 2 1/2 inches high and little over 9 inches deep. The overall weight is between 4.08 and 4.99 Kilogram, depending on the mounted hardware.
The MRV F400 manual can be downloaded at Manuals and Guides (see Resources). Also, the MRV F401 uses the same schematics and this manual can be downloaded at Reviews and Opinions (see Resources).