QSC GXD 4, Power Amplifier, Very low installation depth: 259 mm, Power: 2x 800 W into 8 Ohm, Hi-Peak power: up to 1,600 W, Class-D power amplifier circuit, Large, illuminated 256p x 128p LC display, 2 Rotary input knobs and 3 buttons for quick access, High-pass filter, 4th order Linkwitz-Riley, adjustable frequencies 20 Hz to 4 kHz, Low-pass filter, 4th order Linkwitz-Riley, adjustable frequencies 60 Hz to 4 kHz, 4-Band parametric EQ with frequencies, Gain and bandwidth variable, Peak Limiter: protects speakers by entering individual power and impedance data, Delay: maximum 50 ms, Digital gain: +10 dB / -100 dB, 20 Presets for the most frequently used loudspeaker configurations, adjustable, Status LEDs: 2x green: signal/2x red: in-amp clip/1 xblue: mains power, Inputs: 2x XLR and 2x 6.35 mm stereo jack, Outputs: 2x NL4, lockable (NL2 compatible) and 2x screw terminals, Mono or bi-amping connection, Protection circuits and thermal fuses, Power supply fused in case of unstable power supply, Detachable mains cable (C13/grounded plug), Dimensions (W x H x D): 483 x 89 x 259 mm, Construction: 19"" / 2 U, Weight: 5.1 kg