QSC GXD 4, installation depth: 259 mm ightweight : 5.1 kg, 2 x 600 watts into 4 ohms, Hi-Peak performance: up to 1,600 watt, Class-D amplifier circuit, Large 256P x 128p LCD display, illuminated 2 input knobs and 3 buttons for quick access, DSP functions: High-pass filter, 4 - th order Linkwitz-Riley, adjustable frequencies 20 Hz to 4 kHz, low-pass filter, 4 - th order Linkwitz -Riley, adjustable frequencies 60 Hz to 4 kHz, 4-band parametric EQ with frequency, gain and bandwidth variable, peak limiter: protects speakers by inputting individual performance and impedance data, Delay:. a maximum of 50 ms, Digital Gain: + 10dB / -100 dB, 20 presets / presets for most popular speaker configurations, set, status - LEDs: 2 x green: Signal, 2 x red: Input / Amp Clip / 1 x blue: power, inputs: 2 x XLR and 2 x 6.35 mm stereo jack, outputs: 2 x NL4, lockable (NL2 compatible) and 2 x Screw, mono- or bi-amp connection, protection circuits and thermal fuses, PSU protectef against instable power supply, removable power cable ( C13 / Schuko) Dimensions W x H x D in mm: 483 x 89 x 259 mm, 19 "- 2U