QSC GXD4 Class D Power Amplifier with DSP High peak output power with up to 1600 watts Class D output stage with a universal power supply for high performance and efficiency Includes high and low-pass filters, 4-band parametric EQ, limiting, and delay Parallel XLR and 1/4 TRS connectors for compatibility with any source while providing convenient loop-thru capability Professional binding post and NL4 connectors (compatible with NL2) provide for mono and bi-amp speaker connections