Our flagship equalizer, the SR231 QXLR combines two constant Q, 31-band, 1/3 octave equalizers into a two rack space steel chassis. The back panel boasts XLR, and 1/4 inch connectors. With a fully shielded internal power supply, and unsurpassed specifications, the SR231QXLR is the perfect choice where ever stereo, or dual equalizers are needed.