The Behringer DEQ2496 Ultra-Curve Pro can be used to apply DSP to your system. It has balanced input and outputs, I am including one pair of RCA to XLR interconnects. Probably you will need a pair of RCA to XLRs or make up a 2nd pair of interconnects. I have used this unit to apply DSP to my bass amplifiers/speakers. It is very effective indeed. Street price for the DEC 2496 is around £215, you can have mine for £130 + P&P. It is in good condition, it has some scratches underneath but these will only be visible to your rack! [URL]http://www.enjoythemusic.com/magazin...acurve2496.htm[/URL] [URL]http://www.behringer.com/EN/Products/DEQ2496.aspx[/URL] [URL]http://www.andertons.co.uk/PA-Outboa...acurve+Pro.asp[/URL] SOLD