POWERBASS XEQ-9XOPOWERBASS XEQ 9XO Equalizer The XEQ 9XO 4 Band Equalizer and Pre Amp is the perfect solution to take your sound system from good to excellent by giving you 9 EQ controls, subwoofer volume & crossover controls, fader and multiple inputs. Most all of us have multiple musical tastes and each one of them require different listening desires. By having the ability to set different EQ settings gives us the ultimate control over the sound reproduction and