No two rooms sound the same. Ensure youll get a great sound whatever the sonic environment with a dbx 1231 Dual 31-Band Graphic EQ. Youll have granular control of your sound thanks to the 31 bands per channel offering ±15dB. Get startling audio clarity with less than 0.005% total harmonic distortion. Youll be able to shape your sound without adding any extra noise. For wider adjustments you can set the adjustment range to ±15dB or for more precise changes you can change it to ±6dB.