Amazon.com: EMB EQ76 19'' Rack Mount Dual 15 Band 4 Input Stereo Graphic Equalizer Pro DJ with 2 RCA line input and output, Removable Rack Mount Brackets and 110V/220V Switchable Power Source :
The Complete Guide To Graphic Equalization/EQ – My New Microphone
MR DJ DEQ500 19" Rack Mount Pro Dual 10 Band Stereo Graphic Equalizer – Mr Dj USA