Amazon.com: Professional DJ Mixer, Phenyx Pro Sound Mixer w/ USB Audio Interface, 4-Channel Sound board Audio Mixer w/ Stereo Equalizer, 16 DSP Effects, Ideal for Stage, Live Gigs, and Karaoke (PTX-15) :
Amazon.com: Behringer ULTRAGRAPH PRO FBQ3102HD High-Definition 31-Band Stereo Graphic Equalizer with FBQ Feedback Detection System : Musical Instruments