Ross Systems RX-15S 2-Channel 15-Band Rackmount Graphic Equalizer EQ

Ross Systems RX-31M 31-Band Graphic Equalizer Rackmount PA EQ

DOD SR430Qx, Stereo 15 Band Graphic Equalizer, Eq, Rack - (Not Tested)

DOD SR231 QX Dual Channel 31-Band EQ 2U Rack Mount Graphic Equalizer

Samson S Curve 215 Dual 15 Band Graphic Equalizer

DOD R831B 31‑Band 1/3 Octave Graphic Equalizer Rackmount EQ - Tested