RANE RE 27 REAL TIME 27 BANDS EQUALIZER RACK MOUNT POWERS ON UNTESTED

InterM EQ 9231 Graphic Equalizer 2 Channel 31 Band TESTED AND WORKING

Samson 131 - 31 Band Equalizer

ART HD-31 High Definition EQ Model 350 1/3 Octave Graphic Equalizer Work Great

ROLLS REQ-131 GRAPHIC EQUALIZER 31-band made in USA.

dbx 215 Professional Products Dual 15-Band Graphic Equalizer Rack Mount

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

Alesis M-EQ230 Dual 1/3 Octave Precision EQ Equalizer