Audio manuals and audio service pdf instructions. Find the user manual you need for your audio device and more at ManualsOnline. DOD SR430QX DUAL Channel 15 Band Graphic Equalizer Balanced XLR & 1/4" outs - $45.00. FOR SALE! DOD SR430QX Dual Channel 15 Band Graphic Equalizer BalancedView and Download DOD SR 231QX, SR 430QX, SR 431QX, SR 830QX, SR 831QX owner's manual online. SR Series Equalizers. SR 231QX, SR 430QX, SR 431QX, SR 830QX, Owner's Manual SR Series Equalizers • SR 231QX • SR 430QX • SR 431QX • SR 830QX • SR 831QX A Harman International Company A high-resolution real time audio spectrum analyzer (such as DOD's SR Series RTA ) is a very use- ful tool when setting up a 1/3rd octave graphic equalizer to