Product code: Audio Control online Model D-520 Subsonic Filter Equalizer
AudioControl Model D-520 Subsonic Filter Equalizer. Missing a couple of the little bumpers on the bottom. Just plugged in and turned on, that's the extent of the testing I online did.
AudioControl Model D-520 Subsonic Filter Equalizer. Missing a couple of the little bumpers on the bottom. Just plugged in and turned on, that's the extent of the testing I online did.