Parametric EQ w/tube essence, 2ch each with Gain, EQ, Freq, Bandwidth, Stereo or mono setup - Like New condition with box, packing, manual, etc. Decent design but the typical trouble which occurs is the controls age out badly, etc. They get loose and scratchy. I can fix this issue. I only sell low use things for this reason. Oddly not a lot of tube color in this design, the Aphex mic pre had more. I often refurbish old certain ADC, Sony, Radio Shack EQ, because of "cap and coil" design does effect vintage thickness (also because of single ended class A transistor design is like a tube character thing). If you need the best tube EQ, quality of controls, headroom etc., it's the ART Pro Channel (I own a few). 90db noise floor and it is really capable of wide or super sharp filters. It uses full size parts and pieces like old Yamaha and Tascam products. I can do a mod on this which allows honest variable tube harmonic level and phase. You can truly dial it in. See our ART Pro MPA Mic Preamp (has similar features).