Ampeg SVT-3 PRO Bass Amplifier (Head) Made in USA I've taken good care of it, so it's in beautiful condition, I think it's quite clean. I hope you can examine it thoroughly in the photos. I've also taken pictures of the inside. A hybrid bass amplifier combining vacuum tubes (Tubes) and solid-state (Mos-Fet). The traditional SVT sound with 450W of high power. This model is a classic. A completely analog amplifier made in America, so it has a bass-like sound. You can also distort it. It also has a graphic EQ, so you can create a wide range of sounds. It has DI out, line out, tuner out, effect return, etc., so it's a convenient amplifier for use with in-ear monitors. I bought it to combine with the classic 810 speaker, which produces a driven, punchy, and great sound, but I'm selling it to organize my equipment. *Please purchase only if you understand that this is a used item. *No crackling, operation confirmed. *No instruction manual or box. *Belden speaker cable included. *Power cable included. *Will be carefully wrapped in bubble wrap and shipped in a cardboard box. The multi-functional SVT-3 PRO bass amplifier, rack-mount design, adjustable frequency. - Model: SVT-3 PRO - Input jacks: 1/4 inch jack - Adjustable features: Gain, Bass, Midrange, Treble, Master, Tube Gain - Frequency adjustment: Frequency adjustable sliders - Design: Rack mount design - LED indicators: Peak indicator Thank you for viewing. (Product management number 101)