Hartke HA3500 bass amplifier. Functionality confirmed. *Checked at home using line output as I don't have a cabinet. *Not tested with active input. *No manual included, power cable included. *Will be shipped in a soft rack case. Used mainly at home, but also used a few times in studios and live performances. As far as I can tell, there is no crackling, and all switch lamps are lit. The leftmost knob (30Hz) of the equalizer is missing. A substitute black knob will be attached before shipping. The specifications are as follows: ↓↓↓ HA3500 model with 350W output, a bass amplifier equipped with tube and solid-state preamps. - Model: HA3500 - Output: 350 W - Input Type: Passive/Active - Preamp: Tube/Solid-State - Graphic Equalizer: Equipped - Controls: Low Pass/High Pass/Volume - Switch: Power Switch Thank you for viewing.