High-powered guitar amplifier using vacuum tubes, featuring a transparent tube view window. - Model Name: GrandMaster 36 - Color: Black - Features: Vacuum tube amplifier - Controls: Adjustment knobs for volume, tone, gain, etc. - Design: Transparent tube view window - Output: High output Thank you for viewing. I am selling this because I have purchased a Kemper. Sound check confirmed. Foot switch included. No claims and no returns, please. Price negotiations are welcome.