GB STM 900 bass head in perfect working condition--blue LED's work! 500W @ 8 ohms, 900W @ 4 ohms. 6-stage tube preamp has a nice round, warm tone, but delivers plenty of overdrive aggression with the Hi Gain setting, which Ed Friedland highlights in his review on the Youtubes. TBH while this amp is by no means transparent, Ed's review is a bit rock-heavy and doesn't demo the reggae, classic, fusion, ska, and other tones of which the amp is capable with an appropriately dialed gain. 3-band mid selector, Dual parallel Speakon connectors. Line-level aux and poweramp in; tuner, headphone, preamp, and balanced XLR out. Includes Gator carry bag. $550 shipped and insured to your door!