Description
The MB800 is the amp that proved you don’t need to haul a fridge-sized head to shake a room. This DEMO unit delivers everything that made the MB series a staple on bass rigs everywhere: massive headroom, unmistakable GK growl, and a build so light your back will thank you at every load-in.
Under the hood, GK’s discreet FET-driven preamp runs the same field-effect transistor technology behind the legendary G.I.V.E. boost circuit that’s defined Gallien Krueger tone for decades. That means every gain stage, the four-band active EQ, and the variable Contour control all respond with that touch-sensitive push – clean and warm when you back off, snarling and aggressive when you dig in.
Status lighting across the front panel keeps you informed at a glance – input clip, tuning mute, Gain A, Gain B/Level-B, power amp clipping, limiter, and EQ/Contour settings are all illuminated so you’re never guessing mid-set.
- 800 watts @ 4 ohms or 500 watts @ 8 ohms
- Discreet FET preamp
- Push-activated Gain A/B and limiter defeat
- 10dB pad
- Four-band active EQ w/ variable contour
- Effects loop & tuner mute
- XLR out, switchable pre/post EQ
- Defeatable limiter
- Two Speakon outputs
- Headphone/line output
- 10.75 x 8.5 x 1.75 in
- 4.9 lbs.
This is a demo unit – fully functional, previously used for demonstration purposes, offered at a value price for bassists who want the real deal without the retail markup.






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