Description
Bassists who’ve hauled a tube head across a parking lot know why the MB Fusion 800 exists. GK took the tone-shaping DNA of their MB series and dropped it into a Fusion preamp built to add warmth and grit without the tube-amp weight penalty — this thing checks in at under 8 lbs, yet it drives 800 watts through the same FET-based circuitry GK has trusted for over three decades.
That FET stage isn’t just marketing talk — it’s the same tech behind GK’s famous boost circuit, now running through every gain stage, the four-band active EQ, and the Contour control. The result is an amp that goes from clean and full-bodied to full GK growl with a twist of the knob, so you’re covered whether the gig calls for round and warm or aggressive and cutting.
Every control lights up to tell you what’s happening on stage — input clip, tuner mute, Gain A, Gain B/Level-B, power amp clipping, limiter, and EQ/Contour status — so you’re never guessing under stage lights. Plug into Speakon outs for your cabs, grab a pre/post EQ signal off the XLR for FOH, or run headphones/line out for silent practice. A footswitch jack, effects loop, and tuner mute round out the practical side of things.
- Digital power amp — 800 watts
- 4-band active EQ
- Speakon outputs
- Selectable headphone/chain/line output
- XLR output, switchable pre/post EQ
- Footswitch jack, effects loop, tuner mute
Built by a name bass players have trusted for their signature sound for decades, the MB Fusion 800 is a serious head for anyone who needs real power without the load-in workout.
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