Description
Bassists chasing tube grit without giving up GK’s signature snap finally get their amp. The Fusion 550 pairs a six-stage all-tube preamp — three 12AX7s doing the work — with a 500-watt Class G solid-state power section lifted from the trusted 1001RB-II lineage. The result is that thick, harmonic push of valve saturation riding on top of the tight, immediate low end GK players have relied on for decades. Plug in and you’ll hear both worlds at once, not a compromise between them.
What sets this head apart is GK’s motorized knob system. You can dial in two completely different settings — say, a clean fingerstyle tone and a growling overdriven slap tone — and switch between them mid-song with a footswitch. It’s a first for a fully analog bass amp, and it means you’re not stuck riding a single EQ curve through an entire set.
The built-in 50-watt Horn Bi-Amp System keeps your tweeter-to-woofer balance locked in as you adjust master volume, so your top end doesn’t disappear or spike unexpectedly. Shape your tone further with the tube-driven 4-band active EQ and a contour control offering 500Hz-800Hz mid-frequency selection, plus deep/bright switching and a mute for silent tuning or changeovers.
Around back you’ve got the essentials for real gigging and studio work:
- Neutrik Speakon and 1/4
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