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Gallien-Krueger Fusion 550 Hybrid Bass Amplifier Head

The Gallien-Krueger Fusion 550 Hybrid Bass Amplifier Head offers signature GK tone and performance, a tube-powered pre-amp, plus loads of professional-grade features.


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MSRP: Old Price $1,717.85 Discounted Price $1,199.00 Save : $518.85 (30%)
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MSRP: Old Price $1,717.85 Discounted Price $1,199.00 Save : $518.85 (30%)
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The Gallien-Krueger Fusion 550 incorporates a unique six stage tube pre-amp paired with a high current solid state power amp. The rich warmth of tubes, combined with the quick, punchy power section that GK bass amps are known for is an experience like no other. In addition, GK takes the next step in innovation by adding motorized controls which allow you to store two different settings that can be recalled via the included footswitch.

The Gallien-Krueger Fusion 550 delivers a massive 500 of power at 4 Ohms (350 watts @ 8 Ohms) and features a unique 50-watt horn bi-amp system with a dedicated control knobs to dial in the level of the horn when you're in bi-amp mode. The pre-amp is powered by a trio of 12AX7 tubes for that classic tube warmth and richness. For superior sound-shaping capabilities at all frequencies, the Fusion 550 sports an active 4-band EQ (Bass, Low-Mid, High-Mid, Treble) as well as a Shaping section that consists of a Bright switch, a Deep switch, and a Contour control knob that works in tandem with Mid Frequency switch. Other pro-grade, premium features include an Effects loop for use with external effects, a Tuner output with mute switch, Speakon & 1/4" outputs, and an XLR output with a Level control, Ground Lift switch, and Pre/Post EQ switch.

Get your Gallien-Krueger Fusion 550 Hybrid Bass Amplifier Head today at the guaranteed lowest price from Sam Ash Direct with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Bass Amplifier Head
  • Footswitch


by PowerReviews
Series Fusion
Model Fusion 550
Amp Type Hybrid
Channels 2
Watts 500 (@ 4 Ohms), 350 (@ 8 Ohms)
Other Features High Current Solid State Power Amp with Tube Pre-Amp Powered by (3) 12AX7 Tubes

50-Watt Horn Bi-Amp System

Motorized Controls

Input Section: 1/4" Input, Active/Passive Switch, Channel Select Switch (Selectable via Included Footswitch), and Gain Control Knob

Shaping Section: Variable Contour Control with Mid-Frequency Switch, Bright Switch, Deep Switch

Active EQ Section: Bass, Low-Mid, High-Mid and Treble Controls

Output Section: Horn Bi-Amp Level Control, Master Volume Control, and Mute On/Off Switch for Tuning (Selectable via Included Footswitch)

Tuner Output

Effects Loop

1/4" and Speakon Speaker Outputs

XLR Direct Output with Ground Lift Switch, Pre/Post EQ Switch, and Level Control Knob
Weight 25 lbs.
Dimensions 19" x 10" x 5.25"
Warranty Info:

Two years parts and labor, one year on speakers and cabinets

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