Gallien-Krueger Fusion 550 Hybrid Bi-Amp Bass Head - Long & McQuade Music Educator Site
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Gallien-Krueger Fusion 550 Hybrid Bi-Amp Bass Head

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FUSION550

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The Gallien-Krueger Fusion 550 is GK's first bass amp head featuring an all-tube preamp. The Fusion 550 bass head incorporates a uniquely designed 6-stage tube preamp paired with a 500W version of the high-current solid-state power amp used in the GK 1001RB-II. The rich warmth of tubes, combined with the quick, punchy power that G-K bass amps are known for, is an aural experience you must hear to believe.

As if that wasn't enough, GK has inventively incorporated motorized knobs into the Fusion 550 head that allow you to store two different settings. This gives you the ability to dial in a separate overdrive or slap tone and footswitch between them-a first for a fully analog bass amplifier.

The Fusion 550 amp also features a simplified version of GK's exclusive 50-W Horn Bi-Amp System. Dial in the horn where you like it, and as you adjust your volume with the master control, the ratio between the woofer and tweeter is preserved. Other features include a tube driven 4-band active EQ and voicing filters with a frequency select for the contour control. The rear panel features include Neutrik Speakon and 1/4" speaker output jacks, effects loop, tuner out, and a footswitch input jack. It also has a DI output which uses an isolated transformer for ultra-quiet operation.

Features:
- Power Amp
- 500-watt Class G solidstate power amp
- 50-watt Horn Bi-Amp System
- Toroidal transformer

Pre Amp:
- Six-stage all tube preamp (three 12AX7's)
- Footswitchable two-channel motorized gain, master, and horn level controls
- Tube driven four-band active EQ
- Contour control with 500Hz-800Hz mid-frequency select
- Deep and bright switch
- Mute switch
- 1/4" input jack with active/passive switch (-14dB)

Rear Panel:
- Effects loop & tuner output
- Active DI with level control, pre/post, and ground switch
- Two Horn Bi-Amp compatible Speakon outputs
- Two 1/4" speaker outputs (fullrange only)
- Rear-vented temperature controlled fan

Features:
- 500 watts 4 ohms
- 350 watts 8 ohms
- 50 watt horn bi-amp system
- Four band active EQ
- Variable contour with mid frequency select
- Three Tube pre-amp (12AX7)
- Tuning mute and motorized knobs (foot switchable)
- Effects loop & tuner out with mute
- XLR out, pre/post EQ & ground lift switch
- Speakon and 1/4 outputs
- 19x10x5.25 25lbs.

Gallien Krueger Fusion 550 Bass1 of 1 customers found this review helpful

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Product ExperienceI own it
Closest StoreToronto (Bloor St.), Ontario
Hands down one of the finest bass heads I've ever used! I still own my first Gallien Krueger 800 RB head, and it has never let me down! The new Fusion uses the same 4 band tone shaping as the 800, but took the preamp section to the next level. Dual, foot switchable channels, motorized controls, and tons of power make for an instant classic! You must try this head!
Posted by Donny Hill on Feb 20, 2017
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Great Head1 of 1 customers found this review helpful

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Product ExperienceI own it
Closest StoreCalgary North, Alberta
Great head, have it paired with a Neo 410/4. The tubes give it a nice warmth, a/b'd it against a few other heads including the GK MB Fusion and this one was the clear winner. Only downside is the price, should be a few hundred bucks less.
Posted by anonymous on Dec 26, 2015
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The ONLY head you'll ever need2 of 2 customers found this review helpful

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ValueProduct ratingProduct ratingProduct ratingProduct ratingProduct rating
OverallProduct ratingProduct ratingProduct ratingProduct ratingProduct rating
Product ExperienceI own it
Closest StoreToronto (Bloor St.), Ontario
Once you've used this head, nothing else compares. The clear, punchy tones and warmth of the pre-amp make everything else seem inadequate. I've tried using other combos, heads, but the GK Fusion 550 has set the new standard for me. Not a single bad thing to say about it.
Posted by Tristan on Dec 15, 2015
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Sale Price: $999.00
Store Special Product - GK Bass Hybrid Head
Model: FUSION550
Serial: 1649a07104414
Quantity Available: 1
Condition: Used
Store Special Product - GK Bass Hybrid Head
Sale Price: $1099.00
Store Special Product - Fusion 550 Hybrid Bi-Amp Bass Head
Model: FUSION550
Serial: Ub1649a07104381
Quantity Available: 1
Condition: Used