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Gallien-Krueger MB Fusion 800 bass guitar amplifier head

Discontinued, this product can no longer be ordered.

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Gallien-Krueger MB Fusion 800 bass guitar amplifier head
Product no: 9000-0010-6884 Bax Music Warranty: This product comes with a 3-year warranty.

General

Gallien-Krueger took their immensely popular MB Fusion bass amplifier, swapped its power amp with that of the MB800 and made several other very practical upgrades. The result is this small yet versatile powerhouse: the MB Fusion 800. It boasts a massive 800 watts of power and still weighs only 2.5 kilos. As it is so compact, you can easily bring it in your gig bag. The MB Fusion 800 is equipped with three 12AX7 preamp tubes for a rich, warm sound and tasteful distortion. The digital class-D power amplifier gives you the authentic GK punch and quick response.

Gallien-Krueger MB Fusion 800: practical features

The MB Fusion 800 has two switchable channels that allow you to go from a full, warm and clean sound to the characteristic Gallien-Krueger edge. Both channels have their own volume and gain control, which allow you to use channel B as drive at the same volume as channel A, or use both channels at different volumes for solos. Moreover, the MB Fusion 800 is fitted with GK's famous active 4-band equalizer and contour control. Contrary to the MB Fusion 500, this amp has the voicing filters (contour 500/800Hz, presence and deep) and the limiter on the front panel, disguised as push/pull contour, treble, bass and master controls.

DI-output, FX loop and more

On the back is Gallien Krueger's high-end DI output with ground lift and pre/post EQ button. Next to the footswitch input is the tuner output and the FX loop that let you add your favourite external effects to the overall signal. Additionally, the MB Fusion 800 features a headphone output that can also be used as a line-out or to daisy chain a GK MB powered speaker cabinet or heavier power amp. Last but not least, the amp's fitted with two SpeakOn outputs for cabinets of 1x 4 ohms, 1x 8 ohms, 2x 8 ohms or 1x 16 ohms.

Tips or comments about this product

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Specifications

Product features

Connectors External speaker(s), Footswitch, Headphone, Line-out
Number of channels 2
Number of speaker outputs 2
Amp modelling no
Sustainable product not specified
Effects loop yes
Weight 0 - 4.9 kg
Speaker output impedance 16 Ohms, 8 Ohms, 4 Ohms
Built-in tuner no
Built-in compressor no
Built-in effects none
Colour black
Power attenuator no
Amplifier type hybrid
Amplifier valve not applicable
Power in Watts 751 - 1,000 Watts

Weight and dimensions including packaging

Weight (incl. packaging) 2,6 kg
Dimensions (incl. packaging) 51,0 x 41,0 x 18,0 cm

Product specifications

  • hybrid bass guitar amplifier top
  • designed and built in the USA
  • very compact and lightweight
  • tube preamp section of the MB Fusion
  • energy-efficient class-D digital power amp
  • preamp tubes: 3x 12AX7
  • number of channels: 2, gain A and gain B (with separate volume controls)
  • channels can be selected on the front panel or with the included foot switch
  • 800 W at 4 ohms, 560 W at 8 ohms
  • knobs with LED lighting for improved visibility on dark stages
  • active 4-band EQ with four specific bass frequencies
  • contour controls: scooped mids, added bass and treble
  • -10dB pad switch in the input section for active and high-output bass guitars
  • self noise: 90 dB (A-weighted)
  • on/off button with Power/Protect LED ring
  • line/chain output to connect GK MB-powered speaker cabinets
  • power supply: 230 volts / 240~ 60 Hz
  • power: 880W (full), 160W RMS
  • cooling: variable fan
  • dimensions: 279 x 311 x 44.5 mm
  • height including rubber feet: 63.5mm
  • weight: 2.5 kg


push/pull knobs

  • gain A: activates channel A
  • gain B: activates channel B
  • contour: switches the mid cut between 500 Hz (white LED) and 800 Hz (blue LED)
  • treble: activates presence function
  • bass: activates deep function
  • master: activates built-in limiter (standard setting is on)


Connectors:

  • 6.3mm instrument input with -10dB pad
  • DI output: XLR with ground lift and pre/post EQ switch
  • footswitch input: 6.3mm mono jack
  • tuner output with mute function (on the front): 1x 6.3mm jack
  • FX loop send + return: 2x 6.3mm jack
  • headphone/line/chain output (selectable): 6.3mm TRS jack
  • 2x Neutrik SpeakOn output: max 1x 4 ohms or 2x 8 ohms


Equalizer:

  • bass: +/-14 dB at 40 Hz
  • Lo-Mid: +6 dB/-9 dB at 250 Hz
  • Hi-Mid: +5 dB/-8 dB at 1 kHz
  • Treble: +10 dB/-19 dB at 7 kHz


Voicing filters:

  • Contour: -16 dB at 500 Hz or -15 dB at 800 Hz
  • Deep: +4 dB at 30 Hz
  • Bright: +4 dB at 10 kHz


Safety:

  • full short-circuit, thermal and RF safety
  • stable in reactive and mismatch loads
  • 5 second muted warm up
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Gallien-Krueger MB Fusion 800 bass guitar amplifier head

Wrote the following about Gallien-Krueger MB Fusion 800 bass guitar amplifier head
Super lichtgewicht bas amp met genoeg vermogen, 1 rackunit (rackmounts apart te bestellen), 3 buizen pre-amp en footswitch voor switchen tussen de 2 kanalen. Doordat het front verlicht is kun je on stage indien nodig goed en snel je sound tweaken
Gallien-Krueger MB Fusion 800 bass guitar amplifier head

Wrote the following about Gallien-Krueger MB Fusion 800 bass guitar amplifier head
Super lichtgewicht bas amp met genoeg vermogen, 1 rackunit (rackmounts apart te bestellen), 3 buizen pre-amp en footswitch voor switchen tussen de 2 kanalen. Doordat het front verlicht is kun je on stage indien nodig goed en snel je sound tweaken
Description Type Language Extension
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