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Average Price: $700

Standard/Professional

$200

$801+

Price Tier

Budget

Standard

High-end

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Description

Experience the power and precision of the MB Fusion 800, a remarkable bass amplifier head designed for the discerning musician. This amplifier head combines the rich warmth of all-tube preamplification with the reliable power of a solid-state output, providing a dynamic and versatile sound suited for any performance setting. The MB Fusion 800 stands out with its three-tube preamp, offering musicians a classic tube tone that can be driven to suit a wide range of styles, from smooth jazz to punchy rock.

Its intuitive control layout gives you easy access to essential features, ensuring that you spend less time tweaking knobs and more time playing. The MB Fusion 800 includes a comprehensive 4-band EQ, enhancing your ability to shape your sound precisely. Additionally, the footswitchable gain and master volume controls offer seamless transitions between different sonic textures, making it an excellent choice for both stage and studio environments.

Designed with the modern bassist in mind, the MB Fusion 800 is lightweight yet robust, providing portability without compromising on durability or performance. This amplifier head offers flexible connectivity options, including a balanced DI output for direct connection to PA systems or recording interfaces.

Key Features:

  • 800 watts of power for commanding stage presence
  • Three-tube preamp for authentic tube warmth
  • 4-band EQ for precise tone shaping
  • Footswitchable gain and master volume controls
  • Balanced DI output for direct connection to recording or PA systems
  • Lightweight design for easy transport
  • Compatible with a variety of cabinet configurations

Product specs

Brand Gallien-Krueger
Model MB Fusion 800 Ultra-Light 800W Tube Preamp Bass Head
Finish Black
Year 2010s
Made In United States
Categories Bass Heads
Color Family Black
Electronics Solid State
Impedance 4 ohms
Number of Channels 1 Channel
Number of Inputs 1 Input
Output Power (Watts) 800
Power Tube Type None
Reverb None

FAQs

How much power does the Gallien-Krueger MB Fusion 800 provide?

The Gallien-Krueger MB Fusion 800 delivers 800 watts of power, making it suitable for a wide range of performance settings, from small venues to larger stages.

What type of preamp does the MB Fusion 800 use?

The MB Fusion 800 features a tube preamp, which provides warm, rich tones that bass players often seek for both live and studio settings.

Is the Gallien-Krueger MB Fusion 800 suitable for gigging musicians?

Yes, with its 800-watt output and lightweight design, the MB Fusion 800 is ideal for gigging musicians who need a powerful yet portable bass amplifier head.

Can the MB Fusion 800 handle a 4-ohm load?

Yes, the MB Fusion 800 is designed to work with a 4-ohm impedance, ensuring compatibility with a variety of bass cabinets.

Does the Gallien-Krueger MB Fusion 800 include any built-in effects like reverb?

No, the MB Fusion 800 does not include built-in effects such as reverb, focusing instead on delivering pure, powerful bass tones.

Sweetwater

Sweetwater

Gallien-Krueger MB Fusion 800 Hybrid Micro Bass Head Demo by Sweetwater

Video thumbnail for Gallien-Krueger MB Fusion 800 Hybrid Micro Bass Head Demo by Sweetwater by Sweetwater

Gallien-Krueger MB Fusion 800 Hybrid Micro Bass Head Demo by Sweetwater

Sweetwater

Sweetwater

Video thumbnail for Gallien-Krueger MB Fusion 800 Demo by Norm Stockton by Gallien-Krueger

Gallien-Krueger MB Fusion 800 Demo by Norm Stockton

Gallien-Krueger

Gallien-Krueger

Video thumbnail for Gallien-Krueger MB Fusion 800 Bass Head by N Stuff Music

Gallien-Krueger MB Fusion 800 Bass Head

N Stuff Music

N Stuff Music

Video thumbnail for 【デジマートNew Gear Showcase】Gallien-Krueger / MB Fusion 800 & 410 MBE-II/800 by digimartnet

【デジマートNew Gear Showcase】Gallien-Krueger / MB Fusion 800 & 410 MBE-II/800

digimartnet

digimartnet

Reviews

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Gallien-Krueger MB Fusion 800.

User experience

  • Some users experienced persistent white noise issues with the MB Fusion 800, even after multiple repair attempts, suggesting potential quality control inconsistencies.

    Source
  • Owners outside the USA reported difficulties with customer support responsiveness, indicating potential regional service disparities.

    Source
  • Owners appreciate the Fusion 800 for its ability to deliver a strong, punchy bass tone, which is particularly favored by those aiming for a robust low-end presence.

    Source

Comparisons

  • Compared to the older solid-state models, the MB Fusion 800's Class D with a tube preamp has been noted as less reliable by some owners.

    Source
  • The MB Fusion 800 features a newer power module compared to the Fusion 500, offering higher wattage and updated technology for enhanced performance.

    Source

Build quality

  • An issue with the power amplifier (Ice module) was identified, requiring replacement, highlighting potential vulnerabilities in this component.

    Source

Setup and maintenance

  • 12AX7 tubes in the MB Fusion 800 can last decades if not dropped; they're prone to failure but easy to replace at local music stores or online.

    Source
  • It's recommended to carry a replacement 12AX7 tube as they're the most likely failure point; use caution when handling due to high voltage and heat.

    Source

Mods and upgrades

  • Swapping the V1 tube with different 12AX7 brands like New Sensor or JJ can subtly tweak the amp's sound, while V2 and V3 changes are less impactful.

    Source

Features and functionality

  • The MB Fusion 800's preamp uses three 12AX7 tubes, also known as ECC83, 7025, or CV4004, with V1 affecting input gain for sound customization.

    Source
  • The Fusion 800 retains the same preamp as the Fusion 500 but benefits from a more powerful output section, making it suitable for larger venues or louder playing environments.

    Source

Use cases and applications

  • The Fusion 800 is preferred for achieving a mid-tone with added punch and bass emphasis, ideal for players seeking a dynamic, impactful sound.

    Source

Critic Reviews

Gallien-Krueger MB Fusion 800 Head & NEO 410 Cabinet Bass Rig - Bass Guitars - Harmony Central

harmonycentral.com

Based on 0 Reviews and 0 Ratings

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Artist usage

Add artist
See how Kristian Dunn uses Gallien-Krueger MB Fusion 800

Kristian Dunn

Guitarist, Bassist

El Ten Eleven

...
Verified via YouTube

"So, this is my amp. It's a GK MB 800 Fusion"

Genre Usage

Based on how artists on Equipboard use this gear, it is most commonly found in the following genres.

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