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Matrix GT800FX

4.5 (3)

1 Critic Review

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Page last updated Aug 10, 2025

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Description

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The Matrix GT800FX is a powerhouse in the world of guitar preamps, meticulously designed to deliver unparalleled sound quality and reliability for both studio and live performances. This solid-state amplifier is renowned for its versatile tonal capabilities, bridging the gap between traditional tube warmth and modern digital precision. Whether you're a seasoned gigging musician or a studio enthusiast, the GT800FX provides the dynamic range and headroom necessary for any musical style.

With its intuitive interface, the GT800FX allows for seamless integration into any setup, making it a favorite among professional musicians and sound engineers alike. Its dual-channel design offers flexibility, enabling you to effortlessly switch between clean and overdriven tones. The amplifier's robust construction ensures durability on the road, while its efficient cooling system prevents overheating during extended sessions.

Tailored for musicians who demand consistency and clarity, the GT800FX features customizable EQ settings that allow you to sculpt your sound with precision. Its compact form factor and lightweight design make it an ideal choice for those who require portability without compromising on performance.

Key Features:

Solid-state design for reliable performance
Dual-channel flexibility for diverse tonal options
Customizable EQ settings for precise sound sculpting
Efficient cooling system for extended use
Lightweight and compact for easy transport and setup
Seamless integration with existing gear setups

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Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Matrix GT800FX.

Comparisons

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The GT800FX is often compared to the GT1000, with the latter known for not coloring sound and performing well with FRFR setups like the Matrix CFR or Atomic Wedge.
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Users highlight the GT800FX's versatility over tube power amps, noting its ability to maintain sound quality at different volume levels.
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Use cases and applications

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The GT800FX is recommended for use with both FRFR setups and traditional cabs like Marshall, providing versatility for various setups.
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The GT800FX is recommended for direct use with FX returns on amps like the Boss Katana, offering a warm and articulate sound for stage volume.
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For optimal cab performance, adjust the Speaker Impedance Curve to match your cab's low resonant frequency to enhance the tactile response and sound projection.
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User experience

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Users have noted that the GT1000 really starts to 'bloom' and open up around the 2-3 o'clock position on the volume dial, suggesting a dynamic response at higher volumes.
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Owners appreciate the GT800FX for its transparency and reliability even after prolonged use, making it a dependable choice for regular gigging.
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Users report that the Matrix GT800FX was utilized by Metallica's live rigs, indicating its professional-grade reliability and performance.
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Build quality

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The GT800FX is praised for its lightweight design, enhancing portability without compromising durability.
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Features and functionality

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Several users endorse the GT800FX for its seamless integration with digital processing units like the Axe FX, providing high-quality sound reproduction.
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It's advised to disable global IR when using traditional cabs to avoid shrill tones, ensuring a cleaner sound with a power amp setup.
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Setup and maintenance

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Some users recommend rolling off highs and lows with a parametric EQ to maintain tonal balance when adjusting volume levels.
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Critic Reviews

Matrix Amplification GT800FX Power Amplifier – MusicPlayers.com

musicplayers.com

The Matrix GT800FX power amplifier impresses with its lightweight, compact design and tube-like tonal quality, making it a compelling choice for guitarists using modeling amps. Delivering up to 800 Watts at 8 ohms in a manageable 1U rack size, it offers a practical alternative to bulky tube amps. The amp's straightforward controls and ample power output are praised, though the lack of a Presence control and a robust power switch could be improved. Despite minor setbacks like rack installation issues due to screw design, overall, the GT800FX provides an affordable, powerful, and authentic tone solution for modern guitarists.

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4.5 out of 5

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Robin Finck

Guitarist

Nine Inch Nails

Verified via Guitar

This detailed gear diagram of Robin Finck's Nine Inch Nails stage setup, which traces the signal flow of the equipment in his 2014 guitar rig, includes a Matrix GT800FX.

Dino Cazares

Guitarist

Fear Factory

Verified via Photo

Dino Cazares and his rack which includes a Matrix GT800FX.

Jerry Horton

Guitarist

Papa Roach

Verified via YouTube

A Matrix GT800FX can be seen at 2:22 of this "Rig Rundown" with Premier Guitar.

Scott Hull

Guitarist, Music Producer

Pig Destroyer

Verified via guitarworld

"Matrix Amplification is a company out of the UK that makes these very small but extremely powerful power amps, and I have one rack mount station called the GT800FX. It’s a 1,000-watt harness power amp that is about 10 pounds, but that means you can actually carry this thing onto the plane and travel anywhere in the world without having to check it."