Pricing and availability

We compare 600+ stores and found this item at 4 stores. Prices updated .

Sweetwater
4.0 (32)
$549.00
Amazon
4.6 (37)
$494.10 Used
Reverb
5.0 (13)
$488.13 New
$305.00 Used

Average Price: $472

Standard/Professional

$150

$601+

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Standard

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Price History

Based on price data from 3 merchants for "Gallien-Krueger PLEX Preamp". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

Introducing the Gallien-Krueger PLEX Preamp, your new go-to for a bass preamp pedal that's chock-full of impressive features. Designed to be a versatile and convenient tool for every bassist, the PLEX Preamp brings a wealth of tonal possibilities and practical functions to your fingertips. Its 4-band active EQ offers an extensive range of sound-shaping opportunities, while the familiar Contour control ensures fans of the legendary 800RB bass head will feel right at home.

The PLEX Preamp doesn't stop there. It also includes a built-in compressor to refine your sound and a chromatic tuner to keep your intonation spot-on. Need to boost a weak bass signal? The PLEX has you covered with its boost function. Plus, with a direct XLR out, you can plug straight into a console or PA, simplifying your setup. And if you're into re-amping, you'll love the PLEX's USB in/out - a favorite feature among our community.

Key Features:

  • 4-band active EQ and Contour control for precise sound shaping
  • Selectable voicing filters for expanded tonal options
  • Built-in compressor with variable ratio, threshold, and attack/release
  • Chromatic tuner with easy-to-read LED display
  • Boost function with variable clipping and level switch
  • Aux input and headphones output for solo practice or jamming with recordings
  • XLR output with ground lift and pre/post selector for direct input
  • USB in/out for direct recording and re-amping
  • Effects send and return for easy integration with other processors

Product specs

Type Bass Preamp/Tuner/Interface
Form Factor Pedal
Inputs 1 x 1/4" (instrument), 1 x 1/4" (return), 1 x 1/8" (aux in)
Outputs 1 x 1/4" (out), 1 x 1/4" (send), 1 x 1/8" (headphones), 1 x XLR (direct out)
Computer Connectivity USB Micro-B (recording, MIDI In/Out)
Power Source 9V DC power supply (included)
Height 1.4"
Width 5.3"
Depth 5.6"
Weight 1.5 lbs.

FAQs

What features does the Gallien-Krueger PLEX Preamp offer for bass players?

The Gallien-Krueger PLEX Preamp provides a 4-band active EQ, built-in tuner, and USB connectivity for recording and MIDI, making it versatile for live and studio use.

Can the Gallien-Krueger PLEX Preamp be used with headphones for silent practice?

Yes, the Gallien-Krueger PLEX Preamp has a 1/8" headphone output, allowing for silent practice sessions.

Is the Gallien-Krueger PLEX Preamp compatible with computer recording setups?

The Gallien-Krueger PLEX Preamp features USB Micro-B connectivity for direct recording to a computer and MIDI In/Out, enhancing its integration with recording setups.

What power supply does the Gallien-Krueger PLEX Preamp require?

The Gallien-Krueger PLEX Preamp operates on a 9V DC power supply, which is included with the pedal.

How does the Gallien-Krueger PLEX Preamp enhance live bass performances?

The Gallien-Krueger PLEX Preamp offers a direct XLR output for sending a balanced signal to a PA system, ensuring high-quality sound in live settings.

Daric's Bass Lessons

Daric's Bass Lessons

GK Plex Preamp Demo ~ Gallien Krueger Bass Guitar Pedal

Video thumbnail for GK Plex Preamp Demo ~ Gallien Krueger Bass Guitar Pedal by Daric's Bass Lessons

GK Plex Preamp Demo ~ Gallien Krueger Bass Guitar Pedal

Daric's Bass Lessons

Daric's Bass Lessons

Video thumbnail for Gallien Krueger GK PLEX Preamp Pedal Sound Demo by The Bass Hang

Gallien Krueger GK PLEX Preamp Pedal Sound Demo

The Bass Hang

The Bass Hang

Video thumbnail for Gallien-Krueger PLEX Preamp Pedal Run-Through by Gallien-Krueger

Gallien-Krueger PLEX Preamp Pedal Run-Through

Gallien-Krueger

Gallien-Krueger

Video thumbnail for PLEX Preamp Demo By Norm Stockton by Gallien-Krueger

PLEX Preamp Demo By Norm Stockton

Gallien-Krueger

Gallien-Krueger

Video thumbnail for Gallien Krueger PLEX Bass Preamp - Amp Modelling and so much more! by Andertons Music Co

Gallien Krueger PLEX Bass Preamp - Amp Modelling and so much more!

Andertons Music Co

Andertons Music Co

Video thumbnail for Gallien-Krueger PLEX 4-band Active Preamp Pedal Demo by Sweetwater

Gallien-Krueger PLEX 4-band Active Preamp Pedal Demo

Sweetwater

Sweetwater

Video thumbnail for Gallien-Krueger PLEX Preamp Live Demo (Overdrive and Compression) by Gallien-Krueger

Gallien-Krueger PLEX Preamp Live Demo (Overdrive and Compression)

Gallien-Krueger

Gallien-Krueger

Video thumbnail for Gallien Krueger PLEX Preamp Pedal Sound DEMO by M.O Bass by M.O BASS

Gallien Krueger PLEX Preamp Pedal Sound DEMO by M.O Bass

M.O BASS

M.O BASS

Video thumbnail for PLEX Preamp pedal, the secret to good sound by Roy's Studio Adventures

PLEX Preamp pedal, the secret to good sound

Roy's Studio Adventures

Roy's Studio Adventures

Reviews

PROS

  • Versatile 4-band EQ allows for extensive tonal adjustment

  • Built-in tuner, compressor, and overdrive enhance functionality

  • Functions as a computer interface for quiet practice with aux and headphones jacks

  • Includes 4 GK amp models for varied sound options

  • Effective DI for seamless live and studio integration

  • Effects loop adds flexibility for signal chain customization

  • Organic sounding amp sim technology for authentic tones

  • Captures the classic GK sound beloved by long-term fans

  • Can replace an entire pedalboard, saving space and setup time

CONS

  • Steep learning curve due to complex features and submenus

  • Tuner activation and use can be cumbersome and inconsistent

  • Compressor may cause popping at higher settings, limiting its use

  • Overdrive quality not universally appreciated, with dissatisfaction at higher levels

Owner Insights

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

Features and functionality

  • The DI output on the GK Plex is affected by the volume knob, which is unexpected for many users.

    Source
  • The built-in tuner is difficult to activate and not highly regarded in terms of performance.

    Source
  • The built-in overdrive is often described as muddy and lacking character, not ideal for those who prioritize overdrive in their setup.

    Source
  • The compressor lacks granular control, offering only preset attack and sustain settings, with "Medium Attack, Slow Release" being a preferred option.

    Source
  • The Plex's aux in and headphone out are praised for their quality, making it excellent for silent practice and personal monitoring.

    Source
  • The Plex lacks cab sim, which users often compensate for with other gear like the MLD preamp.

    Source

Other

  • The Plex is more suited as a GK amp simulator or home practice pedal rather than as a versatile AI interface.

    Source

Value and pricing

  • Some users find the Plex expensive considering its limited versatility and support, especially with the lack of updates since 2020.

    Source

Use cases and applications

  • The Plex performs well for users needing a compact GK sound for DI applications, leaving larger cabs at home.

    Source
  • The Plex can serve as a minimalist gear setup, particularly advantageous for rock-centric gigs with monitor support.

    Source
  • Users note the Plex can run GK powered speakers, although not all have tested this functionality.

    Source

Setup and maintenance

  • Contact cleaner can resolve sticky overdrive and compression buttons.

    Source

Comparisons

  • Compared to the 3Leaf Audio Enabler and Helix Stomp XL, the Plex is quieter in output volume.

    Source

User experience

  • Owners note that the Plex is often undervalued due to a lack of brand recognition in certain regions, such as Asia.

    Source
  • The Plex's double-click tuner activation is cumbersome, with some preferring an additional switch for easier use on stage.

    Source

Build quality

  • The Plex is noted for its rugged construction, solidly built in the USA, adding to its reliability on stage.

    Source

Critic Reviews

Gallien Krueger Plex Preamp review | Guitar World

guitarworld.com

With its impressive multifunctionality packed into a robust design, the Gallien-Krueger Plex Preamp shines as a versatile tool for bassists. It offers a range of features including a DI, preamp, overdrive, and a recording interface, all highly functional and easy to navigate. The straightforward EQ controls and effective overdrive options enhance its usability. However, it may not be ideal for stomping onstage due to its tabletop design. While the Plex excels in various contexts, it might not completely replace dedicated pedals or interfaces for all players. Overall, it’s a great value for those seeking an all-in-one solution for practice and recording.

positive

GALLIEN KRUEGER PLEX BASS PREAMP - Mixdown Magazine

mixdownmag.com.au

The Gallien-Krueger PLEX Preamp shines as a versatile tool for bassists, blending an impressive array of features—such as USB recording outputs, headphone jacks, and a robust four-band EQ. Its solid overdrive circuit and built-in tuner enhance functionality, making it ideal for both live performance and studio work. However, while it excels in connectivity and tonal control, some users may find the learning curve steep due to its extensive options. Overall, the PLEX stands out as a powerful workhorse for those seeking to elevate their sound, but may overwhelm less experienced players.

positive

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Genre Usage

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

Used With

Based on how musicians on Equipboard use Gallien-Krueger PLEX Preamp, it is most commonly used with the following gear.

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