Best Rack Effects & Signal Processors of 2026

Hayden Bryant Avatar
Hayden Bryant
Last Updated: 8 Feb 2026

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Rack effects and signal processors are electronic devices used to modify sound signals in the recording studio or live performances. They come in the form of rack-mounted units that can be easily integrated into a musician's setup. These products can enhance the sound quality of instruments and vocals, add effects like reverb or delay, and even correct pitch or timing issues. They are a must-have for any serious musician or sound engineer looking to elevate their sound to the next level.

At a Glance: Our Top Picks

BOSS VE-22 Vocal Performer Multi-Effects Processor Cover #TOP 1
BOSS VE-22 Vocal Performer Multi-Effects Processor
ftb score rating icon 9.8
BOSS GX-100 Guitar and Bass Effects Processor Cover #TOP 2
BOSS GX-100 Guitar and Bass Effects Processor
ftb score rating icon 9.7
Roland E-4 Voice Tweaker Vocal Tool Cover #TOP 3
Roland E-4 Voice Tweaker Vocal Tool
ftb score rating icon 9.5

Top 7 Rack Effects & Signal Processors

#TOP 1

BOSS VE-22 Vocal Performer Multi-Effects Processor

VE-22
BOSS VE-22 Vocal Performer Multi-Effects Processor Cover
BOSS VE-22 Vocal Performer | Advanced Multi-Effects Processor for Singers | Powerful Harmony & Doubling Functions | Auto Pitch Correction | Ideal for Stage Performance, Recording, Livestreaming & More

The BOSS VE-22 Vocal Processor is a versatile tool for singers, allowing you to take control of your vocal sound effortlessly. With a library of high-quality effects, you can enhance your performance from subtle studio improvements to dramatic voice transformations. Enjoy essential effects like compression and reverb to add depth and clarity to your voice. Additionally, automatic pitch correction helps you achieve perfectly tuned vocals, whether you prefer soft adjustments or a more electronic feel.

What We Like
High-quality sound processing
Intuitive user interface
Automatic pitch correction
Diverse library of effects
#TOP 2

BOSS GX-100 Guitar and Bass Effects Processor

GX-100
Black
BOSS GX-100 Guitar and Bass Effects Processor Cover
BOSS GX-100 Black Guitar and Bass Effects Processor, 23 AIRD Amplifiers, 150+ BOSS Effects, 32-bit Floating Point Processing, 9V/300mA Power Source

The BOSS GX-100 is a powerful and easy-to-use amp and effects processor designed for both guitar and bass players. It features advanced 24-bit AD/DA conversion and 32-bit floating-point processing, ensuring high-quality sound. With a 48 kHz sampling rate, you can expect clear audio performance. The AIRD technology provides authentic tube amplifier tones and responsive touch, making your playing experience more enjoyable and expressive. With 23 amplifier types and over 150 effects, you have endless possibilities to create your unique sound.

What We Like
Advanced tone technologies
High-quality audio performance
Authentic tube amplifier tones
Wide range of effects
Easy to use
#TOP 3

Roland E-4 Voice Tweaker Vocal Tool

Black
Roland E-4 Voice Tweaker Vocal Tool Cover
Roland AIRA Compact E-4 VOICE TWEAKER | Vocal Performance Tool with Powerful Voice Transformer Effects | Vocoder | Looper | Harmony | Auto Pitch | MIDI | For Singing & Vocal Artists,Black

The Roland E-4 Tweaker is a versatile vocal performance tool that enhances your singing experience. With its auto-pitch feature, you can easily correct your pitch in real-time, ensuring you sound your best. The harmony function adds rich vocal layers, giving depth to your performances. You can also use the vocoder to create unique sounds, transforming your voice into something entirely new. Additionally, the device includes a 24-second looper, allowing you to layer your voice for more dynamic and creative performances.

What We Like
Powerful vocal effects
Easy pitch correction
Unique sound transformations
Versatile 24-second looper
#TOP 4

TC Electronic CLARITY M V2 Audio Loudness Meter

CLARITY M V2
Mehrfarbig
TC Electronic CLARITY M V2 Audio Loudness Meter Cover
TC Electronic CLARITY M V2 Stereo and 5.1 Audio Loudness Meter with 7" High Resolution Display and USB Connection for Plug-In Metering, Compatible with PC and Mac

The TC Electronic CLARITY M V2 is a desktop audiometer designed to help you accurately measure audio loudness. Its 7-inch high-resolution display offers clear and precise readings, making monitoring easier and more efficient. The USB connection allows seamless plug-in metering, so you can quickly connect it to your PC or Mac without hassle. Weighing just 1.55 kg and compact in size, it’s convenient to place on your desk without taking up much space. This tool is perfect for anyone needing reliable loudness measurement in stereo and 5.1 audio formats.

What We Like
High-resolution 7" display
USB connection for easy setup
Compact and lightweight design
Supports stereo and 5.1 audio
#TOP 5

Audient EVO 4 USB Audio Interface for Music Production

Audient
EVO4
Black
EVO 4
Audient EVO 4 USB Audio Interface for Music Production Cover
Audient EVO 4 USB Audio Interface sound card for music production (2 in / 2 out USB audio-interface, 48 Volt phantom power, 2 microphone preamps, etc.), Black

The Audient EVO 4 is a versatile USB audio interface designed for music production. It features a 2 in / 2 out configuration, allowing you to connect multiple audio sources easily. The Smartgain feature automatically sets the levels, ensuring optimal recording quality without hassle. With loopback functionality, you can capture audio from multiple software sources, perfect for streaming or podcasting. Additionally, the high-speed USB 2.0 connection supports high-quality audio up to 24 bit 96 kHz, providing clarity and depth to your recordings.

What We Like
High-quality audio recording
Smartgain for easy level setting
Versatile loopback function
Compact and stylish design
#TOP 6

Zoom V3 Vocal Processor with Effects

Black and silver
Zoom V3 Vocal Processor with Effects Cover
ZOOM V3 Vocal Processor – Effects unit for enhancing vocals, voices and speech, for recording and streaming, podcasts, videos and content optimisation, black & silver

The Zoom V3 Vocal Processor is an impressive tool for enhancing your voice recordings. With 16 creative voice effects, you can transform your sound and add a unique flair to your performances. You can create rich, three-part harmonies by adding up to two voices across a full octave, making your music more dynamic. The independent controls for compression, reverb, and delay allow you to fine-tune your sound to perfection, ensuring it fits your desired style. Additionally, the built-in Enhancer increases sound clarity, providing a professional quality to your recordings.

What We Like
Multiple voice effects available
Supports three-part harmonies
Independent control settings
Enhances sound clarity

Behringer VIRTUALIZER 3D FX2000 Multi-Engine Effects Processor

FX2000
Silver,Black
one size
Behringer VIRTUALIZER 3D FX2000 Multi-Engine Effects Processor Cover
Behringer VIRTUALIZER 3D FX2000 High-Performance 3D Multi-Engine Effects Processor, Silver and Black

The Behringer FX2000 Effects Processor offers impressive sound capabilities with its seven contemporary algorithms, providing true Real Sound Modeling stereo and 3D effects for an immersive audio experience. You can benefit from wave-adaptive virtual room reverb algorithms, which create natural-sounding reverb and delay, enhancing the depth of your music. Additionally, the processor features advanced modulation, dynamic, psychoacoustic, and EQ algorithms, allowing you to craft your sound with precision. Authentic amp simulation and distortion effects are also included, giving you the tools to achieve your desired tone effortlessly.

What We Like
High-performance sound processing
Natural reverb and delay
Advanced modulation options
Authentic amp simulation
Flexible effect configurations
Buying Guide Image
Editor's Notes

During our rack effects & signal processor research, we found 278 rack effects & signal processor products and shortlisted 7 quality products. We collected and analyzed 21,131 customer reviews through our big data system to write the rack effects & signal processors list. We found that most customers choose rack effects & signal processors with an average price of £141.94.

The rack effects & signal processors are available for purchase. We have researched hundreds of brands and picked the top brands of rack effects & signal processors, including BOSS, ROLAND, TC Electronic, Audient, Zoom.

Written by
Hayden Bryant Avatar

Hayden was born in Liverpool, and he never left his hometown until university. In his freshman year at the University of Manchester, Hayden was the group leader of a popular music group. Hayden is responsible for the popularity of his music, and this is because of his natural ability to play with keys and strings. He graduated with BFA in 2016 and returned in 2018 as a lecturing staff in the School of Music.