Positive Grid Bias Rack

$999.00 to $1,299.00 Price Tier: High-end

4.5 (3)

1 Critic Review

1 Review

Find out who is using Positive Grid Bias Rack

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Page last updated Jun 12, 2026

Pricing and availability

We compare 600+ stores and found this item at 3 stores. Prices updated June 12, 2026.

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Reviews

Price

3.5 (5)

$999.00

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$1,299.00

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5.0 (4)

$1,078.82 1 available New

$349.92 2 available Used

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Average Price: $932

High-end/Boutique

$300

$801+

Price Tier

In the Guitar Amplifier Heads category, Positive Grid Bias Rack is priced in the High-end/Boutique range. This premium gear is built to very high standards and offers premium features.

Budget

Standard

High-end

Price History

Based on price data from 2 merchants for "Positive Grid Bias Rack". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

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Description

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Step into a world of limitless tonal possibilities with the Positive Grid BIAS Rack. This guitar amplifier head is not just an amplifier—it's your ticket to a universe of custom soundscapes. Rooted in the dynamic Amp Match technology, this device allows you to capture and recreate the unique essence of any amplifier, making it an invaluable tool for both studio and stage. The integration with the BIAS Amp Pro software (included) means you can design your own amplifiers, tailor every component to your liking, and store them in one of the 25 available presets for instant access.

Whether you're after a pristine clean tone or a searing high-gain assault, the BIAS Rack has you covered. Its robust connectivity options, including USB and Bluetooth, offer seamless integration with both computers and mobile devices, ensuring your killer tones are always at your fingertips. And with access to the BIAS ToneCloud, you can explore a treasure trove of amp models crafted by musicians worldwide, or contribute your own creations to this vibrant community.

With the Positive Grid BIAS Rack, your sound is truly one-of-a-kind—crafted by you, for you.

Key Features:

Rackmount guitar and bass preamplifier with full integration with BIAS Amp Pro software
Stores 25 presets for quick access
Create custom amplifier designs with included software
Amp Match technology for replicating recorded guitar tones
Access thousands of custom amp models via ToneCloud
USB and Bluetooth connectivity for easy integration
Nine premium reverb types with detailed control options
MIDI in/out/thru connections for versatile rig setups

Product specs

Type	Hybrid hardware/software guitar preamp system
EQ	3-band EQ
Amp Modeling	Yes, loaded with 25 presets (download more with Bias Amp software Mac/PC)
Number of Models	Load and configure tube types, transformers, cabs, tone stacks and more
Inputs	1 x 1/4" (instrument)
Outputs	2 x XLR (balanced line out), 2 x 1/4" (line out)
Headphones	1 x 1/4"
Effects Loop	Yes
MIDI I/O	In/Out/Thru
USB	1 x Type B
Bluetooth	Yes
Footswitch I/O	2 x 1/4"
Footswitch Included	No
Computer Connectivity	USB
Software	Bias Amp App (iOS 8 or later)
Power Source	Standard IEC AC cable
Height	3.5"
Width	19"
Depth	13.5"
Weight	15 lbs.

FAQs

What type of connectivity options does the Positive Grid Bias Rack offer?: The Positive Grid Bias Rack provides a variety of connectivity options, including 1/4" instrument input, XLR and 1/4" line outputs, MIDI In/Out/Thru, USB for computer connectivity, Bluetooth, and a 1/4" headphone output.
Can I use the Positive Grid Bias Rack for both guitar and bass amplification?: Yes, the Positive Grid Bias Rack is designed to work with both guitar and bass, offering versatile amp modeling and tone customization suitable for both instruments.
Does the Positive Grid Bias Rack include a footswitch?: No, the Positive Grid Bias Rack does not include a footswitch, but it features two 1/4" footswitch inputs for external control.
How does the Positive Grid Bias Rack's amp modeling work?: The Bias Rack is equipped with 25 presets and allows for extensive customization through the Bias Amp software, enabling users to load and configure tube types, transformers, cabs, and tone stacks.
Is the Positive Grid Bias Rack suitable for live performances?: Yes, the Bias Rack is suitable for live performances, offering versatile amp modeling, effects loop, and balanced outputs for direct connection to PA systems.
Can I expand the preset library of the Positive Grid Bias Rack?: Yes, you can expand the preset library by downloading additional presets through the Bias Amp software on your Mac or PC.
Does the Positive Grid Bias Rack require an external power supply?: The Bias Rack uses a standard IEC AC cable for power, eliminating the need for an external power supply.

Videos

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Alberto Barrero

POSITIVE GRID / BIAS Rack Processor

Alberto Barrero

World exclusive- Positive Grid Bias Rack unboxing + all the factory amps!

Idan Shahar

GearGossip Bias Rack Processor review (ENG)

ThomasSchuber

Positive Grid BIAS Rack Amp - recensione

accordoTV

BIAS Rack amplifier - Justin Longshore

Positive Grid

Reviews

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PROS

Unmatched versatility and sound customization
Organic, natural tones indistinguishable from real tube amps
Easy-to-use software for tone creation on multiple platforms
Powerful DAW plugin included for home recording
Simplifies signal chain, direct integration into setups
Superior sound quality with punchier low end than competitors
Excellent customer support team

CONS

Front LED lights too bright in dark settings
Software for iPad requires separate purchase
MIDI channel fixed at 1, limiting integration with other MIDI gear
Lacks built-in tuner and effects beyond reverb
Bluetooth cannot be turned off, posing security risks live
Not all settings adjustable from the front panel

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Positive Grid Bias Rack.

Features and functionality

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Owners mention the Bias Rack excels in modeling specific amps and can be expanded with more models via Bias Amp 2 software upgrades.
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The Bias Rack exhibits a constant hiss across all presets, even at low volumes, which persists despite factory resets and preset changes.
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The headphone output on some units may not function, adding to potential quality control concerns.
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High gain presets may require users to max out gain stages and use an EQ boost for satisfactory dirt levels.
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Software and compatibility

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Bias Rack lacks a built-in audio interface, which some users find inconvenient for direct recording or practice setups.
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Some users experience hiss when the Bias Rack is connected to a PC running other programs, though this may vary with individual setups.
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0 0

Users note Bias FX2 Elite, which includes Bias Amp 2, also struggles with providing sufficient gain without additional settings adjustments.
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Use cases and applications

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The Bias Rack is praised as a versatile rehearsal and travel rig due to its compact design and integration with Bias Amp 2.
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Value and pricing

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At a price under $300, the Bias Rack is considered a particularly good deal, especially when compared to Kemper or Axe-Fx for beginners.
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User experience

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Some users note the learning curve is steeper than expected, requiring time to effectively dial in desired sounds.
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Attempting to bypass preamp stages via the return jack results in increased noise, and switching causes loud pops, highlighting potential design or quality control issues.
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Owners have noted that swapping amp models reveals a "signature" tube sound beneath the hiss, which can be frustrating for those seeking clean tones.
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0 0

Some owners feel promotional videos use post-processing or external amps to achieve advertised high gain tones.
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Comparisons

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POD Farm Metal Shop's Mississippi Criminal (5150 model) is favored by some users over Bias Rack for its superior dirt and hard rock tones.
Source

Critic Reviews

Positive Grid BIAS Rack Review - Premier Guitar

premierguitar.com

The Positive Grid BIAS Rack promises excellent amp modeling with a vast library of tones and a lucid control layout, making it a delight for sound design enthusiasts. Yet, it's bogged down by incomplete documentation and software issues, including unreliable amp-matching features and a crash-prone interface. Users may find the lack of light rings on knobs frustrating, as it hampers the ease of use when switching presets. Despite its potential, the BIAS Rack struggles to deliver on its promises without a computer connection, leaving much to be desired until software improvements are made.

negative

Full Review

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4.5 out of 5

Based on 1 Review and 3 Ratings

5 star

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1 star

samgraffeo

302

almost 10 years ago

Fully Featured Design-An-Amp

Taking their software to another level is Bias Rack. What you come to expect from the BIAS amp software is now convenient and practical to use live in rack form.

Roles:

Singer Guitarist Music Producer

Genres:

Rock Metal

Artist usage

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Josh Gilbert

Bassist

As I Lay Dying

Verified via Twitter

In this post Josh shows off the bias rack unit he uses

Steve Tucker

Singer, Bassist

Morbid Angel

Verified via Positivegrid

According to Positive Grids website, Tuckr uses the Bias Rack.

Pete Koller

Guitarist

Sick of It All

Verified via Positive Grid

Here he is playing “Black Venom” off the record “When The Smoke Clears” using his BIAS Rack amplifier

Mark Jansen

Guitarist

Epica

Verified via YouTube

Isaac states that both guitarrist are using the Positive Grid Bias Rack system.

Aaron Patrick

Bassist

All That Remains

Verified via Positivegrid

According to the positive grid website, Aaron uses a bias amp rack

Dan Rayner

Pitchshifter

Verified via Facebook

In a Facebook video by Positive Grid, Dan Rayner discusses his use of the Positive Grid Bias Rack for achieving diverse tones, including a Mesa Triple Rectifier modulation for dirty tones and a Matchless 30DC for clean sounds.