Positive Grid BIAS Head

$999.00 Price Tier: Standard

5.0 (5)

2 Critic Reviews

1 Review

Find out who is using Positive Grid BIAS Head

3 wishlisted

15 saved

Page last updated Jun 04, 2026

Pricing and availability

We compare 600+ stores and found this item at 1 store. Prices updated June 4, 2026.

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Reviews

Price

5.0 (12)

$999.00 1 available New

$450.00 8 available Used

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Average Price: $725

Standard/Professional

$300

$801+

Price Tier

In the Guitar Amplifier Heads category, Positive Grid BIAS Head is priced in the upper end of the Standard/Professional range. This is quality gear at a fair price point, suitable for beginners, hobbyists, and pros alike.

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Description

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Dive into a world of sonic possibilities with the Positive Grid BIAS Head, a revolutionary guitar amplifier head that bridges the gap between traditional amp tones and cutting-edge digital innovation. This powerhouse is not just another modeling amp; it's a sonic sculptor designed for musicians who crave endless tonal flexibility. At its core, the BIAS Head boasts Amp Match technology, which allows you to capture the essence of your favorite amplifiers by analyzing and replicating their unique characteristics with precision. Whether you're chasing the bright, glassy tones of a classic British amp or the deep, thunderous roar of modern metal, the BIAS Head delivers with unparalleled accuracy.

Powered by a robust Class D amplifier, this unit offers exceptional clarity and power, making it perfect for both studio sessions and live performances. With its intuitive interface, you can easily tweak and mold your sound via the BIAS software, offering an extensive library of amp models, cabinets, and effects to explore. The BIAS Head's seamless integration with the Positive Grid community means you're not just buying an amp; you're joining a collective of musicians dedicated to pushing the boundaries of sound.

Key Features:

Revolutionary Amp Match technology for precise tonal replication
Class D power amp for high fidelity and dynamic response
Intuitive software interface with customizable amp models and effects
Seamless integration with Positive Grid's online community
Lightweight and portable design suitable for gigs and studio work

Product specs

Brand	Positive Grid
Model	Bias Head Amplifier
Finish	Silver/Black
Year	2010s
Categories	Guitar Heads
Electronics	Solid State
Impedance	16 ohms, 4 ohms, 8 ohms
Number of Channels	1 Channel
Number of Inputs	1 Input
Output Power (Watts)	600
Power Tube Type	None
Reverb	None

FAQs

What type of amplifier is the Positive Grid BIAS Head?: The Positive Grid BIAS Head is a solid-state guitar amplifier head, known for its digital modeling capabilities, allowing users to customize and simulate different amp tones.
How much power does the Positive Grid BIAS Head deliver?: The Positive Grid BIAS Head delivers 600 watts of power, making it suitable for both studio use and live performances.
Can the Positive Grid BIAS Head be used with different speaker cabinets?: Yes, the Positive Grid BIAS Head is compatible with speaker cabinets of varying impedances, including 4 ohms, 8 ohms, and 16 ohms.
Does the Positive Grid BIAS Head have built-in reverb?: No, the Positive Grid BIAS Head does not have built-in reverb, focusing instead on amp modeling and tone customization features.
Is the Positive Grid BIAS Head suitable for live performances?: Yes, with its 600-watt output and versatile amp modeling capabilities, the Positive Grid BIAS Head is well-suited for live performances and can handle a variety of musical styles.

Videos

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Andertons Music Co

Kemper vs Positive Grid Bias Head

Andertons Music Co

Positive Grid Bias Head Demo with Chappers & the Capt!

Rob Chapman

Positive Grid Bias Head Amp Review - Tom Quayle

Guitar Interactive Magazine

GAK DEMO : In Depth Positive Grid BIAS Head Demo At GAK

GAK

Vernon Reid on BIAS Head amplifier

Positive Grid

BIAS Head Reverb Overview | Positive Grid

Positive Grid

Positive Grid BIAS Mini & BIAS Head.

GUITARGUITAR

Positive Grid BIAS Head Overview | Full Compass

Full Compass

Reviews

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PROS

Seamlessly integrates with BIAS Amp software for advanced sound customization
Capable of mimicking multiple famous amp models accurately
Loud enough for live performances and quiet enough for bedroom practice
Versatile use for both guitar and bass with 300-watt power
Allows extensive tweaking of power amp and tube stages
Features a strong online community for sharing and downloading amp presets
Offers flexibility with presets that don't always require the software
Compact size yet delivers big, powerful sounds
Suitable for tech enthusiasts who enjoy detailed sound customization
Comparable in quality to high-end models like AxeFx and Kemper

CONS

Limited to one speaker out jack; may need modifications for multiple cabs
Reverb effect can be overwhelmingly boomy at higher settings
Distortion settings may not satisfy users seeking high-quality crunch
Only one input, limiting stereo guitar usage
Requires proprietary or costly footswitches for full functionality
Includes a low-quality protective cover
Lacks the "organic" feel of a true analog amp
Initial settings may require significant tweaking for optimal sound

Owner Insights

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

Features and functionality

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The bass and guitar versions of the BIAS Head primarily differ by one knob's function, yet both can access all guitar tones.
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The Bias Head surpasses the Spark in amp simulation capabilities but is limited to reverb and a noise gate for built-in effects.
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The Bias Head's lack of impulse response capabilities limits its versatility compared to newer modelers with this feature.
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Software and compatibility

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BIAS Amp 2 professional software is available for free download, even for non-original owners.
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Mods and upgrades

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A cheap MIDI pedal can effectively substitute for hard-to-find Bluetooth foot pedals for channel switching.
Source

Use cases and applications

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Owners add external effects processors like the Pod HD 500 or Boss GT-10 for effects and MIDI control, enhancing the BIAS Head's versatility.
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The Bias Head is considered an option for home use and experimentation, but it may not satisfy those continuously seeking new gear for diverse sound exploration.
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The Bias Head is regarded as a versatile amp head option, particularly in setups that prioritize amp simulation over integrated effects.
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Value and pricing

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Prices range significantly from $299 to $1,000, with some owners considering lower-priced units a worthwhile purchase despite limited features.
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The Atomic Amplifirebox, at $300, is noted for its compact size and ease of use, presenting a cost-effective alternative for those focused on amp modeling over effects.
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User experience

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Some users report limited buzz due to the absence of built-in effects, suggesting a potential drawback for those seeking comprehensive features.
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Some users find the Bias Head difficult to dial in a great sound, noting it offers many mediocre sounds but struggles to deliver truly exciting tones.
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Comparisons

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The Bias Head's gain is critiqued for a high-mid harmonic "fizzy edge," reminiscent of older Line-6 models, which some find challenging to adjust satisfactorily.
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The Kemper is preferred for its gritty blues tones, particularly its rendition of the Blues Jr., which is often a digital amp challenge.
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The Atomic Amplifirebox is praised for its superior amp modeling compared to the Helix, offering simplicity and reliability in achieving good sounds.
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Users suggest Line 6 Helix paired with an FRFR speaker for optimal versatility, emphasizing impulse responses as a key component of tone.
Source

Critic Reviews

Positive Grid Bias Head

soundonsound.com

The Positive Grid BIAS Head impresses with its high-quality build and authentic amp modeling, offering a deep level of tweakability via its intuitive interface. It delivers a satisfying near-tube amp experience, especially when paired with a guitar cab. However, the absence of onboard effects and some routing limitations may disappoint those seeking a comprehensive all-in-one solution. Overall, it’s a standout option for those prioritizing sound customization and quality.

positive

Full Review

Positive Grid BIAS Head (Powered Version) review | MusicRadar

musicradar.com

The Positive Grid BIAS Head impresses with its excellent low-latency digital amp simulation and superb app integration, making it a worthy option for live and studio use. It allows for near-zero latency operation with a powerful 600-watt output, providing users with ample customization through its intuitive interface and ToneCloud access. However, the absence of built-in effects, apart from reverb, might be a drawback for some. Despite its high price, the BIAS Head offers a compelling blend of hardware and software, delivering realistic amp tones and dynamics that closely mimic real valve circuits. Overall, it stands as a valuable tool for digital modellers.

positive

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5.0 out of 5

Based on 1 Review and 5 Ratings

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bradd_91

over 8 years ago

Excellent value for money, next to real tone

This head is incredible. Easily in the same realm as the AxeFx or Kemper. Definitely one for the geeks who like to explore and fine tune every small detail of their gear, without the risk of destroying it.