Positive Grid Bias Head Guitar Amp
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600-watt Amp Match Amplifier Head w/cover
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- SKU
- BIAS-Head
. Description
Positive Grid BIAS Head Guitar Amp
The BIAS Head delivers responsive, articulate amplification in a compact toaster-sized form factor that weighs just 11.6 pounds. Its intuitive front-panel controls—gain, bass, middle, treble, presence, master, and Modern/Vintage voicing switch—let you dial in everything from pristine cleans to saturated drives without diving into menus. The amp captures legendary tube amp character while offering the flexibility of digital modeling, letting you experiment with speaker simulations and mic placements in real-time.
Power & Connectivity
The 600W Class-D power amp delivers 850W at 4Ω, 600W at 8Ω, and 300W at 16Ω speaker output, providing plenty of headroom for both studio and stage use. Connectivity spans dual L-R line outputs (XLR and TRS jacks), headphone output, mono effect loop, MIDI in/out/thru, USB for Mac/PC, Bluetooth wireless, and two footswitch inputs—giving you multiple routing options for recording direct or running through a speaker cabinet.
Sound Design & Presets
Twenty-five onboard custom amplifier presets get you started immediately, while nine built-in reverbs add spatial character to your tone. The included BIAS Amp Pro software license unlocks component-level amp design capability from the front panel, letting you modify and create custom presets that capture your exact sonic vision.
Key Features
- 600W Class-D power amp with 850W at 4Ω output
- 25 onboard custom amplifier presets
- Front-panel controls: gain, bass, middle, treble, presence, master, Modern/Vintage voicing switch
- Nine different built-in reverbs
- Dual XLR and TRS line outputs plus headphone output
- Mono effect loop with TS jacks
- MIDI in/out/thru connectors
- USB connectivity for Mac and PC
- Bluetooth wireless capability
- Two footswitch inputs (TRS jacks)
- Full BIAS Amp Pro software license included
- Weighs 11.6 pounds with compact form factor
The BIAS Head combines lightweight portability with serious amplification, making it equally at home in a bedroom studio or on a professional rig.
More Information
| Condition | New |
|---|---|
| Country of Manufacture | Taiwan |
Reviews
At a Glance
The BIAS Head is a 600W Class-D amp head that delivers responsive tube amp character with immediate front-panel controls—no menu diving—and captures everything from pristine cleans to saturated drives. Built for gigging musicians and studio players alike, it pairs digital modeling flexibility with straightforward tone-shaping (gain, EQ, presence, voicing switch) and ships with 25 presets and nine reverbs to get you stage-ready fast. Choose it for road reliability in a compact footprint, serious headroom for any venue, and the option to dig deeper into custom amp design via included BIAS Amp Pro software when you're ready.
Who This Is For
Great for
- ✓ Studio Sessions
- ✓ Home Recording
- ✓ Live Performance
- ✓ Gigging
Skill level: Intermediate · Advanced · Professional
Frequently Asked Questions
What's included in the BIAS Amp Pro software license?
The full BIAS Amp Pro software license is included with the BIAS Head, unlocking component-level amp design capability so you can modify existing presets or create custom amplifiers from scratch that capture your exact sonic vision.
Can I record direct to a computer or audio interface?
Yes. The BIAS Head includes USB connectivity for Mac and PC, plus dual XLR and TRS line outputs, allowing you to record directly into your DAW or route the amp to an external interface or PA system.
How much power does this amp deliver, and is it enough for live performance?
The 600W Class-D power amp outputs 850W at 4Ω, 600W at 8Ω, and 300W at 16Ω, providing serious headroom for both intimate studio sessions and professional stages, and you can run it with or without an external speaker cabinet.
What controls are on the front panel?
Front-panel controls include gain, bass, middle, treble, presence, master volume, and a Modern/Vintage voicing switch—all the essential tone-shaping tools without requiring menu navigation.
Can I use wireless footswitches or MIDI controllers?
The BIAS Head includes two TRS footswitch inputs for wired control, plus MIDI in/out/thru connectors and Bluetooth wireless capability for flexible live or studio control options.
Do I pay sales tax on this order?
We collect sales tax only on orders shipped to California. Orders shipped to any other US state are charged $0 sales tax at checkout when you buy direct from our website. On this item that is roughly $91 less out the door than the same listed price at a national retailer or on a marketplace. Marketplaces such as eBay, Reverb and Amazon collect sales tax in nearly every state as marketplace facilitators no matter who the seller is, so the same item at the same price costs less bought direct. Free US shipping and 30-day returns are included. Some states ask buyers to self-report use tax on out-of-state purchases.
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