Positive Grid Bias Head Guitar Amp
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 Positive Grid BIAS Head is a 600W Class-D amp head that captures legendary tube amp character in an 11.6-pound toaster-sized package, with intuitive front-panel controls for dialing in articulate cleans to saturated drives, plus real-time speaker and mic placement simulation. Built for intermediate to professional players who gig and record, it delivers the tonal responsiveness of a traditional amp with the routing flexibility and preset recall of digital modeling—USB, XLR/TRS outputs, dual footswitches, and MIDI connectivity make it road-ready and studio-friendly. Choose this if you want tube amp feel without lugging a heavy head, the ability to capture your exact tone as a preset, and the option to run direct to a mixing console or power amp on the same gig.
Who This Is For
Great for
- ✓ Studio Sessions
- ✓ Home Recording
- ✓ Live Performance
- ✓ Gigging
Not the best pick for
- – Practice
- – First Serious Guitar
Skill level: Intermediate · Advanced · Professional
Frequently Asked Questions
What's the difference between the BIAS Head and traditional tube amp heads?
The BIAS Head uses Class-D digital modeling to capture tube amp character in a lightweight 11.6-pound package, letting you experiment with speaker simulations and mic placements in real-time via software. You get 25 custom presets, nine reverbs, and the full BIAS Amp Pro software license for component-level amp design—switching tones during a gig or session is one footswitch press away, which a tube head cannot do.
Can I use this in the studio and live on the same rig?
Yes. The BIAS Head includes dual XLR and TRS line outputs, USB connectivity, and headphone out for studio tracking, and 600W Class-D amplification (850W at 4Ω) plus dual footswitches and MIDI connectivity for live performance through a cabinet or direct to a PA.
What's included and do I need to buy anything extra?
The BIAS Head includes 25 onboard presets, nine reverbs, full BIAS Amp Pro software license for Mac/PC, and all connectivity (USB, Bluetooth, MIDI, XLR/TRS outputs, headphone out, mono effect loop). You will need a speaker cabinet if you want to perform live through a traditional amp rig, but can record direct to USB without one.
How does this compare to Line 6 Helix or Kemper Profiler Head?
The BIAS Head prioritizes simplicity with intuitive front-panel controls (gain, EQ, presence, master, Modern/Vintage switch) and real-time speaker simulation over deep menu diving. Helix and Kemper Profiler offer more extensive effects and amp library, so choose BIAS if you want quick, responsive tone-shaping; choose Helix or Kemper if you need a comprehensive effects processor and larger amp collection.
Is this suitable for a beginner or first serious amp?
The BIAS Head is designed for intermediate, advanced, and professional players. If you are buying your first serious amp, a simpler tube head or smaller combo amp may be a better starting point; the BIAS Head shines once you understand tone-shaping and want preset recall and portability.
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