Positive Grid BIAS Head Guitar Amp

The BIAS Head delivers responsive, articulate amplification in a compact toaster-sized form factor that feels immediate and intuitive under your fingers. Its 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 menu diving. This 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 serious 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
• Compact toaster-sized form factor

The BIAS Head combines lightweight portability with serious amplification and deep software integration, making it equally at home in a bedroom studio or on a professional rig.