BIAS Head/Rack — Troubleshooting Guide – Help Center

Use this guide to diagnose and resolve common issues with your BIAS Head/Rack. Work through the relevant section below before contacting support.

Back up your presets before performing a factory reset. Refer to How to Backup Amp Presets.

Noise Issues (Hum / Hiss)

See the dedicated article: Why Do I Have Unwanted Hums and Hiss Coming from My Amp?

No Sound from Speaker Output

See the dedicated article: There's No Sound on the Speaker Output, What Can I Do?

Sound Quality Issues

Back up your presets, then perform a Factory Reset.
Update the firmware to the latest version.
Test with a different guitar cable and a different guitar to isolate the source.
If using pedals, remove them from the signal chain and test direct to rule out interference.

Preset Issues

Back up your presets, then perform a Factory Reset.
Update the firmware to the latest version.
Ensure you are running the latest version of BIAS Amp 2 on your device.
If presets fail to upload from ToneCloud, check your internet/Wi-Fi connection and retry.

Connection Issues (USB / Bluetooth)

Ensure BIAS Amp 2 is updated to the latest version.
For Bluetooth issues, go to your device’s Bluetooth settings, unpair BIAS Head/Rack, and reconnect fresh from within the BIAS Amp 2 app.
For USB issues, try a different USB cable and a different USB port.
Restart both your device and the BIAS Head/Rack.
If Bluetooth is still not detected, refer to: BIAS Amp 2 App Does Not Detect BIAS Head/Rack via Bluetooth.

LED Issues

Back up your presets, then perform a Factory Reset.
Update the firmware to the latest version.
If the LED remains unresponsive or shows unexpected behavior after the above steps, contact support.

MIDI Issues

Confirm your MIDI controller is sending on the correct MIDI channel.
Check the MIDI cable connections — ensure MIDI Out of controller connects to MIDI In on BIAS Head/Rack.
Review your MIDI CC/PC assignments in BIAS Amp 2 Settings — refer to MIDI Settings for BIAS HEAD / BIAS Rack.
Back up your presets, then perform a Factory Reset and retest.

Still Having Issues?

If the problem persists after working through the steps above, open a support ticket. Please include as much detail as possible: when the issue occurs, your firmware version, guitar type, and any pedals in the signal chain.