Product Overview
The Line 6 FBV Express MkII is a versatile 4-button foot controller designed to provide hands-free control for Line 6 amplifiers and POD processors. It offers robust construction and essential functionalities for guitarists, including channel switching, tap tempo, a chromatic tuner, and a built-in volume/wah pedal.
- Hands-free Control: Enables seamless channel switching and effect control for compatible Line 6 amps and PODs.
- Durable Construction: Features steel footswitches and a rugged chassis built for reliability and constant use.
- Integrated Pedal: Includes a full-sized volume/wah pedal with a toe switch for toggling between functions.
- Essential Features: Provides four channel switches (A, B, C, D), Tap Tempo synchronization for time-based effects, and a chromatic tuner display.
- Connectivity: Connects via an included locking RJ-45 cable and features a USB jack for firmware upgrades.
Setup and Connections
Proper setup ensures optimal performance of your FBV Express MkII foot controller with your Line 6 equipment.
Connecting to Your Amplifier or POD
The FBV Express MkII connects to your Line 6 amplifier or POD processor using the included RJ-45 cable. This cable also provides power to the unit, eliminating the need for an external power supply.
- Locate the RJ-45 port on the rear of your Line 6 amplifier or POD.
- Connect one end of the included locking RJ-45 cable to the 'TO AMP OR POD' port on the FBV Express MkII.
- Connect the other end of the RJ-45 cable to the corresponding port on your Line 6 amplifier or POD. Ensure the connection is secure.

Figure 1: Side view of the FBV Express MkII, highlighting the RJ-45 and USB connection ports.
USB Connectivity for Firmware Updates
The FBV Express MkII features a USB jack primarily used for upgrading the firmware of compatible Line 6 Spider IV and Spider Valve MkII amplifiers. This connection allows the foot controller to act as an interface for your amplifier to connect to Line 6's online update utilities.
- Connect a standard USB cable (not included) from the USB port on the FBV Express MkII to your computer.
- Refer to the Line 6 website or your amplifier's specific manual for instructions on using Line 6 Monkey or other update utilities.
Operating Instructions
The FBV Express MkII provides intuitive control over your Line 6 gear.

Figure 2: Top view of the FBV Express MkII, illustrating the layout of the footswitches and expression pedal.
Channel Switching
Use the four steel footswitches (A, B, C, D) to select presets or channels on your connected Line 6 amplifier or POD. The bright LEDs above each switch indicate the currently active channel.
Tap Tempo and Chromatic Tuner
The FBV Express MkII integrates both Tap Tempo and a chromatic tuner for convenience.
- Tap Tempo: To synchronize time-based effects, simply tap any lit footswitch repeatedly at your desired tempo.
- Chromatic Tuner: To activate the chromatic tuner, hold down any lit footswitch for a few seconds. The display will show the note being played, allowing for precise tuning.
Volume and Wah Control
The burly, full-sized expression pedal provides both volume and wah control.
- Toggle Function: Click the toe switch (the top-most part of the pedal) to toggle between volume and wah modes.
- Control: Move the pedal forward and backward to adjust volume or wah effect intensity, depending on the selected mode.
Maintenance
To ensure the longevity and optimal performance of your FBV Express MkII, follow these general maintenance guidelines:
- Cleaning: Use a soft, dry cloth to wipe down the unit. Avoid abrasive cleaners or solvents that could damage the finish or internal components.
- Storage: Store the foot controller in a dry environment, away from extreme temperatures and direct sunlight.
- Cable Care: Handle the RJ-45 and USB cables carefully. Avoid sharp bends or kinks that could damage the wiring.
Troubleshooting
If you encounter issues with your FBV Express MkII, consider the following common troubleshooting steps. For comprehensive support, please refer to the official user manual.
- No Power/No Response: Ensure the RJ-45 cable is securely connected to both the FBV Express MkII and your Line 6 amplifier/POD. Verify that your amplifier/POD is powered on.
- Footswitches Not Responding: Check for proper cable connection. If using with a new amplifier/POD, ensure compatibility.
- Volume/Wah Pedal Issues: Ensure the toe switch is fully engaged when toggling between volume and wah modes. Calibrate the pedal if necessary (refer to the full user manual for calibration procedures).
- Firmware Update Problems: If experiencing issues with USB connectivity for firmware updates, ensure you have the correct drivers installed on your computer and are using the latest version of Line 6 Monkey software.
- General Troubleshooting: Please refer to page 79 from the official user manual for detailed troubleshooting support.
Specifications
Key technical specifications for the Line 6 FBV Express MkII 4-button Foot Controller:
| Feature | Detail |
|---|---|
| Item Weight | 3.52 ounces (0.1 Kilograms) |
| Product Dimensions | 10 x 13 x 4.5 inches |
| Model Number | FBV Express MKII |
| Compatible Devices | Line 6 Spider IV 75 75-watt 1x12 Modeling Guitar Amplifier (and most Line 6 amplifiers and POD processors) |
| Hardware Interface | USB, RJ-45 |
| Power Source | Self-powered via included locking RJ-45 cable |
| Country of Origin | China |
Warranty and Support
For detailed warranty information and further technical support, please refer to the official Line 6 documentation or contact Line 6 customer service directly.
An official User Manual (PDF) is available for download, providing comprehensive details on all features, advanced settings, and troubleshooting: