1. Introduction
The Fender Rumble 100 V3 Bass Amplifier is a powerful and portable combo amp designed for bass guitarists. Engineered for optimal performance, it delivers 100 watts of robust bass tone through a 12-inch Eminence Special Design speaker. This amplifier combines classic Fender aesthetics with modern features, making it suitable for practice, studio, and live performances.

Figure 1: Front view of the Fender Rumble 100 V3 Bass Amp.
2. Key Features
- Output Power: 100 watts, providing ample volume for various settings.
- Speaker: Equipped with a 12-inch Eminence Special Design speaker for rich, full bass sound.
- Tone Voicing: Features a newly-developed overdrive circuit and versatile three-button voicing palette (Bright, Contour, Vintage) for diverse tonal options.
- Portability: Designed with a compact and lightweight ported plywood enclosure, weighing approximately 23.3 pounds, making it easy to transport.
- Connectivity: Includes an effects loop and a direct XLR output for seamless integration with other gear.
- Durability: Constructed with a robust stainless steel chassis for long-lasting performance.
3. Setup
3.1 Unpacking and Placement
- Carefully remove the amplifier from its packaging.
- Place the amplifier on a stable, level surface. Ensure adequate ventilation around the unit to prevent overheating.
3.2 Power Connection
- Ensure the amplifier's power switch is in the 'OFF' position.
- Connect the provided power cord to the AC inlet on the rear panel of the amplifier.
- Plug the other end of the power cord into a grounded electrical outlet.
3.3 Instrument Connection
- With the amplifier still off and all volume controls set to minimum, connect your bass guitar to the INPUT jack on the front panel using a standard 1/4" instrument cable.

Figure 2: Top control panel of the Fender Rumble 100 V3 Bass Amp.
4. Operating Instructions
4.1 Front Panel Controls
- INPUT: 1/4" jack for connecting your bass guitar.
- GAIN: Adjusts the input sensitivity and overall preamp drive. Higher settings increase distortion.
- BRIGHT Button: Engages a high-frequency boost for added clarity and sparkle.
- CONTOUR Button: Activates a mid-scoop EQ setting, ideal for modern slap tones.
- VINTAGE Button: Engages a classic, warm Fender bass tone emulation.
- DRIVE: Controls the amount of overdrive/distortion when the overdrive circuit is active.
- LEVEL: Adjusts the output volume of the overdrive circuit.
- BASS: Controls the low-frequency response.
- LOW MID: Adjusts the lower-midrange frequencies.
- HIGH MID: Adjusts the upper-midrange frequencies.
- TREBLE: Controls the high-frequency response.
- MASTER: Overall output volume control for the amplifier.
- AUX IN: 1/8" stereo input for connecting external audio devices (e.g., MP3 player, phone) for practice.
- PHONES: 1/8" stereo output for headphones, allowing for silent practice.

Figure 3: Detail of the Drive control for adjusting overdrive.

Figure 4: Tone Voicing buttons for shaping your sound.
4.2 Rear Panel Connections
- POWER Switch: Rocker switch to turn the amplifier ON or OFF.
- EFFECTS SEND/RETURN: 1/4" jacks for connecting external effects processors. Connect the 'SEND' to your effect's input and the effect's output to the 'RETURN'.
- XLR LINE OUT: Balanced XLR output for connecting the amplifier directly to a PA system, mixing console, or recording interface.

Figure 5: Rear panel connections including power, effects loop, and XLR output.

Figure 6: Detail of the XLR Line Out for professional connections.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Avoid using abrasive cleaners, solvents, or waxes, as these can damage the finish.
- Storage: Store the amplifier in a cool, dry environment away from direct sunlight and extreme temperatures.
- Ventilation: Ensure that the amplifier's vents are not obstructed to allow for proper airflow and prevent overheating.
- Safety: To reduce the risk of electric shock, do not remove the back cover. There are no user-serviceable parts inside. Refer all servicing to qualified service personnel. Do not expose this equipment to rain or moisture.
6. Troubleshooting
- No Sound:
- Check if the amplifier is powered ON.
- Verify that the instrument cable is securely connected to both the bass and the amplifier's INPUT jack.
- Ensure the GAIN and MASTER volume controls are set to an audible level.
- Test with a different instrument cable or bass guitar to rule out equipment issues.
- Distorted Sound:
- Reduce the GAIN control. High gain settings can cause distortion.
- Adjust the DRIVE and LEVEL controls if the overdrive circuit is engaged.
- Check your bass guitar's output level; some active basses can have very high output.
- Hum or Noise:
- Ensure all cables are properly shielded and in good condition.
- Check for proper grounding of the amplifier and other connected equipment.
- Move the amplifier away from other electronic devices that may cause interference.
7. Specifications
| Feature | Specification |
|---|---|
| Output Wattage | 100 Watts |
| Speaker | 1 x 12" Eminence Special Design |
| Product Dimensions (H x W x D) | 23.31 x 18.1 x 20.7 inches |
| Item Weight | 23.3 pounds |
| Power Source | Corded Electric |
| Compatible Devices | Bass Guitar |
| Connector Type | 6.35mm Jack (Input), XLR (Line Out), 1/8" (Aux In, Phones) |
| Material (Chassis) | Stainless Steel |
| Color | Black |
| Model Number | 2370400000 |
8. Warranty and Support
8.1 Warranty Information
The Fender Rumble 100 V3 Bass Amplifier comes with a 2-Year Limited Warranty. Fender amplifiers are designed for players and built with unmatched quality. This warranty covers defects in materials and workmanship for two (2) years from the original purchase date.
8.2 Customer Support
For technical assistance, service, or warranty claims, please contact Fender customer service or visit the official Fender website. You can find more information and resources at the Fender Store.





