1. Introduction
The BOSS Katana-210 Bass Amplifier (KTN210B) is a versatile combo bass amp designed for serious bassists. It delivers premium sound and advanced features, drawing from the acclaimed Katana guitar amp series. This amplifier features three unique amp characters, onboard BOSS effects, 160 watts of class AB stage power, and a high-performance speaker system with two 10-inch woofers. Comprehensive EQ and flexible connectivity options make it suitable for various playing situations, from stage performances to studio recording and home practice.

Figure 1: Front view of the BOSS Katana-210 Bass Amplifier.
2. Key Features
- Versatile Combo Bass Amp: Offers stage-ready sound and advanced features.
- Powerful Output: 160-watt class AB power amp for big, punchy tone.
- High-Performance Speakers: Rock-solid cabinet with two custom 10-inch woofers and a high-frequency tweeter with on/off switch.
- Three Amp Voicings: Selectable amp voicings cover a wide range of styles.
- Shape Switch: Three tone characters (mid scoop, bright, and extended range) for versatile sound shaping.
- Four Independent Effect Sections: Includes compressor, drive, and FX1/FX2 with a vast range of selectable effects.
- Comprehensive Four-Band EQ: Features selectable low and high-mid frequency controls.
- Studio-Inspired Blend Section: Mixes in the dry sound for enhanced fatness and clarity.
- Six Memory Slots: For storing and recalling favorite sound setups.
- Power Control: Realizes cranked-amp volume in any playing situation.
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.
- Avoid placing the amplifier in direct sunlight, near heat sources, or in areas with excessive humidity or dust.
3.2 Connecting Your Instrument
- Ensure the amplifier's power switch is in the OFF position.
- Connect your bass guitar to the INPUT jack on the front panel using a standard 1/4-inch instrument cable.
3.3 Power Connection
- Connect the supplied AC power cord to the AC IN jack on the rear panel of the amplifier.
- Plug the other end of the power cord into a suitable AC outlet.

Figure 2: Rear panel connections of the BOSS Katana-210 Bass Amplifier.
4. Operating Instructions
4.1 Powering On/Off
- Turn the MASTER VOLUME knob to its minimum position.
- Press the POWER switch to turn on the amplifier. The power indicator will illuminate.
- To turn off, press the POWER switch again.
4.2 Basic Controls
- INPUT: Connect your bass guitar here.
- GAIN: Adjusts the input sensitivity and drive level for the amplifier section.
- VOLUME: Controls the overall output volume of the amplifier.
- MASTER VOLUME: Controls the final output volume.
- POWER CONTROL: Allows you to achieve cranked-amp tones at lower volumes (e.g., 0.5W, 1W, 50W, MAX).

Figure 3: Top panel controls of the BOSS Katana-210 Bass Amplifier.
4.3 Amp Voicings and Shape Switch
- Select one of the three amp voicings (VINTAGE, FLAT, MODERN) to suit your desired tone.
- Use the SHAPE switch to further refine your tone with Mid Scoop, Bright, or Extended Range characteristics.
4.4 Equalizer (EQ)
- Adjust the BASS, LOW MID, HIGH MID, and TREBLE knobs to shape your sound.
- The LOW MID and HIGH MID controls offer selectable frequency ranges for precise tonal adjustments.
4.5 Effects
- Engage and adjust the COMPRESSOR and DRIVE effects for dynamic control and grit.
- Utilize the FX1 and FX2 sections to access a wide range of additional BOSS effects.
4.6 Memory Functions
- The amplifier features six memory slots to store and recall your favorite sound setups (amp voicing, EQ, effects, etc.).
- Refer to the detailed owner's manual for specific instructions on saving and recalling memories.
4.7 Official Product Video: BOSS Katana 210 Bass
Video 1: An official demonstration of the BOSS Katana-210 Bass Amplifier's features and sound capabilities.
5. Maintenance
5.1 Cleaning
- Wipe the exterior of the amplifier with a soft, dry cloth.
- Do not use abrasive cleaners, waxes, or solvents, as these can damage the finish.
5.2 Storage
- When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
- Cover the amplifier with a dust cover to protect it from dust and debris.
5.3 Speaker Care
- Avoid exposing the speakers to excessive moisture or extreme temperature changes.
- Do not place heavy objects on the speaker grille.
6. Troubleshooting
6.1 No Sound
- Check if the amplifier is powered on and the power indicator is lit.
- Ensure your instrument cable is securely connected to both your bass and the amplifier's INPUT jack.
- Verify that the VOLUME and MASTER VOLUME knobs are turned up.
- Test with a different instrument cable or bass guitar to rule out faulty equipment.
6.2 Distorted or Unclear Sound
- Adjust the GAIN knob. If it's too high, it can cause distortion.
- Check your EQ settings. Extreme bass or treble settings can sometimes lead to unwanted distortion.
- Ensure the speaker grille is not obstructed.
6.3 Hum or Noise
- Ensure all cables are properly shielded and in good condition.
- Try plugging the amplifier into a different electrical outlet, preferably one on a different circuit.
- Move the amplifier away from other electronic devices that might be causing interference.
7. Specifications
- Output Wattage: 160 Watts
- Item Model Number: KTN210B
- Product Dimensions: 27.88 x 24 x 18.92 inches
- Item Weight: 20 pounds
- Brand: BOSS
- Manufacturer: BOSS
- Color: Black
- Material: Wood
- Compatible Devices: Double Bass
- Date First Available: March 16, 2022
8. Warranty and Support
For warranty information and technical support, please refer to the official BOSS website or contact your local authorized BOSS dealer. Keep your purchase receipt as proof of purchase for warranty claims.





