COOLMUSIC BP-MINI Battery Powered Acoustic Guitar Amplifier User Manual

1. Product Overview

The COOLMUSIC BP-MINI is a versatile, battery-powered acoustic guitar amplifier designed for portability and high-quality sound. It features 30 Watts of output, a 6.5-inch speaker, and includes built-in reverb and chorus effects. With two input channels for instruments and microphones, Bluetooth connectivity, and a rechargeable lithium battery, it's suitable for various applications from street performances to home practice.

Four COOLMUSIC BP-MINI amplifiers in different colors: white, black, blue, and red.

Figure 1: COOLMUSIC BP-MINI Amplifier in various colors.

Video 1: Product demonstration of the COOLMUSIC BP-MINI amplifier, showcasing its portability and controls.

2. Setup

2.1 Charging the Amplifier

The BP-MINI features a built-in large capacity rechargeable lithium battery. Before initial use, ensure the amplifier is fully charged.

Connect the provided USB cable to the DC-IN (5V/2A) port on the rear panel of the amplifier.
Connect the other end of the USB cable to a compatible 5V/2A USB power adapter (not included) or a power bank.
The charging indicator light will show the charging status. A full charge typically takes approximately 3 hours.
Once fully charged, the amplifier can provide 6-8 hours of working time.

COOLMUSIC BP-MINI amplifier with a battery icon and a person playing guitar in the background, illustrating its rechargeable feature.

Figure 2: Amplifier with battery icon, highlighting its rechargeable capability.

2.2 Attaching/Detaching the Speaker Strap

The BP-MINI comes with a detachable speaker strap for easy portability.

To attach: Align the strap's fasteners with the attachment points on the sides of the amplifier and secure them.
To detach: Unfasten the strap from the amplifier. The strap can be replaced with a longer one if desired.

COOLMUSIC BP-MINI amplifier with its detachable speaker strap shown separately.

Figure 3: Detachable speaker strap for the BP-MINI amplifier.

3. Operating Instructions

3.1 Control Panel Overview

The top panel of the BP-MINI features controls for both the microphone and guitar channels, along with master volume and power controls.

Close-up view of the COOLMUSIC BP-MINI amplifier's control panel, showing knobs for Volume, Bass, Treble, Reverb, and Chorus for both Microphone and Guitar inputs, as well as a master Volume and Power switch.

Figure 4: Top control panel of the BP-MINI amplifier.

Controls:

MIC Input: 6.35mm input for microphone.
GUITAR Input: 6.35mm input for guitar.
VOLUME (MIC/GUITAR): Adjusts the input level for each channel.
BASS (MIC/GUITAR): Adjusts the low-frequency response for each channel (-15 to +15).
TREBLE (MIC/GUITAR): Adjusts the high-frequency response for each channel (-15 to +15).
CHORUS (GUITAR): Adds a chorus effect to the guitar channel.
REVERB (MIC/GUITAR): Adds a reverb effect to both channels.
VOLUME (Master): Overall output volume control.
POWER: On/Off switch for the amplifier.
B.T. MODE: Bluetooth indicator and mode button.

3.2 Connecting Instruments and Microphones

Ensure the amplifier is powered off and all volume knobs are set to minimum.
Connect your microphone to the MIC input using a 6.35mm cable.
Connect your acoustic guitar or other instrument to the GUITAR input using a 6.35mm cable.
Power on the amplifier using the POWER switch.
Slowly increase the individual channel VOLUME knobs and the master VOLUME knob to your desired level.
Adjust BASS, TREBLE, REVERB, and CHORUS (for guitar) controls to shape your sound.

3.3 Bluetooth Connectivity

The BP-MINI supports Bluetooth 5.0 for wireless audio playback.

Power on the amplifier.
Activate Bluetooth on your smartphone, tablet, or laptop.
Search for available Bluetooth devices and select "BP-MINI" to pair.
Once paired, you can play accompaniment music through the amplifier.
Adjust the Bluetooth volume using the dedicated VOLUME knob on the amplifier's control panel.

COOLMUSIC BP-MINI amplifier next to a smartphone displaying its Bluetooth settings, showing a successful connection.

Figure 5: Bluetooth pairing with the BP-MINI amplifier.

3.4 Rear Panel Connections

The rear panel provides additional connectivity options:

Rear view of the COOLMUSIC BP-MINI amplifier, showing ports labeled HEADPHONE, DC-IN (5V/2A), D.I., and AUX IN.

Figure 6: Rear panel connections of the BP-MINI amplifier.

PHONES: 6.35mm headphone output for silent practice.
DC-IN (5V/2A): USB input for charging the amplifier.
D.I. Out: 6.35mm output for connecting to a mixer or recording interface.
AUX IN: 3.5mm auxiliary input for connecting external audio devices (e.g., MP3 players, computers).

4. Maintenance

4.1 General Care

Keep the amplifier clean by wiping it with a soft, dry cloth. Avoid using abrasive cleaners or solvents.
Protect the amplifier from extreme temperatures, humidity, and direct sunlight.
Avoid dropping or subjecting the amplifier to strong impacts.
When not in use for extended periods, store the amplifier in a dry, cool place.

4.2 Battery Care

To prolong battery life, avoid completely discharging the battery frequently.
Charge the battery regularly, even if the amplifier is not used often.
If storing for a long time, charge the battery to about 50% and recharge every few months.

5. Troubleshooting

Problem	Possible Cause	Solution
No sound output	Amplifier not powered on. Volume knobs set too low. Instrument/microphone cable faulty or improperly connected. Battery is low or depleted.	Ensure power switch is ON. Increase channel and master volume knobs. Check all cable connections and try a different cable. Charge the amplifier.
Bluetooth not connecting	Bluetooth not enabled on device. Amplifier not in pairing mode or already connected to another device. Device too far from amplifier.	Enable Bluetooth on your device. Ensure the amplifier is discoverable. Disconnect from other devices if necessary. Move your device closer to the amplifier (within 10 meters).
Distorted sound	Volume levels too high (input or output). Faulty instrument/microphone.	Reduce channel and master volume levels. Test with a different instrument/microphone.

6. Specifications

Feature	Specification
Output Wattage	30W
Speaker Configuration	6.5-inch Woofer, 1.5-inch Tweeter
Channels	2-input (Instrument, Microphone)
Effects	Reverb, Chorus (Guitar), 2-band EQ (Bass/Treble)
Wireless Connectivity	Bluetooth 5.0
Battery Type	Built-in Rechargeable Lithium Polymer (4 batteries required internally)
Charging Time	Approx. 3 hours
Working Time (Full Charge)	6-8 hours
Inputs	6.35mm MIC, 6.35mm GUITAR, 3.5mm AUX IN, 5V/2A USB (for charging)
Outputs	6.35mm PHONES, 6.35mm D.I. Out
Case Material	Wood
Dimensions (L x W x H)	9.06 x 7.09 x 7.87 inches (23 x 18 x 20 cm)
Weight	Approx. 3.5 kg (7.7 lbs)

Diagram showing various musical instruments like guitars, keyboards, drums, saxophone, cello, and traditional Chinese instruments, indicating compatibility with the amplifier.

Figure 7: The BP-MINI amplifier is compatible with a wide range of musical instruments.

7. User Tips

Versatile Use: The BP-MINI is highly suitable for street-corner musicians due to its portability and battery power, as well as for home studio guitarists looking for a compact amplifier with built-in effects.
Sound Customization: Experiment with the Bass, Treble, Reverb, and Chorus controls on both channels to find your desired sound. The 2-band EQ on the microphone channel can help in voice modification.
Power Bank Charging: For extended outdoor use, you can charge the amplifier using a power bank connected to the USB DC-IN port.

8. Warranty and Support

For any questions, technical support, or warranty claims regarding your COOLMUSIC BP-MINI amplifier, please contact the seller or manufacturer directly. Keep your proof of purchase for warranty validation.