Feedback Suppression
When the PHASE INVERTER is turned on or not, pressing and holding the PHASE INV / A.F.BACK SCAN switch activates the main unit's FEEDBACK suppressing function and enters auto-search mode. The unit will not be controlled by the main unit's ANTI-FEEDBACK knob in this mode.
When ANTI-FEEDBACK is turned on, the footswitch pedal's ANTI-F.BACK indicator will flicker according to the main unit's indicator. The system enters auto-search preparation status. Tapping the PHASE INV / A.F.BACK SCAN switch initiates feedback frequency search. The ANTI-F.BACK indicator will flicker quickly during search. If the search is successful, the indicator will return to a slow-flicker status. If the search fails, the indicator will flicker every second. To restart the search, tap and hold the PHASE INV / A.F.BACK SCAN switch again.
To exit and turn off the FEEDBACK suppressor, tap and hold the PHASE INV / A.F.BACK SCAN switch until the ANTI-F.BACK indicator goes out, then turn off the unit.
Note: The panel's ANTI-FEEDBACK knob is disabled when the footswitch pedal is connected. Feedback suppression is controlled via the footswitch pedal's auto-search function.
Effect Knobs
CHORUS/G-VERB/DELAY Knobs: These three knobs control the main unit's CHORUS, REVERB, and DELAY effects modules. Operation is the same as on the main unit panel.
M-VERB Knob: This knob controls the microphone channel's reverb effect. Operation is the same as on the main unit panel.
Bluetooth Connection
The amplifier features a built-in Bluetooth communication unit, allowing connection to devices with Bluetooth for music playback. Refer to the instructions below for details.
Instructions:
- Long press the Bluetooth switch to turn on Bluetooth. The Bluetooth indicator will be blue and flicker continuously.
- On your mobile device, turn on Bluetooth and find "JOYO BSK-80" in the device list to pair. Once connected, the Bluetooth indicator on the amplifier will turn solid blue.
Diagram Description: An illustration shows a mobile phone connecting wirelessly to the JOYO BSK-80 amplifier via Bluetooth.
Setup: To position the amplifier for optimal use, insert the support bracket into the BSK-80's designated support hole, allowing you to prop up the amplifier with ease.
Diagram Description: An image depicts the JOYO BSK-80 amplifier placed on a stand, with a textual callout indicating to insert the support bracket into the amp's support hole for easy propping.
Battery Maintenance
When the power indicator (POWER) changes from red to blue, the battery needs charging. Turn off the power switch (NO/OFF) before connecting the attached power cable to the DC 24V/3.75A port.
The battery indicator (BATTERY) will show yellow while charging and turn off automatically when fully charged. Note: Do not disconnect power during charging to prevent battery damage. The unit can be operated while charging.
- If the amplifier will not be used for an extended period, ensure the battery is charged above 80%. Recharge the battery every two months to prevent aging.
- Charge the battery promptly when the power indicator (POWER) changes from red to blue.
- If the amplifier operates for less than 1 hour after a full charge (under normal use), the battery may need replacement.
Parameters
- AC adapter input voltage
- AC100-240V 50-60Hz
- AC adapter output voltage
- DC 24V/3.75A
- Battery's specification
- 18.5V/6.6Ah (lithium battery)
- Guitar input sensitivity
- -11.5dBV 1MΩ
- Microphone input sensitivity
- -41dBV 5.6KΩ
- AUX IN sensitivity
- -11.5dBV 2.2KΩ
- PORT Jack output impedance
- 6.1KΩ
- Headphone output impedance
- 32Ω
- LINE IN Jack input impedance
- 10KΩ
- LINE OUT Jack output impedance
- 100Ω
- BALANCED OUT Jack output impedance
- 1KΩ
- RMS Power
- 80W
- Bass unit
- 10 inches, 4Ω, 70W
- Treble unit
- 3 inches, 4Ω, 30W
- Pedal - Guitar channel effects
- CHORUS, DELAY (max 500ms), REVERB
- Pedal - MIC channel effect
- REVERB
- Dimensions
- 50x29x37.5cm
- Weight
- 14.2kg
Package Content
- BSK-80 Amplifier x 1
- Power adapter x 1
- Power cord x 1
- Footswitch pedal x 1
- 6.35mm footswitch pedal connecting cable x 1
- 3.5mm TRRS audio cable x 1
- User manual x 1
Manufacturer Information
JOYO TECHNOLOGY CO., LTD
Address: 2/F, Lushi Industry Building, 28th District, Bao'an, Shenzhen, 518101 China.
Website: www.joyoaudio.com
Email: info@joyoaudio.com
Tel: 0086-755-29765381
FCC Warning Statements
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If this equipment causes harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Caution: Any changes or modifications to this device not explicitly approved by the manufacturer could void your authority to operate this equipment.
This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.
The device has been evaluated to meet general RF exposure requirements. This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of 20cm between the radiator and your body.
