QFX BT-90 Portable PA System User Manual
- June 6, 2024
- QFX
Table of Contents
BT-90
Manual
This product is designed for teachers, tour guides, shopping guides, and other personnel. BT-90 has high fidelity sound, a wide frequency response, low distortion, stable performance, low noise, and low power consumption. Designed for intelligent power efficiency and low voltage power protection. It’s beautiful and has a smooth appearance design. It’s small and convenient for transportation with simple operations. Perfect for teaching, outdoor speech, and public communication activities.
PRODUCT FEATURES
Microphone, Amplifier, Charger with multiple functions, and a Miniature
Digital Amplifier.
The comprehensive application of electro-acoustic technology and digital audio
technology, show excellent sound quality and howling suppression abilities.
Using the high-efficiency power amplifier (the output power is 10W) the sound
projects loud and clear. the low power circuit design allows for battery life
of up to 20 hours or more (Depending on usage).
The BT-90 has a built-in automatic charging control circuit with a saturation
indication function of the large-capacity lithium-ion rechargeable battery.
Hanging rope and waist design for comfort and easy use. The shell is made of
ABS engineering material for durability. The BT-90 supports .MP3 playback as
an added feature to the PA function.
METHOD OF USE
- Make sure the battery is fully charged before using the equipment. When the battery indicator light flashes, please connect the charge audio cable to the power plug socket DC-SV. About 8-10 hours after charging, the indicator will be turned off to represent the full power.
- When in use, if the ON/OFF button is toggled to the OFF direction, the equipment will be off.
- When power is on, plug in the headset microphone, then you can speak directly or play the music, plug in the microphone and speak directly.
- Insert TF card, it will play music files from the card automatically.
- Insert a memory card, it will play music from the card automatically.
Note
- Maintain the headset microphone distant from the unit when in use to avoid feedback.
- In case of rain immediately unplug the battery.
- Remember to turn off the equipment when not in use and please keep it in a dry area.
- In order to achieve good results, please do not use the headset mic while charging the equipment, it’s dangerous. 5. When the volume becomes softer or the power indicator light flashes, please plugin and charge the equipment.
TECHNOLOGY
| Frequency response: | 80Hz-12Khz |
|---|---|
| Output power: | 3W |
| Speaker impedance: | 4 ohm |
| Working voltage: | 3.SV-4.7V |
| Battery specifications: | 1200mAh, rechargeable lithium-ion battery |
| External charger: | SV charger |
| Charging time: | About 8-10 hours |
| Use time: | About 2-3 hours (related to the volume and environmental |
temperature)
BT Connection
- Power on the unit. The system will report and confirm the current working mode is BT function. If not, the user can press the mode button to change the working mode.
- Turn on the mobile device’s Bluetooth and search to pair with the unit system BT device.
- The BT-81 should now be paired with the mobile device for Bluetooth usage. If connection pairing fails, begin the connection process again.