QFX PBX-804SM Portable PA Loudspeaker

User Manual

Safety Warnings

To reduce the risk of electric shock, do not remove the cover on this speaker. There are no user-serviceable parts inside. Refer all servicing to a qualified technician.

To prevent fire or electric shock, do not expose this equipment to rain or moisture. Do not store or operate this product near any liquids, heat sources such as radiators, or heat registers. Clean only with a dry cloth. Users should exhibit extra safety when this symbol [⚡] appears in this instruction manual and follow all precautions as they are stated.

Battery Information

PBX-804SM Battery

The PBX-804SM is a lithium battery-powered PA loudspeaker. Ensure the battery is completely charged prior to first use to maximize its lifespan. Once the power adapter is connected to a power source, charging will begin automatically.

Charging typically takes 5-6 hours for a full charge. The unit can power on even with low battery when connected to a power source. The battery indicator light is red while charging and turns off when fully charged. Please disconnect the unit upon completion of charging.

With standard usage, a fully charged battery provides approximately 1-2 hours of playback. The battery can be recharged about 300 times in its lifetime. When not in use, the speaker should always be set to OFF to prevent battery drain. If the unit is unused for prolonged periods, the battery will gradually lose power; it is recommended to fully charge the battery at least every 60 days.

When the battery is completely empty, the unit may not perform at 100% volume immediately upon connection to a power source. It is suggested to charge for a while before using at full volume. The unit may operate and charge simultaneously at a lower volume level, with the volume increasing as charging progresses.

Bluetooth Connectivity

PBX-804SM Bluetooth Mode

To connect via Bluetooth:

1. Open the Bluetooth settings on your phone or device.
2. Find the Bluetooth name of the unit, which is "QFX PBX-804SM".
3. Connect to the device.

After a successful match, you can play music from the speaker. The unit will automatically reconnect to Bluetooth when switching modes.

Product Controls and Features

PBX-804SM Rear Panel

1. Master Volume Knob: Adjusts volume from minimum to maximum. This knob also functions as the Power Switch (ON/OFF).
2. Control Buttons:
   • Previous Track Button: Selects the previous track.
   • Play/Pause Button: Controls playback and is used for TWS connection.
   • Next Track Button: Selects the next track.
   • Mode Button: Short press toggles between AUX, USB, FM, and BT modes. Long press turns the LED light ON/OFF.
3. USB Slot: For connecting USB flash drives.
4. AUX IN: Auxiliary audio input.
5. Microphone Input: For connecting a microphone.
6. Power Supply: DC 5V input.
7. Battery Indicator: Shows the battery status.

PBX-804SM Display System Settings

The LED display screen provides information about the current input mode and playback status.

1. Input Mode: The display shows the current mode (USB/BT/AUX/FM). When a USB flash drive is inserted, the unit automatically switches to USB mode and begins playing MP3 audio files.
2. Track Number: Displays the track number currently playing from the USB drive.
3. FM Mode: Displays FM channels. A short press of the "Play/Pause" button initiates an auto-scan for all available channels.

PBX-804SM Remote Control

1. STANDBY: Puts the unit into standby mode.
2. Input Mode Button: Toggles between USB, FM, AUX, and BT input modes.
3. Mute: Mutes the current audio track.
4. PLAY/PAUSE: Controls playback (play, pause, resume).
5. Previous Track: Selects the previous track or channel.
6. Next Track: Selects the next track or channel.
7. EQ: Selects an Equalizer (EQ) mode.
8. VOL-: Decreases the master volume.
9. VOL+: Increases the master volume.
10. REP: Repeats the current playing track.
11. Scan Channel (FM Mode): Press to scan for FM channels.
12. Number Keys (12-21): Used for selecting specific tracks on a USB flash drive.

TWS (True Wireless Stereo) Connection

PBX-804SM TWS Connection

TWS connection allows two speakers to be paired for stereo sound. This feature supports a maximum of two speakers.

1. Turn on both speakers. Press the MODE button on each speaker to switch to Bluetooth mode. The word "BLUE" on the LED screen will flash.
2. For the first-time connection, press and hold the Play/Pause (TWS) button on one unit for 3 seconds. The two speakers will connect to each other.
3. Connect to Phone: Open your phone's Bluetooth settings, search for and connect to the main device's Bluetooth name, which is "QFX PBX-804SM".
4. Select music from your phone and enjoy TWS playback in stereo with the paired speakers.
5. Exit TWS: To disconnect the TWS pairing, long-press the Play/Pause (TWS) button on either unit for 3 seconds.

Tripod Assembly Instructions (Related Product/Accessory)

PBX-808TWS Tripod Assembly

The following instructions describe the assembly of a tripod stand, which may be an accessory for related QFX products like the PBX-808TWS.

Components:

• Tripod: The base stand.
• Main Column: The vertical pole that attaches to the tripod.
• Sleeve: A cylindrical component that fits onto the main column.
• Lock Pin: A pin used to secure the height of the main column.
• Screws: Fasteners used to secure components.
• Nut Cases: Holders for nuts, which are inserted into slots.

Assembly Steps:

1. Take out the main column from the tripod and assemble it with the sleeve.
2. Place the nuts inside the nut cases. Insert one nut case into the sleeve slot and fasten it with a screw.
3. Insert another nut case into the tripod slot and fasten it with a screw as well.
4. Insert the lock pin into the hole of the main column to control and secure the desired height.