1. Introduction
The Blackmore BJS-154BT is a portable amplified PA speaker designed for various audio applications, including DJ performances, live music, and public address. This unit integrates an MP3 music player and offers versatile connectivity options. It features dual XLR inputs, a 1/4 inch audio jack, and stereo RCA inputs. Audio playback is supported via USB, SD card, FM radio, or wireless streaming through Bluetooth connectivity. The system can be expanded by connecting additional speakers using its XLR output or the dedicated 8 Ohm speaker output.
2. Important Safety Instructions
Please read and follow all safety instructions before operating the BJS-154BT speaker to prevent electric shock, fire, or injury.
- Power Source: Connect the unit only to the specified power supply (12V DC or AC 110-240V 50/60Hz). Ensure the voltage matches your local power supply.
- Ventilation: Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
- Water and Moisture: Do not expose this apparatus to rain or moisture. Do not use near water or in wet locations.
- Heat: Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
- Grounding: Ensure the power cord is properly grounded. Do not defeat the safety purpose of the polarized or grounding-type plug.
- Power Cord Protection: Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
- Cleaning: Clean only with a dry cloth.
- Servicing: Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such as power-supply cord or plug is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been exposed to rain or moisture, does not operate normally, or has been dropped.
3. Package Contents
Verify that all items are present in the package:
- Blackmore BJS-154BT PA Speaker System
- Wireless Remote Control
- Power Cable
- User Manual (this document)
4. Product Overview
The BJS-154BT speaker features a robust design with a 15-inch subwoofer and a titanium dome tweeter, housed in a durable black enclosure. It includes integrated handles for portability and a floor-standing mounting type.
4.1 Front View
Figure 1: Front view of the BJS-154BT speaker, highlighting the protective grille and brand logo.
The front of the speaker features a sturdy metal grille protecting the 15-inch subwoofer and tweeter. The Blackmore logo is prominently displayed on the grille.
4.2 Side View
Figure 2: Side view of the BJS-154BT speaker, illustrating the integrated handle for easy transport.
The side of the speaker includes a recessed handle, designed for convenient and secure transportation of the unit.
4.3 Rear Panel and Controls
Figure 3: Overview of the BJS-154BT rear panel, displaying the digital audio player, input/output section, and power controls.
Figure 4: Detailed view of the BJS-154BT rear panel, showing specific controls and connection ports.
The rear panel houses all the essential controls and connectivity options:
- Digital Audio Player: Features an LCD screen, mode selection, playback controls (play/pause, stop, skip), USB port, and SD card slot.
- MIC 1/MIC 2 Inputs (XLR & 1/4 inch): For connecting microphones or other line-level audio sources. Each input has an independent LEVEL control.
- LINE IN (RCA & XLR): Stereo RCA inputs and an XLR input for connecting external audio devices like mixers or media players. Includes a LEVEL control.
- GUITAR Input (1/4 inch): Dedicated input for connecting a guitar, with its own LEVEL control.
- TREBLE/BASS Controls: Equalization controls to adjust the high and low frequencies of the audio output.
- MASTER VOLUME: Overall volume control for the speaker output.
- LINE OUT (XLR): For connecting to another powered speaker or audio system, allowing for system expansion.
- SPEAKER OUT (8 Ohm): Output for connecting an additional passive 8 Ohm speaker.
- CLIP POWER Indicator: Illuminates when the audio signal is clipping, indicating potential distortion.
- AC INLET: Power input for the AC power cable.
- POWER Switch: Turns the speaker ON or OFF.
5. Setup Guide
5.1 Speaker Placement
Place the BJS-154BT speaker on a stable, flat surface. The speaker is designed for floor-standing use. Ensure there is adequate space around the unit for proper ventilation to prevent overheating.
5.2 Connecting Power
- Ensure the POWER switch on the rear panel is in the OFF position.
- Connect the supplied power cable to the AC INLET on the rear panel of the speaker.
- Plug the other end of the power cable into a suitable electrical outlet (AC 110-240V 50/60Hz).
5.3 Connecting Audio Sources
The BJS-154BT offers multiple input options:
- Microphones: Connect microphones to the MIC 1 or MIC 2 XLR or 1/4 inch inputs. Adjust the corresponding LEVEL control.
- Line-Level Devices (Mixers, CD Players): Connect devices using RCA cables to the LINE IN RCA inputs or an XLR cable to the LINE IN XLR input. Adjust the LINE IN LEVEL control.
- Guitar: Connect your guitar to the GUITAR 1/4 inch input. Adjust the GUITAR LEVEL control.
5.4 Output Connections (System Expansion)
- Connecting to another Powered Speaker: Use an XLR cable to connect the LINE OUT (XLR) of the BJS-154BT to the input of another powered speaker.
- Connecting a Passive Speaker: Use a speaker cable to connect the SPEAKER OUT (8 Ohm) to an 8 Ohm passive speaker. Ensure the passive speaker's impedance matches the output.
6. Operating Instructions
6.1 Power On/Off and Volume Control
- After connecting all desired inputs and power, switch the POWER button to the ON position.
- Slowly turn up the MASTER VOLUME control to a desired listening level.
- Adjust individual input LEVEL controls (MIC 1, MIC 2, LINE IN, GUITAR) as needed.
- Use the TREBLE and BASS controls to fine-tune the audio's tonal balance.
6.2 Bluetooth Connectivity
- Press the MODE button on the digital audio player until "Bluetooth" is displayed on the LCD screen.
- On your Bluetooth-enabled device (e.g., smartphone), search for available Bluetooth devices.
- Select "BJS-154BT" from the list to pair.
- Once paired, you can stream audio wirelessly from your device to the speaker.
6.3 USB/SD Playback
- Insert a USB flash drive or an SD card containing MP3 audio files into the respective slot on the digital audio player.
- The player should automatically switch to USB or SD mode and begin playback. If not, press the MODE button to select the correct source.
- Use the playback controls (play/pause, skip forward/backward) on the digital audio player or the remote control to manage your music.
6.4 Using the FM Radio
- Press the MODE button on the digital audio player until "FM" is displayed.
- Use the playback controls to scan for radio stations. Typically, pressing the Play/Pause button once initiates an auto-scan, saving available stations.
- Use the skip forward/backward buttons to navigate through saved stations.
6.5 Remote Control Functions
The included wireless remote control allows for convenient operation of the digital audio player functions (mode selection, playback, volume for media player) from a distance. Refer to the remote control's markings for specific button functions.
7. Care and Maintenance
- Cleaning: Disconnect the power before cleaning. Use a soft, dry cloth to wipe the exterior surfaces. Do not use abrasive cleaners, waxes, or solvents.
- Storage: When not in use for extended periods, store the speaker in a cool, dry place, away from direct sunlight and extreme temperatures.
- Transportation: Use the integrated handles when moving the speaker. Ensure all cables are disconnected before transport.
8. Troubleshooting Guide
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected; Power switch off; Outlet malfunction | Ensure power cable is securely connected; Turn power switch ON; Test outlet with another device. |
| No sound output | Master volume too low; Input level too low; Incorrect input selected; Faulty audio cable | Increase MASTER VOLUME; Increase individual input LEVEL; Press MODE to select correct input; Check/replace audio cables. |
| Bluetooth not pairing | Speaker not in Bluetooth mode; Device too far; Device already paired to another speaker | Press MODE until "Bluetooth" is displayed; Move device closer to speaker; Disconnect from other devices and try again. |
| Distorted sound | Volume too high (clipping); Input signal too strong; Damaged speaker | Reduce MASTER VOLUME or input LEVEL (check CLIP indicator); Reduce output level from source device; If problem persists, contact support. |
| USB/SD not playing | Incorrect file format; USB/SD card not inserted correctly; Corrupt files | Ensure files are MP3 format; Reinsert USB/SD card; Try a different USB/SD card with known good files. |
9. Technical Specifications
| Feature | Specification |
|---|---|
| Model Name | BJS-154BT |
| Speaker Type | Powered PA Speaker, Subwoofer |
| Speaker Size | 15 Inches (Subwoofer) |
| Tweeter | Titanium Dome |
| Power Source | Corded Electric (AC 110-240V 50/60Hz) or 12V DC |
| Connectivity Technology | Bluetooth, RCA, USB, XLR |
| Wireless Communication | Bluetooth |
| Audio Output Mode | Stereo |
| Impedance | 8 Ohms |
| Special Features | FM Radio, USB/SD MP3 Player, Remote Control |
| Recommended Use | Music, DJ, PA |
| Compatible Devices | Smartphone, Microphone, Guitar, Mixer |
| Control Method | Remote Control |
| Mounting Type | Floor Standing |
| Color | Black |
| Product Dimensions | 48.3D x 73.7W x 40.6H centimeters |
| Product Weight | 14.5 Kilograms (32 Pounds) |
| Waterproof | No |
10. Warranty and Customer Support
For warranty information or technical assistance, please refer to the documentation provided at the time of purchase or contact Blackmore Pro Audio customer support directly. Keep your proof of purchase for any warranty claims.