1. Product Overview
The SUNBUCK AV-298BT is a compact, high-fidelity audio power amplifier designed for home audio, background music systems, and small-scale entertainment setups. It features built-in Bluetooth connectivity, multiple input options, and a sleek front-panel design, delivering clear, dynamic sound with easy operation.
2. Key Features
- Bluetooth Connectivity: Seamlessly pairs with smartphones, tablets, and laptops for wireless music playback.
- Multiple Input Options: Supports RCA line-in, USB/SD card playback, and microphone input for versatile audio sources.
- Front-Panel Controls: Intuitive knobs for volume, bass, treble, and balance adjustment, plus input selection buttons.
- Digital Display: Shows input source, playback status, and volume level for clear operation feedback.
- Microphone Input: Includes a dedicated microphone jack with volume control, ideal for karaoke or voice announcements.
- Sleek Design: Compact, modern chassis with a premium finish, suitable for home and office environments.
- FM Radio: Built-in FM digital chip with external rod antenna support for automatic search and reception (87.5MHz-108MHz).
3. Specifications
| Item | Specification |
|---|---|
| Model | AV-298BT |
| Channels | 2 (2.0) |
| Maximum Power Per Channel | 90 W (Typical output: 2x50W/8Ω) |
| Bluetooth | Built-in Bluetooth module for wireless audio streaming |
| Input Interfaces | RCA (AUX), Bluetooth, USB/SD card, microphone input |
| Output Interfaces | Speaker terminals (2 channels, L/R), RCA line-out |
| Power Supply | AC 110V-240V 50Hz (or 110V/60Hz, depending on regional version) |
| Frequency Response | 20Hz-20KHz (+/-10dB) |
| Input Sensitivity | 150mV |
| Tone Control | 10dB at 10KHz (Treble), 8dB at 1kHz (Mid), 10dB at 100Hz (Bass) |
| Surround Effect Control | 0-10dB |
| Signal to Noise Ratio | ≥ 80dB |
| Loudness | +6dB at 100Hz / +6dB at 10KHz |
| Load Impedance | 4 to 8 ohms |
| Dimensions (L x W x H) | Approx. 35cm x 28cm x 9cm (14 x 11 x 3.54 inches) |
| Color Options | Golden/Black |
| Certification | CE |
Note: Specifications are subject to change without notice.
4. Setup and Connections
4.1. Power Connection
- Ensure the power switch on the amplifier is in the "OFF" position.
- Connect the power cord to the AC input on the rear panel of the amplifier.
- Plug the other end of the power cord into a grounded electrical outlet.
Important: To avoid inrush current damage, always ensure the power switch is OFF before connecting to power. Verify the correct voltage plug type (US Plug for 110V, EU Plug for 220V) for your region to prevent damage.
Image: Rear view of the amplifier, highlighting the power input and other connection ports.
4.2. Speaker Connection
- Use speaker wires to connect the left (L) and right (R) speaker terminals on the rear panel to your speakers.
- Observe polarity markings (red = positive, black = negative) to ensure correct phasing and avoid audio distortion.
- Secure all connections tightly.
Image: Detailed diagram of the amplifier's rear panel connections, showing speaker terminals and input/output ports.
4.3. Audio Source Connection
- Bluetooth Pairing:
- Power on the amplifier.
- Select the "Bluetooth" input mode using the front panel controls.
- Enable Bluetooth on your mobile device (smartphone, tablet, laptop).
- Search for "AV-298BT" in the device list and complete the pairing process.
Image: Visual guide for connecting a mobile phone to the amplifier via Bluetooth.
- RCA Input: Use RCA cables to connect external audio devices (e.g., TV, CD player, turntable) to the AUX input terminals on the rear panel.
- USB/SD Card: Insert a USB flash drive or SD card into the corresponding slots on the front panel for direct audio file playback.
Image: Front panel detail showing USB and SD card input slots.
- FM Radio: Connect an external rod antenna to the FM ANT port on the rear panel for improved radio reception.
Image: Diagram illustrating the FM antenna connection.
4.4. Microphone Connection
- Plug one or two microphones into the front-panel microphone jacks (MIC1, MIC2).
- Adjust the microphone volume knob to optimize vocal performance and avoid feedback.
Image: Amplifier front panel with two microphones connected.
5. Operation Instructions
5.1. Front Panel Controls
Image: Front and rear panel indicator diagram with numbered controls.
| No. | Control/Indicator | Function |
|---|---|---|
| 1 | Power ON / OFF | Turns the amplifier on or off. |
| 2 | Microphone Volume -/+ | Adjusts the input level of connected microphones. |
| 3 | Mic 1 / 2 | Microphone input jacks. |
| 4 | Echo | Adjusts the echo effect for microphones. |
| 5 | BASS | Adjusts low-frequency response. |
| 6 | TREBLE | Adjusts high-frequency response. |
| 7 | Loud -/+ | Adjusts loudness. |
| 8 | Master Vol | Controls the overall audio output level. |
| 9 | Exchange Input | Cycles through available input sources (Bluetooth, AUX, USB/SD, FM). |
| 10 | SD Card | SD card input slot. |
| 11 | Display | Shows current input source, volume level, and playback status. |
| 12 | USB Disk | USB input slot. |
| 13 | Prev / Play.Pause / Next / Mode | Controls playback and input mode selection. |
| 14 | CD Input / DVD Input | RCA input for CD/DVD players. |
| 15 | Output | RCA line-out. |
| 16 | Main Channel 1 / 2 | Speaker terminals for main left/right channels. |
| 17 | Surround / Mid / Surround | Additional speaker terminals (functionality may vary by model). |
| 18 | Power supply | AC power input. |
5.2. Remote Control Functions
Image: Remote control layout with button descriptions.
- Player standby and power button
- Channel next
- Channel PREV
- Next
- PREV
- Vol- (Volume Down)
- Vol+ (Volume Up)
- Function button (Numeric keypad for direct track selection)
- Pause/Play
- EQ effect (Equalizer settings)
- Mode (Input mode selection)
- Recycle (Repeat function)
5.3. Basic Operation Steps
- Connect all necessary cables (power, speakers, audio sources, microphone) and ensure they are secure.
- Turn on the power switch. The amplifier will initialize, and the digital display will activate.
- Select your desired input source using the input selector button on the front panel or the "Mode" button on the remote control.
- Gradually increase the master volume to a comfortable listening level.
- Adjust the BASS, TREBLE, and BALANCE controls to optimize the audio output to your preference.
- When using a microphone, adjust the microphone volume knob and Echo control to avoid feedback and ensure clear vocal reproduction.
- When finished, lower the master volume to the minimum, turn off the power switch, and disconnect the power cord.
6. Safety & Maintenance
- Operating Environment: Use the amplifier in a well-ventilated area away from direct sunlight, moisture, heat sources, and excessive dust.
- Overload Protection: Avoid operating the amplifier at maximum volume for extended periods to prevent overheating and component damage.
- Cleaning: Use a dry, soft cloth to wipe the exterior. Do not use liquid cleaners or aerosols directly on the unit.
- Cable Management: Ensure all cables are properly routed and secured to prevent tripping hazards and accidental disconnections.
- Emergency Procedures: If you notice unusual smells, smoke, or noises, immediately turn off the power and disconnect the cord. Do not attempt to repair the unit yourself; contact authorized service personnel.
Image: Internal components of the amplifier, for reference.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output | Power not connected, incorrect input source, loose speaker connections | Check power cord, select correct input, re-secure speaker cables |
| Bluetooth connection failure | Device out of range, Bluetooth disabled, signal interference | Move device closer, enable Bluetooth, reduce interference from other devices |
| Distorted audio | Overloaded input, incorrect EQ settings | Reduce input level, reset EQ to default settings |
| Microphone feedback | Volume too high, microphone too close to speakers | Lower microphone volume, reposition microphone away from speakers |
8. User Tips
- Voltage Compatibility: Ensure you select the correct plug type (US Plug for 110V, EU Plug for 220V) for your region to prevent damage to the amplifier.
- Sound Quality: Users have reported good sound and quality build, suggesting proper setup and source material will yield excellent audio performance.
9. Packaging Contents
- SUNBUCK AV-298BT Power Amplifier ×1
- Remote control ×1
- Power cord ×1
- RCA audio cable ×1
- User manual ×1
- Warranty card ×1
- 32GB USB Card (gift) ×1
10. Warranty and Support
This product is covered by a manufacturer's warranty against defects in materials and workmanship for a period of 12 months from the date of purchase. For warranty claims, please contact the official customer service center with your purchase receipt and product details.
A digital version of this user manual is available for download. You can access the PDF document for further details and reference: View User Manual (PDF).