1. Introduction
Thank you for choosing the Sunbuck AS-336BU Bluetooth 5.0 HiFi Stereo Power Amplifier. This versatile audio amplifier is designed for both home and car use, offering a range of features including Karaoke, FM radio, USB/SD card playback, and AUX input. With its 2000W peak power and 5-band EQ mixer, it provides a robust audio experience.
Important Safety Notes:
- The rated power of this amplifier is 400W. To prevent overheating and potential damage, ensure that the total power consumption of connected speakers does not exceed 400W.
- This amplifier requires connection to an audio source (e.g., TV, computer, CD player) via its audio input interfaces. If no sound is heard, verify the audio source switch setting. This unit does not feature an optical fiber interface.
2. Package Contents
Please check the package carefully to ensure all items are present:
- 1 x Sunbuck AS-336BU Audio Power Amplifier
- 1 x Remote Control
- 1 x User Manual
3. Specifications
| Feature | Specification |
|---|---|
| Model | AS-336BU |
| Dimensions (L×H×D) | 290 × 95 × 240 mm (11.4 × 3.7 × 9.4 inches) |
| Rated Voltage | AC 110V 50/60Hz, DC 12V |
| Plug Type | EU Plug (Note: Plug type may vary by region, e.g., US plug also available) |
| Rated Power | 400W |
| Peak Power | 2000W |
| Rated Frequency | 20Hz - 20KHz |
| Signal to Noise Ratio | ≥ 90dB |
| Standard Impedance | 4 to 16 ohm |
| Amplifier Type | AV Power Amplifier |
| Channel | 2.0 channel |
| Total Harmonic Distortion | ≤ 0.5% |
| Signal Input Sensitivity | 200mv (± 30mv) |
| Microphone Input Sensitivity | 9mv (± 2mv) |
| Recording Level Output | 1V |
| Auxiliary Level Output | 1V |
| Supported Media | USB Disk, SD Card |
| Color | Black |
4. Interface Overview
4.1 Front Panel
- POWER ON/OFF Switch: Main power switch for the unit.
- MIC1, MIC2, MIC3, MIC4 Inputs: 1/4-inch (6.35mm) jacks for connecting microphones.
- Microphone Adjustments:
- MIC Volume: Adjusts the overall volume of the microphones.
- MIC Treble: Adjusts the high frequencies of the microphone input.
- MIC Mid: Adjusts the mid-range frequencies of the microphone input.
- MIC Bass: Adjusts the low frequencies of the microphone input.
- ECHO: Controls the echo effect for microphones.
- DELAY: Controls the delay time for the microphone echo effect.
- INPUT Selector: Button to switch between audio sources (MP3/Bluetooth, AUX).
- VOLUME (Master): Large knob to adjust the overall output volume.
- USB/SD/MMC/FM/BT Player Section:
- Mp3/USB/FM/SD/MMC Card: Slot for USB drives and SD/MMC cards.
- LED Display: Shows current mode, track information, or FM frequency.
- Control Buttons: Play/Pause, Next/Previous Track, Mode selection (USB/SD/FM/Bluetooth).
- Main Audio Adjustments:
- TREBLE: Adjusts the high frequencies of the main audio output.
- BASS: Adjusts the low frequencies of the main audio output.
- BALANCE: Adjusts the left/right channel balance of the main audio output.
- Equalizer (EQ) Bands: Five-band graphic equalizer for Left and Right channels (100Hz, 330Hz, 1KHz, 3.3KHz, 10KHz) to fine-tune frequency response.
4.2 Rear Panel
- FM ANT: Connection point for the FM antenna.
- AC 110V Input: Power input for AC 110V (50/60Hz).
- Audio Input (L/R): RCA jacks for connecting external audio sources (e.g., DVD, CD, TV, PC).
- Audio Output (L/R): RCA jacks for connecting to other audio equipment or an active subwoofer.
- SPEAKER SYSTEM (Left/Right): Binding posts for connecting passive speakers (4-16 ohm impedance).
- POWER DC12V/5A INPUT: Power input for DC 12V (5A) for car or portable use.
5. Setup
Follow these steps to set up your Sunbuck AS-336BU amplifier:
- Power Connection:
- For home use, connect the AC power cord to the AC 110V input on the rear panel and then to a wall outlet.
- For car or portable use, connect a DC 12V/5A power supply (not included) to the DC 12V input on the rear panel.
- Speaker Connection:
- Connect your passive speakers to the "SPEAKER SYSTEM" binding posts on the rear panel. Ensure correct polarity (+ to + and - to -) for both Left and Right channels. The amplifier supports speakers with an impedance of 4 to 16 ohms.
- Caution: Ensure the total power of your speakers does not exceed the amplifier's rated power of 400W to prevent damage.
- Audio Input Connection:
- Connect your audio source (e.g., DVD player, CD player, TV, computer, smartphone via AUX cable) to the "Audio Input (L/R)" RCA jacks on the rear panel.
- For AUX input, use the 3.5mm jack on the front panel.
Figure 5.1: AUX Input location. - FM Antenna Connection:
- Connect the FM antenna (if included or purchased separately) to the "FM ANT" terminal on the rear panel for improved radio reception.
- Microphone Connection:
- Plug up to four microphones into the "MIC1" to "MIC4" input jacks on the front panel.
Figure 5.2: Microphone Input jacks. - USB/SD Card Insertion:
- Insert a USB flash drive or SD/MMC card into the respective slot on the front panel for media playback.
Figure 5.3: USB and SD Card Input.
6. Operating Instructions
6.1 Power On/Off
Flip the "POWER" switch on the front panel to the "ON" position to power on the amplifier. Flip it to "OFF" to power off.
6.2 Source Selection
Press the "INPUT" button on the front panel to cycle through available audio sources: MP3 (USB/SD/Bluetooth/FM) and AUX.
6.3 Bluetooth Operation
- Switch the input source to "MP3" mode. The LED display will indicate Bluetooth mode.
- Enable Bluetooth on your smartphone, tablet, laptop, or other Bluetooth-enabled device.
- Search for available Bluetooth devices and select "AS-336BU" (or similar name) to pair.
- Once paired, you can play audio from your device through the amplifier.
6.4 FM Radio Operation
In "MP3" mode, select FM radio using the "MODE" button on the front panel or remote control. Use the track skip buttons to scan for stations.
6.5 USB/SD Card Playback
Insert a USB disk or SD card with audio files (e.g., MP3 format) into the corresponding slot. The amplifier will automatically switch to USB/SD mode and begin playback. Use the control buttons for play/pause, next/previous track.
6.6 Microphone and Karaoke Functions
Connect your microphones to the MIC inputs. Use the dedicated "MIC Volume", "MIC Treble", "MIC Mid", "MIC Bass", "ECHO", and "DELAY" knobs to adjust the microphone sound and effects for karaoke.
6.7 Audio Adjustments
- Master Volume: Use the large "VOLUME" knob to control the overall sound level.
- Main Tone Controls: Adjust "TREBLE" and "BASS" knobs for the main audio output's high and low frequencies.
- Balance: Use the "BALANCE" knob to adjust the relative volume between the left and right channels.
- Equalizer: Use the five-band EQ sliders (100Hz, 330Hz, 1KHz, 3.3KHz, 10KHz) to fine-tune specific frequency ranges for both left and right channels to match your listening preference or room acoustics.
6.8 Remote Control
The included remote control allows for convenient adjustment of volume, input mode, track selection, and EQ settings from a distance.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the exterior of the amplifier. Do not use liquid cleaners or abrasive chemicals.
- Ventilation: Ensure the amplifier has adequate ventilation. Do not block the ventilation openings on the top or sides of the unit.
- Storage: When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
- Power Off: Always power off the amplifier before connecting or disconnecting any cables or performing maintenance.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound output |
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| Bluetooth not connecting |
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| USB/SD card not playing |
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| Overheating |
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9. User Tips
- Speaker Matching: The amplifier has a rated power of 400W (total for 2 channels) and supports 4-16 ohm speakers. When connecting speakers, ensure their impedance falls within this range and their power handling capacity is appropriate for the amplifier's output to prevent damage. For example, if using 8-ohm speakers, ensure their combined power handling is at least 400W.
- Extensive Controls: Users appreciate the wide range of control functions available. Experiment with the microphone's Treble, Mid, Bass, Echo, and Delay, as well as the main audio's Treble, Bass, Balance, and the 5-band equalizer to customize your sound experience.
10. Warranty and Support
For warranty information, technical support, or service inquiries, please refer to the contact details provided by your retailer or the manufacturer's official website. Keep your purchase receipt as proof of purchase.