1. Product Overview
The WOOPKER AK35 is a compact 2.0 channel stereo audio amplifier designed for home use. It features Bluetooth 5.0 connectivity, USB and SD card inputs, AUX input, and controls for bass, treble, and master volume. This amplifier delivers clear and powerful sound for various audio setups.
Image 1.1: Front view of the AK35 Stereo Audio Amplifier.
2. Package Contents
Verify that all items are present in the package:
- 1x AK35 Audio Amplifier
- 1x Power Cable
- 1x User Manual (this document)
- 1x Remote Control
Image 2.1: Contents of the AK35 amplifier package.
3. Setup Instructions
3.1 Front Panel Controls
Familiarize yourself with the front panel controls and indicators:
Image 3.1: Front Panel Layout of the AK35 Amplifier.
- Power Switch: Turns the amplifier ON/OFF.
- Bass Knob: Adjusts the low-frequency audio output.
- Treble Knob: Adjusts the high-frequency audio output.
- Audio Input: Selects the audio source (AUX, USB, SD, Bluetooth, FM).
- LED Display: Shows current mode, track information, or frequency.
- Master Volume: Controls the overall output volume.
- Function Buttons: Includes VOL-, SCAN, VOL+, MODE for navigation and control.
- TF/USB Port: For connecting USB flash drives or SD cards (via adapter).
3.2 Rear Panel Connections
Understand the rear panel for proper connectivity:
Image 3.2: Rear Panel Layout of the AK35 Amplifier.
- Audio Input Jack (RCA): Connect external audio sources via RCA cables.
- Speaker Output Jack (L/R): Connect passive speakers.
- DC 12V/5A Power Input: For DC power supply.
- AC 110-240V Power Input: For AC power supply.
- FM Radio Antenna: Connect the included FM antenna for radio reception.
3.3 Speaker Connection
Follow these steps to connect your speakers:
Image 3.3: Speaker Connection Diagram.
- Before connecting speakers, distinguish the positive (+) and negative (-) terminals. The positive terminal is usually red, and the negative terminal is black.
- Press the clasp on the back of the AK35 amplifier and insert bare speaker wires into the speaker clasp corresponding to the positive and negative terminals.
- Ensure proper polarity (+ to + and - to -) for both left and right channels.
- Avoid plugging and unplugging USB drives, SD cards, RCA audio cables, or speaker cables while the amplifier is turned on.
3.4 Power Connection
Connect the power cable to the AC power input on the rear panel and then to a suitable power outlet.
Video 3.4: Demonstrates connecting speaker wires and powering on the AK35 amplifier.
4. Operating Instructions
4.1 Power On/Off
Flip the Power Switch on the front panel to turn the amplifier ON or OFF.
4.2 Input Mode Selection
Press the 'MODE' button on the front panel or remote control to cycle through available input sources: Bluetooth (BT), AUX, USB, SD, and FM Radio.
4.3 Bluetooth Pairing
To connect a Bluetooth device:
- Switch the amplifier to Bluetooth mode (the LED display will show "BLUE").
- Enable Bluetooth on your mobile device or computer.
- Search for "AK35" in the list of available devices and select it to pair.
- Once paired, the amplifier will confirm the connection, and you can stream audio wirelessly.
Image 4.3: Bluetooth 5.0 connectivity for wireless music streaming.
Video 4.3: Demonstrates Bluetooth pairing and music playback with the AK35 amplifier.
4.4 USB/SD Card Playback
Insert a USB flash drive or an SD card (with an adapter) into the TF/USB port. The amplifier will automatically switch to USB/SD mode and begin playing audio files. Use the Function Buttons (VOL-, SCAN, VOL+) to control playback.
4.5 AUX Input Usage
Connect an external audio source (e.g., CD player, DVD player, computer) to the RCA Audio Input Jacks on the rear panel using an RCA cable. Switch the amplifier to AUX mode to play audio from the connected device.
4.6 FM Radio
Ensure the FM antenna is connected to the rear panel. Switch the amplifier to FM mode. Use the 'SCAN' button to auto-scan and save available radio stations. Use VOL- and VOL+ to navigate through saved stations.
4.7 Volume, Bass, and Treble Adjustment
Adjust the Master Volume knob for overall sound level. Use the Bass and Treble knobs to fine-tune the low and high frequencies according to your preference.
Image 4.7: Remote control for easy adjustment of amplifier settings.
5. Maintenance
5.1 Cleaning
Wipe the amplifier's exterior with a soft, dry cloth. Do not use liquid cleaners or solvents, as they may damage the finish or internal components.
5.2 Storage
When not in use for extended periods, store the amplifier in a cool, dry place away from direct sunlight and extreme temperatures.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power | Power cable not connected; Power switch off; Power outlet faulty. | Ensure power cable is securely connected. Turn the power switch ON. Test the power outlet with another device. |
| No sound output | Incorrect input mode; Speaker wires loose; Volume too low; Audio source issue. | Select the correct input mode. Check speaker wire connections. Increase master volume. Verify audio source is playing and connected correctly. |
| Bluetooth not connecting | Amplifier not in BT mode; Device not in pairing mode; Interference. | Switch amplifier to BT mode. Ensure your device's Bluetooth is on and searching. Move closer to the amplifier. |
| USB/SD card not playing | Incorrect file format; Card/drive not inserted correctly; Corrupted files. | Ensure audio files are in supported formats (e.g., MP3). Reinsert the USB drive/SD card. Try a different USB drive/SD card. |
7. Specifications
- Model: AK35
- Peak Power Output: 100W + 100W
- Rated Power (RMS): 30W x 2
- Channels: 2.0
- Bluetooth Version: 5.0
- Inputs: AUX (RCA), USB, SD Card, Bluetooth, FM Radio
- Controls: Bass, Treble, Master Volume
- Power Input: DC 12V/5A, AC 110-240V
- Item Weight: 1.28 pounds (approx. 580g)
- Package Dimensions: 8.03 x 6.93 x 2.13 inches (approx. 20.4 x 17.6 x 5.4 cm)
8. Warranty and Support
WOOPKER products are designed for reliability and performance. For warranty information or technical support, please refer to the contact details provided with your purchase or visit the official WOOPKER website. Keep your purchase receipt for warranty claims.
