1. Introdução
This manual provides detailed instructions for the installation, operation, and maintenance of the CUQI ZK-HT21 Bluetooth Amplifier Board. This 2.1 channel amplifier module is designed for DIY speaker projects, offering high-fidelity audio output with versatile input options and robust protection features.
2. Recursos do Produto
- Three Audio Input Methods: Supports AUX (3.5mm), USB (U-Disk), and Bluetooth 5.0 connections for broad compatibility with various audio devices. The Bluetooth connection range is approximately 15 meters (49 feet). Note: When using AUX mode, ensure the module's Bluetooth connection is disconnected.
- Triple-Channel Audio Experience: Features a built-in DA7498E chip, delivering 160W for left and right channels and 220W for the subwoofer, providing clear and powerful sound.
- Dissipação de calor eficaz: Incorporates a semi-open structure with a silent fan to efficiently reduce operating temperature and extend the amplifier board's lifespan.
- Multi-protection: Built-in safeguards against reverse polarity, short circuits, overheating, and overcurrent ensure safe operation.
- Ampla compatibilidade: Supports DC 15–36V power supplies (under-voltage protection triggers below 9V, also supports 12V). Compatible with 30–200W, 4–8Ω speakers.
3. Conteúdo da embalagem
Verifique se todos os itens listados abaixo estão incluídos em seu pacote:
Figura 3.1: Conteúdo da embalagem. This image displays the ZK-HT21 amplifier board, top and bottom cover plates, various screws and copper columns for assembly, five button caps, a power terminal, and a screwdriver.
- ZK-HT21 Bluetooth Amplifier Board x1
- Top Cover Plate x1
- Lower Cover Plate x1
- M2x18 Copper Column x4
- M2x5+4 Copper Column x4
- Parafusos M2x4mm x8
- Button Cap x5
- Power Terminal x1
- Chave de fenda x1
4. Produto acabadoview
Familiarize yourself with the components and controls of the ZK-HT21 ampplaca mais viva.
Figure 4.1: Component Layout. This diagram identifies the power input, speaker terminals, audio inputs (Bluetooth, AUX, USB), control knobs (Subwoofer Frequency, Bass Volume, Left/Right Channel Treble, Left/Right Channel Bass, Master Volume/Switch), and internal components like the fan and capacitors.
- Entrada de energia: 5.5x2.1DC Header and 2P Terminal for DC 15-36V power supply.
- Saídas de alto-falante: Terminals for Left, Right, and Subwoofer channels.
- Entradas de áudio: Bluetooth, AUX (3.5mm), USB (U-Disk).
- Subwoofer Freq (Frequency): Adjusts the cutoff frequency for the subwoofer.
- Volume do subwoofer: Controls the output level of the subwoofer.
- Left and Right Channel Treble: Adjusts high frequencies for stereo channels.
- Left and Right Channel Bass: Adjusts low frequencies for stereo channels.
- Master Volume/Switch: Controls overall volume. Press the dial button for short press (pause/play) or long press (switch mode: USB/Bluetooth/AUX).
- Interface de entrada USB: For connecting a U-Disk to play audio files.
- Antenna Base: For Bluetooth antenna (can be directly welded or use the antenna base).
5. Configuração e instalação
Follow these steps to assemble and connect your ampplaca mais viva.
Figura 5.1: Diagrama de montagem. This image illustrates the assembly process, showing the PCB board, copper columns, top and bottom cover plates, screws, and button caps.
- Assemble the Casing:
- Attach the M2x5+4 copper columns to the PCB board using the M2x4mm screws.
- Place the lower cover plate onto these copper columns.
- Attach the M2x18 copper columns to the PCB board.
- Place the top cover plate onto the M2x18 copper columns and secure with the remaining M2x4mm screws.
- Install the five button caps onto the control shafts.
- Conectar alto-falantes: Connect your 30-200W, 4-8Ω speakers to the designated Left, Right, and Subwoofer output terminals on the amplifier board. Ensure correct polarity (+/-).
- Conecte a energia: Connect a DC 15-36V power supply to the 5.5x2.1DC header or the 2P terminal. Ensure correct polarity.
- Conectar fonte de áudio: Escolha um dos seguintes métodos de entrada:
- Bluetooth: Power on the board. The Bluetooth indicator will flash. Procurar "ZK-HT21" on your device and pair.
- AUXILIAR: Connect your audio device (phone, PC, MP3, TV) to the 3.5mm AUX input. Ensure Bluetooth is disconnected.
- USB: Insert a U-Disk with audio files into the USB input interface.
6. Instruções de operação
Once connected, operate the ampAmplificador usando os seguintes controles:
Figure 6.1: Audio Input Methods. This image visually represents connecting audio sources via Bluetooth, AUX, or USB to the amplifier board for playback through speakers.
- Ligar/desligar: O amplifier powers on automatically when connected to a suitable power supply.
- Master Volume/Switch Knob:
- Rotate to adjust the overall output volume.
- Pressão curta: In Bluetooth mode, this acts as Play/Pause. In AUX mode, it mutes/unmutes the audio.
- Pressão longa: Switches between input modes (USB, Bluetooth, AUX).
- Subwoofer Freq Knob: Adjusts the low-pass filter frequency for the subwoofer output. Turn clockwise for higher cutoff, counter-clockwise for lower.
- Subwoofer Volume Knob: Adjusts the volume level of the subwoofer independently.
- Left and Right Channel Treble Knob: Adjusts the high-frequency response for the main stereo channels.
- Left and Right Channel Bass Knob: Adjusts the low-frequency response for the main stereo channels.
7. Manutenção
To ensure optimal performance and longevity of your ZK-HT21 amplifier board:
- Keep the board clean and free from dust. Use a soft, dry cloth for cleaning.
- Garanta ventilação adequada ao redor do amplifier, especially around the fan, to facilitate proper heat dissipation.
- Avoid exposing the board to moisture, extreme temperatures, or direct sunlight.
- Do not attempt to modify the circuit board, as this may void any potential warranty and could cause damage.
8. Solução De Problemas
Caso encontre algum problema, consulte os problemas e soluções comuns a seguir:
| Problema | Possível causa | Solução |
|---|---|---|
| Nenhuma saída de som. |
|
|
| Som distorcido. |
|
|
| Problemas de conexão Bluetooth. |
|
|
| Amplifier feels hot. |
|
|
Figure 8.1: Protection Features. This image highlights the various built-in protections of the amplifier board, including undervoltage, overheat, overcurrent, short-circuit, and reverse connection protection.
9. Especificações
| Parâmetro | Valor |
|---|---|
| Número do modelo | ZK-HT21 (BAB-2.1T) |
| Marca | CUQI |
| Canais | 2.1 (Left, Right, Subwoofer) |
| Potência de saída | 160W (Left) + 160W (Right) + 220W (Subwoofer) |
| Fonte de energia | DC 15-36V |
| Impedância do alto-falante | 4-8Ω |
| Potência do alto-falante | 30-200W |
| Versão Bluetooth | 5.0 |
| Alcance Bluetooth | Até 15 metros (49 pés) |
| Métodos de entrada de áudio | Bluetooth, AUX (3.5mm), USB (U-Disk) |
| Dimensões do produto (C x L x A) | 126 mm x 145 mm x 28 mm (4.96 x 5.71 x 1.1 polegadas) |
| Peso do item | Aproximadamente 13 onças |
Figura 9.1: Dimensões do produto. This image provides a visual representation of the amplifier board's physical dimensions.
10. Informações de segurança
Leia e siga estas diretrizes de segurança para evitar ferimentos ou danos ao produto:
- Use only the specified DC 15-36V power supply. Using an incorrect voltage or AC power can damage the board.
- Ensure correct polarity when connecting the power supply and speakers.
- Não opere o amplificador em molhado ou damp condições.
- Avoid touching the circuit board components while the unit is powered on.
- Mantenha fora do alcance de crianças.
- O amplifier board includes built-in protections against reverse polarity, short circuits, overheating, and overcurrent. However, always exercise caution during installation and operation.
11. Garantia e Suporte
For warranty information or technical support, please contact the seller or manufacturer directly. Retain your purchase receipt for any warranty claims.