Zopsc ZK-MT21
Zopsc ZK-MT21 100W Bluetooth AmpManual de usuario de la placa lifier
Model: ZK-MT21
1. Introducción
This user manual provides detailed instructions for the installation, operation, and maintenance of your Zopsc ZK-MT21 100W Bluetooth AmpPlaca de potencia. Lea este manual detenidamente antes de utilizar el producto para garantizar su correcto funcionamiento y seguridad.
2. Información de seguridad
- Asegúrese de que la fuente de alimentación voltage matches the specified DC12-24V.
- No exponga el dispositivo a la humedad ni a temperaturas extremas.
- Evite cortocircuitar los terminales de salida.
- Desconecte la alimentación antes de realizar cualquier conexión o ajuste.
- Este amplifier board includes built-in protection against reverse connection, overheating, overcurrent, and short circuits. However, always exercise caution.
3. Contenido del paquete
Verifique que todos los artículos estén presentes en el paquete:
- 1 x Amptablero más duradero
- 1 x Funda
- 1 x placa inferior
- 1 x Adapter (likely power adapter or DC jack adapter)
- 1 x Destornillador
- 5 x Knob Cover
- 8 x Tornillo
- 4 x Short Screw Column
- 4 x Long Screw Column

Image: All components included in the ZK-MT21 amplifier board package, neatly arranged.
4. Producto terminadoview
The Zopsc ZK-MT21 is a 2.1 channel Bluetooth 5.0 amplifier board designed for HiFi audio applications. It features adjustable controls for subwoofer frequency, subwoofer volume, left/right channel treble, left/right channel bass, and main volume. It supports both AUX and Bluetooth audio input.

Image: Labeled diagram of the ZK-MT21 amplifier board, showing power input, audio input, speaker outputs, and control knobs for subwoofer frequency, subwoofer volume, left/right channel treble, left/right channel bass, and main volume.
Identificación de componentes:
- Entrada de energía (DC12-24V): Connect the DC power adapter (5.5*2.1DC plug).
- Entrada de audio (AUX): 3.5mm audio jack for wired audio sources.
- Salida de subwoofer: Terminal for connecting a subwoofer speaker.
- Salida del canal izquierdo: Terminal para conectar el altavoz izquierdo.
- Salida del canal derecho: Terminal para conectar el altavoz derecho.
- Subwoofer Frequency Knob: Adjusts the cutoff frequency for the subwoofer (20-200Hz).
- Perilla de volumen del subwoofer: Controla el nivel de volumen del subwoofer.
- Treble (R&L Channel) Knob: Adjusts the high-frequency response for left and right channels.
- Bass (R&L Channel) Knob: Adjusts the low-frequency response for left and right channels.
- Perilla de volumen principal: Controla el volumen de salida general.
- Antena Bluetooth: For wireless audio connection.
5. Especificaciones
| Vol de trabajotage | DC12-24V |
| Versión de Bluetooth | 5.0 |
| Sensibilidad de entrada | 500mV |
| Entrada de audio | Bluetooth + Aux |
| Número de canales | 2.1 canales |
| Potencia de salida | 2 x 50W (Left and Right Channels) + 100W (Subwoofer) |
| Oradores aplicables | 15-100 W, 4-8 Ω |
| Peso del artículo | 6.3 onzas |
| Dimensiones del paquete | 5.12 x 4.45 x 2.09 pulgadas |
6. Instrucciones de configuración
6.1 Asamblea
El amplifier board comes with a protective shell (cover and bottom plate) that needs to be assembled. Use the provided screws, screw columns, and screwdriver to secure the board between the cover and bottom plate. Attach the knob covers to the control shafts.

Image: The ZK-MT21 amplifier board, both assembled with its protective casing and as a bare board, illustrating the assembly process.
6.2 Conexión de altavoces
- Identify the Subwoofer, Left Channel, and Right Channel output terminals on the amplifier board (refer to Product Overview).
- Connect your subwoofer speaker to the "Subwoofer" terminals. Ensure correct polarity (+ to + and - to -).
- Connect your left channel speaker to the "Left Channel" terminals. Ensure correct polarity.
- Connect your right channel speaker to the "Right Channel" terminals. Ensure correct polarity.
- Ensure all speaker wires are securely fastened and do not touch each other to prevent short circuits.
6.3 Conexión de la entrada de audio
The ZK-MT21 supports two audio input methods: Bluetooth and AUX (wired).
6.3.1 entrada auxiliar
- Connect a 3.5mm audio cable from your audio source (e.g., smartphone, MP3 player, computer) to the "Audio Input (AUX)" jack on the amptablero más duradero.
6.3.2 Entrada Bluetooth
- Ensure the Bluetooth antenna is properly connected (if detachable).
- El amplifier will automatically enter Bluetooth pairing mode when powered on and no AUX cable is connected.
- On your audio source device, search for Bluetooth devices and select "ZK-MT21" to pair.
- A confirmation sound may indicate successful pairing.
6.4 Conexión de alimentación
- Ensure all speaker and audio input connections are made before connecting power.
- Connect a DC12-24V power adapter (not included, typically 5.5*2.1DC plug) to the "Power Input" jack on the amptablero más duradero.
- Conecte el adaptador de corriente a una toma de pared adecuada.
7. Instrucciones de funcionamiento
7.1 Encendido y apagado
- El amplifier powers on automatically when connected to a power source.
- To power off, disconnect the power adapter from the amplifier or the wall outlet.
7.2 Ajuste de la configuración de audio
Utilice las perillas de control para ajustar la salida de audio:
- Volumen principal: Rotate the "Main Volume" knob to increase or decrease the overall sound level.
- Volumen del altavoz de subgraves: Rotate the "Subwoofer Volume" knob to adjust the bass output level.
- Frecuencia del subwoofer: Rotate the "Subwoofer Frequency" knob to set the crossover point for the subwoofer, typically between 20-200Hz. This determines which low frequencies are sent to the subwoofer.
- Treble (R&L Channel): Rotate the "Treble" knob to adjust the high-frequency response of the left and right speakers.
- Bass (R&L Channel): Rotate the "Bass" knob to adjust the low-frequency response of the left and right speakers.
8. Mantenimiento
- Mantener el ampMantenga la placa del elevador limpia y sin polvo. Utilice un paño suave y seco para limpiarla.
- No utilice limpiadores líquidos ni disolventes.
- Asegúrese de que haya una ventilación adecuada alrededor del amplificador para evitar el sobrecalentamiento.
- Evite colocar objetos pesados sobre el ampmás duradero.
9. Solución de problemas
| Problema | Posible causa | Solución |
|---|---|---|
| No hay salida de sonido |
|
|
| Sonido distorsionado |
|
|
| El Bluetooth no se conecta |
|
|
| Calentamiento excesivo |
|
|
El amplifier board includes built-in protection features for reverse connection, overheating, overcurrent, and short circuits. If the device stops functioning unexpectedly, disconnect power, check all connections, and allow it to cool down before attempting to restart.
10. Garantía y soporte
For warranty information or technical support, please refer to the retailer where you purchased the product or contact Zopsc customer service through their official channels. Keep your purchase receipt as proof of purchase.
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