1. Introdución
This manual provides detailed instructions for the installation, operation, and maintenance of your Alpine SWS-12D4 12-inch Dual-Voice-Coil 4-Ohm Subwoofer. Please read this manual thoroughly before attempting installation or operation to ensure proper use and optimal performance. Retain this manual for future reference.

Figure 1: Alpine SWS-12D4 12-inch Subwoofer. This image shows a side view of the subwoofer, highlighting its cone and the robust magnet structure.
2. Información de seguridade
Observe sempre as seguintes precaucións de seguridade durante a instalación e o funcionamento:
- Instalación profesional recomendada: For optimal performance and safety, professional installation by an authorized Alpine dealer is highly recommended.
- Desconexión de alimentación: Before starting any installation, disconnect the negative terminal of your vehicle's battery to prevent electrical shorts and damage.
- Cableado: Ensure all wiring is correctly connected and insulated to prevent short circuits and potential fire hazards. Use appropriate gauge wire for power and speaker connections.
- Montaxe: Monte o subwoofer de forma segura para evitar que se converta nun proxectil en caso de parada brusca ou colisión.
- Ventilación: Asegúrese de que a ventilación sexa axeitada arredor do subwoofer e amplifier para evitar o sobrequecemento.
- Niveis de volume: A exposición prolongada a niveis de volume elevados pode causar danos auditivos. Axuste o volume a un nivel cómodo.
- Exposición ao líquido: Do not expose the subwoofer to moisture or liquids.
3. Configuración e instalación
3.1 Requisitos da carcasa
The Alpine SWS-12D4 subwoofer is designed to perform optimally in a sealed or ported enclosure. Refer to the subwoofer's technical specifications or Alpine's official website for recommended enclosure volumes and port dimensions. An improperly sized enclosure can negatively impact sound quality and subwoofer longevity.
3.2 Montaxe do subwoofer
The SWS-12D4 is designed for flush mounting. Ensure the mounting surface is rigid and capable of supporting the subwoofer's weight. Cut a circular opening in the enclosure baffle that matches the subwoofer's cutout diameter. Secure the subwoofer using appropriate screws, ensuring an airtight seal between the subwoofer frame and the enclosure.
3.3 Configuracións de cableado
The SWS-12D4 features a Dual-Voice-Coil (DVC) design with two 4-ohm voice coils. This allows for flexible wiring options to match your amprequisitos de impedancia do lificador. As configuracións comúns inclúen:
- Cableado en paralelo (2 ohmios): Conecta os terminais positivos de ambas bobinas de voz e os terminais negativos de ambas bobinas de voz. Despois, conecta o positivo combinado ao ampa saída positiva do lificador e a negativa combinada para o amplifier's negative output. This results in a 2-ohm load.
- Cableado en serie (8 ohmios): Conecta o terminal positivo dunha bobina móbil ao terminal negativo da outra bobina móbil. Despois, conecta o terminal positivo restante ao ampsaída positiva do transformador e o terminal negativo restante ao amplifier's negative output. This results in an 8-ohm load.
Verifica sempre o teu amplifier's stable impedance range before wiring. Incorrect impedance can damage your amplifier ou subwoofer.

Figura 2: Traseira view of the Alpine SWS-12D4 subwoofer. This image displays the dual voice coil terminals, essential for understanding wiring configurations.
4. Funcionamento do subwoofer
4.1 Acendido inicial e rodaxe
After installation, perform an initial power-up at a low volume. Gradually increase the volume to ensure all connections are secure and the subwoofer is functioning correctly. A break-in period of several hours at moderate listening levels is recommended to allow the subwoofer's suspension components to loosen and achieve optimal performance.
4.2 AmpConfiguración do lifier
Apropiado amplifier settings are crucial for sound quality and subwoofer longevity. Adjust the following on your ampmáis vivo:
- Ganancia: Establece o ampganancia do lificador para coincidir co volume de saídatage of your head unit. Do not use the gain control as a volume knob; it should be set to prevent clipping.
- Filtro paso baixo (LPF): Set the LPF to filter out high frequencies, typically between 60 Hz and 100 Hz, allowing only bass frequencies to reach the subwoofer.
- Filtro subsónico: If available, set the subsonic filter to protect the subwoofer from playing frequencies below its resonant frequency, which can cause damage.
- Boost de baixo: Use bass boost sparingly, if at all. Excessive bass boost can lead to clipping and damage the subwoofer.

Figura 3: Arriba view of the Alpine SWS-12D4 subwoofer. This image shows the cone and surround, which are critical for sound reproduction and require careful handling.
5. Mantemento
The Alpine SWS-12D4 subwoofer requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Limpeza: Limpe periodicamente o cono e o contorno do subwoofer cun pano suave e seco para eliminar o po e os residuos. Evite o uso de produtos químicos agresivos ou humidade excesiva.
- Inspección: Regularly inspect the speaker terminals and wiring for corrosion or loose connections. Ensure the mounting screws are tight.
- Protección ambiental: Protexa o subwoofer de temperaturas extremas, da luz solar directa e da humidade.
6 Solución de problemas
Se tes problemas co teu subwoofer, consulta os seguintes problemas e solucións comúns:
| Problema | Causa posible | Solución |
|---|---|---|
| Sen son |
|
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| Son distorsionado |
|
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| Saída de graves débil |
|
|
If problems persist, contact an authorized Alpine service center or your dealer for assistance.
7. Especificacións
| Característica | Descrición |
|---|---|
| Número de modelo | SWS-12D4 |
| Tipo de altofalante | Subwoofer |
| Diámetro do subwoofer | 12 polgadas |
| Voice Coil Configuration | Dual Voice Coil (DVC) |
| Impedancia nominal | 4 Ohms per voice coil (can be wired to 2 Ohms or 8 Ohms total) |
| Manexo de potencia máxima | 1500 vatios |
| Tipo de montaxe | Montar a lavar |
| Peso do elemento | 14 libras |
| Fabricante | alpino |
| GTIN / UPC | 793276011848 |
8. Garantía e soporte
8.1 Información da garantía
Alpine products are designed and manufactured to the highest quality standards. This product is covered by a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official Alpine websitio. Garde o recibo da compra como xustificante de compra para reclamacións de garantía.
8.2 Atención ao cliente
If you require technical assistance, have questions about your product, or need to arrange for service, please contact Alpine customer support. Contact information can typically be found on the Alpine websitio web ou na documentación que se inclúe co produto.
Alpine Official Websitio: www.alpine-usa.com





