1. Introduzione
This manual provides detailed instructions for the installation, operation, and maintenance of your Seventour ST-800 10-inch 800W Slim Under Seat Powered Car Subwoofer. This unit is designed to enhance your vehicle's audio system by providing powerful bass in a compact form factor. Please read this manual thoroughly before installation and use to ensure proper function and safety.
2. Informazioni sulla sicurezza
- Prima di iniziare qualsiasi intervento elettrico, scollegare sempre il terminale negativo della batteria del veicolo per evitare cortocircuiti e scosse elettriche.
- Ensure all wiring is properly routed and secured to prevent damage from sharp edges, moving parts, or excessive heat.
- Use appropriate gauge wiring as specified in the installation section to prevent overheating and potential fire hazards.
- Non installare il subwoofer in una posizione che ostruisca la vista del conducente view or interferes with the safe operation of the vehicle.
- Evitare di esporre l'unità a umidità o temperature estreme.
- In caso di dubbi su una qualsiasi fase del processo di installazione, rivolgersi a un installatore qualificato di sistemi audio per auto.
3. Contenuto della confezione
Verifica che tutti gli articoli elencati di seguito siano inclusi nel tuo pacchetto:
- 10-inch subwoofer main unit
- High to Low Level Converter
- Cavo di alimentazione
- RCA input/output cables
- Volume controller (wired bass remote)
- cavo GND
- Connection Terminals and Mount Screws
- Velcro di montaggio

Figure 3.1: Included components with the Seventour ST-800 subwoofer.
4 Caratteristiche
- Integrato Amplificatore: Incorporato amplifier for simplified installation and optimized performance.
- Design sottile: Compact dimensions (13.5"L x 10.2"W x 3.1"H) for flexible mounting options, including under seats.
- Uscita ad alta potenza: Peak power of 800 Watts and RMS power handling of 220 Watts for robust bass.
- Dynamic LED Ambient Light: Features a blue LED light ring that illuminates when the subwoofer is active.
- Ingressi versatili: Supports both low-level RCA inputs and high-level inputs for compatibility with various car stereo systems.
- Telecomando cablato: Includes a wired bass volume remote control for convenient adjustment of bass levels.
- Circuito di protezione: Equipped with thermal, short circuit, and overload protection to ensure durability and safe operation.
- Controlli regolabili: Gain, bass boost (0-12dB @ 45Hz), and low pass filter (50Hz-150Hz) for sound customization.

Figure 4.1: The ST-800 subwoofer is rated for 800 Watts peak power handling.

Figure 4.2: The subwoofer features a blue LED ambient light that activates with the unit.

Figure 4.3: The rear panel shows connections for both high-level and low-level inputs.

Figure 4.4: The slim design allows for installation in confined spaces such as under seats or in the trunk.
5. Installazione
5.1 Posizione di montaggio
Choose a secure and discreet location for the subwoofer. Common locations include under a seat or in the trunk. Ensure the chosen location allows for adequate ventilation and does not interfere with vehicle operation or passenger safety. Use the provided mounting screws and Velcro to secure the unit firmly.
5.2 Collegamenti di cablaggio
Seguire attentamente lo schema elettrico. Un cablaggio errato può danneggiare l'unità o l'impianto elettrico del veicolo.
- Connessione di alimentazione (+12V): Connect the power cable (red) to the positive terminal of your vehicle's battery. Install the included fuse holder as close to the battery as possible.
- Collegamento a terra (GND): Connect the ground cable (black) to a clean, unpainted metal surface on the vehicle's chassis. Ensure a good electrical connection.
- Accensione remota (REM): Connect the remote turn-on cable (blue) to the remote output of your car stereo. This will turn the subwoofer on and off with your stereo. If your stereo does not have a remote output, you can connect it to an accessory wire that turns on with the ignition.
- Ingresso audio:
- Ingresso a basso livello (RCA): If your car stereo has RCA pre-outs, connect them to the "LOW LEVEL" RCA inputs on the subwoofer using the provided RCA cables.
- Input di alto livello: If your car stereo does not have RCA pre-outs, use the provided High to Low Level Converter. Connect your stereo's speaker outputs to the converter, then connect the converter's output to the "HIGH LEVEL" input on the subwoofer.
- Controllo remoto dei bassi: Connect the wired volume controller to the "REMOTE CONTROL" port on the subwoofer. Mount the controller in an accessible location for easy adjustment.

Figure 5.1: Wiring diagram for the Seventour ST-800 subwoofer.
6. Funzionamento
6.1 Configurazione iniziale e regolazioni
After installation, reconnect the vehicle's battery. The subwoofer's blue LED ambient light will illuminate when the unit powers on. Use the controls on the subwoofer's side panel and the wired remote to fine-tune the sound.

Figure 6.1: Subwoofer control panel with adjustment knobs.
- GUADAGNO: Adjusts the input sensitivity. Start with the gain at minimum and slowly increase it until the desired volume is achieved without distortion.
- FILTRO PASSA BASSO (LPF): Controls the upper frequency limit of the subwoofer. Adjust between 50Hz and 150Hz. A common setting is around 80-100Hz, but this can be adjusted to blend with your main speakers.
- AUMENTO DEI BASSI: Provides an adjustable bass enhancement at 45Hz, from 0 to 12dB. Use sparingly to avoid distortion.
- FASE: Switches the subwoofer's output phase between 0° and 180°. Adjust this to match the phase of your main speakers for optimal bass response. Listen to music and switch between 0° and 180° to find the setting that produces the strongest and most coherent bass.
- TELECOMANDO: The wired remote allows for convenient adjustment of the subwoofer's output level from the driver's seat.
6.2 indicatore LED
The subwoofer features a dual-color LED indicator:
- LED verde: Indicates normal operation (Power ON).
- LED rosso: Indicates a protection mode (e.g., thermal overload, short circuit). If the red LED illuminates, turn off your audio system and investigate the cause.
7. Risoluzione Dei Problemi
| Problema | Possibile causa | Soluzione |
|---|---|---|
| Nessuna alimentazione / Nessun LED | Fusibile bruciato, collegamento di alimentazione/terra scadente, nessun segnale remoto. | Check fuse, verify power and ground connections, ensure remote wire is connected and receiving +12V when stereo is on. |
| Nessun suono | Low gain setting, incorrect audio input connection, damaged RCA cables, stereo output issues. | Increase gain, check RCA or high-level input connections, test cables, ensure stereo is outputting audio. |
| Suono distorto | Gain set too high, bass boost too high, incorrect LPF setting, poor quality audio source. | Reduce gain, lower bass boost, adjust LPF, use a higher quality audio source. |
| Subwoofer Overheats (Red LED) | Ventilazione insufficiente, volume elevato prolungato, mancata corrispondenza dell'impedenza. | Ensure adequate airflow around the unit, reduce volume, check wiring for short circuits. Allow unit to cool down. |
| Bassi deboli | Phase mismatch, low gain, incorrect LPF, poor mounting. | Adjust phase switch, increase gain, adjust LPF, ensure subwoofer is securely mounted. |
8. Specifiche
| Caratteristica | Specificazione |
|---|---|
| Nome del modello | ST-800 |
| Tipo di altoparlante | Subwoofer |
| Tipo di montaggio | Under Seat Mount |
| Materiale | Alluminio |
| Dimensioni dell'altoparlante | 10 pollici |
| Diametro subwoofer | 10.2 pollici |
| Potenza massima in uscita dell'altoparlante | 800 Watt (picco) |
| Gestione della potenza RMS | 220 Watt |
| Impedenza | 4 Ohm |
| Risposta in frequenza | 20Hz - 500Hz |
| Filtro passa basso | 50Hz - 150Hz |
| Aumento dei bassi | 0 - 12 dB a 45 Hz |
| Rapporto segnale/rumore | >90 dB |
| Distorsione armonica totale (THD) | < 0.4% |
| Rated Fuse | 25A |
| Sensibilità di ingresso di basso livello | 300mV |
| Sensibilità di ingresso di alto livello | 0.9V |
| Dimensioni del prodotto (L x P x A) | 13.5" x 10.2" x 3.1" |
| Peso dell'articolo | 10.65 libbre (4.84 kg) |
| Tecnologia di connettività | Wired (Auxiliary, RCA) |
| Tipo di servizio del veicolo | Bus, Car, Truck |
9. Manutenzione
- Pulizia: Utilizzare un panno morbido e asciutto per pulire l'esterno del subwoofer. Non utilizzare prodotti chimici aggressivi o detergenti abrasivi.
- Verifiche della connessione: Controllare periodicamente tutti i collegamenti elettrici per assicurarsi che siano saldi e privi di corrosione.
- Ventilazione: Ensure that the subwoofer's ventilation areas are not blocked by debris or other objects to prevent overheating.
10. Garanzia e supporto
Seventour provides comprehensive customer service support for this product:
- Politica di reso di 30 giorni: Puoi restituire il prodotto entro 30 giorni dall'acquisto per qualsiasi motivo.
- Sostituzione in 1 anno: For any product quality issues within 1 year of purchase, Seventour promises to replace the product with a new one.
- Riparazione in 2 anni: The product is eligible for repair within 2 years of purchase.
For professional after-sales support, please contact Seventour directly. We aim to reply to every customer's email within 12 hours.

Figure 10.1: Seventour Service Support overview.





