1. Introduzzjoni
Thank you for choosing the DD Audio SW12A-D4 12-inch Dual 4-Ohm Subwoofer. This manual provides essential information for the proper installation, operation, and maintenance of your new subwoofer. Please read this manual thoroughly before attempting installation or use to ensure optimal performance and longevity of your product.
The SW12A-D4 is part of the REDLINE Hi-Def Tuned Subwoofer Series, designed to deliver powerful and clear bass reproduction for your audio system.
2. Informazzjoni dwar is-Sigurtà
Dejjem osserva l-prekawzjonijiet ta' sigurtà li ġejjin biex tevita korrimenti jew ħsara lit-tagħmir:
- Installazzjoni Professjonali Rakkomandata: Jekk m'intix ċert dwar xi aspett tal-installazzjoni, ikkonsulta professjonist kwalifikat tal-awdjo tal-karozzi.
- Itfi: Disconnect the vehicle's battery before performing any wiring or installation to prevent electrical shorts and damage.
- Wiring kif suppost: Ensure all wiring connections are secure and correctly polarized. Incorrect wiring can damage the subwoofer and ampaktar ħaj.
- Ventilazzjoni: Kun żgur li jkun hemm ventilazzjoni adegwata madwar is-subwoofer u amplifier biex jipprevjeni sħana żejda.
- Livelli tal-Volum: Espożizzjoni fit-tul għal livelli għoljin ta’ pressjoni tal-ħoss tista’ tikkawża ħsara permanenti fis-smigħ. Oqgħod attent meta taġġusta l-volum.
- Immuntar Sikur: Waħħal is-subwoofer sew biex tevita li jsir projettili f'każ ta' waqfien f'daqqa jew aċċident.
3. Kontenut tal-Pakkett
Malli tiftaħ il-pakkett, jekk jogħġbok ivverifika li l-oġġetti kollha huma preżenti u f'kundizzjoni tajba:
- DD Audio SW12A-D4 12-inch Subwoofer (1 unit)
- Manwal ta 'Istruzzjoni (dan id-dokument)
Note: Additional mounting hardware or wiring may be required and is typically sold separately.
4. Karatteristiċi
The DD Audio SW12A-D4 subwoofer incorporates several design elements for enhanced performance:
- High Temperature 2-inch Voice Coil
- Dual Voice Coil (DVC) 4 Ohm Configuration
- EROM Surround for durability and excursion
- Vented Stamped Steel Frame for structural integrity and cooling
- Vented Backplate for improved thermal management
- Push Terminals for secure and easy wire connection
5. Setup u Installazzjoni
Proper installation is crucial for the performance and longevity of your subwoofer. Follow these guidelines carefully.
5.1. Immuntar
The SW12A-D4 is designed for flush mounting. Ensure the mounting surface is rigid and free from obstructions. Use appropriate fasteners (not included) to secure the subwoofer.
- Dijametru tal-Immuntar: 11 pulzieri (27.94 ċm)
- Fond tal-Immuntar: 5.34 pulzieri (13.56 ċm)
- Frame Outer Diameter (with gasket): 12.4 pulzieri (31.5 ċm)
Before cutting, double-check all measurements to ensure a proper fit and clearance for the subwoofer's motor structure.

Immaġni: Ġenb view of the DD Audio SW12A-D4 subwoofer, highlighting the mounting flange and push terminals.
5.2. Wiring (Dual 4-Ohm Voice Coils)
The SW12A-D4 features dual 4-ohm voice coils, offering flexibility in wiring configurations to match your amplifier's impedance requirements. Always ensure your ampIl-lifer huwa stabbli fl-impedenza magħżula.
- Wajers Paralleli (Tagħbija ta' 2 Ohm): Connect the positive (+) terminals of both voice coils together, and the negative (-) terminals of both voice coils together. Then connect the combined positive to the ampl-output pożittiv tal-lifer u n-negattiv ikkombinat għall- ampl-output negattiv tal-lifer. Din il-konfigurazzjoni tirriżulta f'tagħbija ta' 2-ohm.
- Wajers tas-Serje (Tagħbija ta' 8 Ohm): Connect the positive (+) terminal of one voice coil to the negative (-) terminal of the other voice coil. Then connect the remaining positive (+) terminal to the amplifier's positive output and the remaining negative (-) terminal to the amplifier's negative output. This configuration results in an 8-ohm load.
Irreferi għal tiegħek amplifier's manual for recommended impedance loads. Incorrect impedance can lead to ampħsara lill-lifer jew prestazzjoni mnaqqsa.

Immaġni: Wara view of the DD Audio SW12A-D4 subwoofer, displaying the robust magnet structure and the dual push terminals for voice coil connections.
5.3. Enclosure Recommendations
The type and size of the enclosure significantly impact subwoofer performance. The following are general recommendations:
- Sealed Enclosure Volume: 0.8 - 1.5 cubic feet (22.6 - 42.5 liters)
- Ported Enclosure Volume: 1.0 - 1.75 cubic feet (28.3 - 49.6 liters)
These are starting points; fine-tuning may be necessary based on your specific vehicle and listening preferences. Consult with a car audio specialist for custom enclosure designs.

Immaġni: Quddiem view of the DD Audio SW12A-D4 subwoofer, showcasing the cone, EROM surround, and the DD Audio logo on the dust cap.
6. Istruzzjonijiet Operattivi
Once installed, follow these steps for initial operation and optimal performance:
- Qawwa Inizjali: After installation, turn on your head unit and amplifier at a low volume setting.
- Aġġustament tal-gwadann: Carefully adjust the gain setting on your amplifier. Do not set the gain too high, as this can lead to distortion and damage to the subwoofer. Use a multimeter or oscilloscope for precise gain setting if possible.
- Settings tal-crossover: Issettja l-filtru low-pass (LPF) fuq tiegħek amplifier or head unit to filter out frequencies above the subwoofer's optimal range (typically 60-100 Hz). This ensures the subwoofer only reproduces bass frequencies.
- Filtru Subsoniku: Jekk tiegħek amplifier has a subsonic filter, set it to protect the subwoofer from playing frequencies below its resonant frequency (Fs). For the SW12A-D4 (Fs: 33 Hz), a setting around 25-30 Hz is often appropriate.
- Perjodu ta' Break-in: Allow a break-in period of several hours of moderate listening before pushing the subwoofer to its limits. This allows the suspension components to loosen up and reach their optimal performance.

Immaġni: Quddiem angolat view of the DD Audio SW12A-D4 subwoofer, showing the depth of the cone and the robust surround.
7. Manutenzjoni
The DD Audio SW12A-D4 subwoofer requires minimal maintenance to ensure long-term performance:
- Tindif: Use a soft, dry cloth to gently wipe down the cone and surround. Avoid using harsh chemicals or excessive moisture.
- Spezzjoni: Periodically inspect the subwoofer for any signs of damage, such as tears in the surround or cone, or loose connections at the terminals.
- Protezzjoni Ambjentali: Protect the subwoofer from extreme temperatures, direct sunlight, and moisture. While not waterproof, reasonable care will extend its life.

Immaġni: Minn fuq għal isfel view of the DD Audio SW12A-D4 subwoofer, providing a clear look at the cone material and the EROM surround.
8 Issolvi l-problemi
Jekk tiltaqa' ma' problemi bis-subwoofer tiegħek, irreferi għall-problemi u s-soluzzjonijiet komuni li ġejjin:
- Ebda Ħsejjes:
- Check all wiring connections (power, ground, remote, signal, speaker wires) for looseness or incorrect polarity.
- Ivverifika l- ampIl-lifer huwa mixgħul (iċċekkja d-dawl indikatur tal-enerġija).
- Ensure the head unit is sending a signal to the ampaktar ħaj.
- Iċċekkja ampfjusis tal-lifer u fjusis tal-vetturi.
- Ħoss Mgħawġ:
- Naqqas ampgwadann lifier.
- Check for proper crossover settings (LPF too high or too low).
- Ensure the subwoofer is not over-powered or under-powered by the ampaktar ħaj.
- Inspect the subwoofer cone and surround for physical damage.
- Bass Dgħajjef:
- Iċċekkja l-polarità korretta tal-wajers.
- Iċċekkja amplifier gain and head unit subwoofer level settings.
- Ensure the enclosure volume is appropriate for the subwoofer.
- Check for air leaks in the enclosure.
- Subwoofer Overheating:
- Naqqas il-volum jew ampgwadann lifier.
- Ensure adequate ventilation for the subwoofer and ampaktar ħaj.
- Verify correct impedance matching between subwoofer and ampaktar ħaj.
If these steps do not resolve the issue, contact DD Audio customer support or your authorized dealer for further assistance.
9. Speċifikazzjonijiet
Detailed technical specifications for the DD Audio SW12A-D4 subwoofer:
| Speċifikazzjoni | Valur |
|---|---|
| Daqs tal-Kelliem | 12 pulzieri |
| Watts RMS (Recommended) | 100 - 300 Punent |
| Watts Peak | 600 W |
| Impedenza | DVC 4 Ohm |
| Dijametru tal-Kolja tal-Vuċi (VCD) | 2 pulzieri |
| Dijametru tal-pistun | 10 pulzieri |
| Resonant Frequency (Fs) | 33 Hz |
| Qms | 8.673 |
| Qes | 0.54 |
| Qts | 0.508 |
| Vas | 65.339 litri |
| Sensitivity (dBSPL) | 89 dB |
| Xmech | 25 mm |
| xmax | 8 mm |
| Frame OD | 12.22 pulzieri |
| Frame OD w/Gasket | 12.4 pulzieri |
| Dijametru tal-Immuntar | 11 pulzieri |
| Fond tal-Immuntar | 5.34 pulzieri |
| Dijametru tal-Mutur | 5.27 pulzieri |
| Motor Depth | 1.7 pulzieri |
| Piż tal-kalamita | 55 oz |
| Spostament tal-Woofer | 0.05 pied kubu |
| Sealed Enclosure (CuFt) | 0.8 - 1.5 |
| Ported Enclosure (CuFt) | 1.0 - 1.75 |
| Piż tal-oġġett | 16 liri |
| Tip ta' Garanzija | Limited |
10. Garanzija u Appoġġ
The DD Audio SW12A-D4 subwoofer comes with a Garanzija Limitata. Please refer to the warranty card included with your product or visit the official DD Audio websit għal termini u kundizzjonijiet dettaljati dwar il-kopertura tal-garanzija, it-tul ta' żmien, u l-proċeduri tat-talbiet.
For technical support, troubleshooting assistance beyond this manual, or warranty inquiries, please contact your authorized DD Audio dealer or visit the official DD Audio support portal:
When contacting support, please have your product model (SW12A-D4) and purchase information readily available.





