Introducció
This manual provides detailed instructions for the installation, operation, and maintenance of your DD Audio 312E-D2 12-inch Subwoofer. To ensure optimal performance and longevity of your product, please read this manual thoroughly before installation and use. Retain this manual for future reference.

Figura 1: Front-top view of the DD Audio 312E-D2 12-inch Subwoofer, showcasing el seu con i els seus voltants.
Característiques del producte
The DD Audio 312E-D2 subwoofer incorporates advanced design elements for enhanced audio performance and durability:
- Free Flow Cooling System: Designed to dissipate heat efficiently, ensuring stable performance during extended use.
- High-Temperature Voice Coil: Constructed to withstand high power levels without degradation.
- Dual Layer Spider System with Integrated Tinsel Leads: Provides robust cone control and reliable electrical connection.
- Extended Pole Piece: Optimizes magnetic field linearity for reduced distortion.
- DD Logo Basket: Aesthetically designed and structurally rigid.
- Double Stitched EROM Surrounds: Enhances durability and excursion capabilities.
- Fiberglass Loaded Non-Pressed Cones: Offers a balance of rigidity and light weight for accurate sound reproduction.
- Embossed DDesign Magnet Boot: Protects the magnet assembly and adds to the product's finish.
Informació de seguretat
Observe the following safety guidelines to prevent injury and damage to the subwoofer or vehicle:
- Desconnecteu sempre el terminal negatiu de la bateria del vehicle abans de començar qualsevol treball elèctric.
- Ensure proper wiring polarity to prevent damage to the subwoofer and ampmés viu.
- Feu servir un cablejat de calibre adequat per a les connexions d'alimentació i altaveus per gestionar els requisits d'alimentació del subwoofer.
- Mount the subwoofer securely to prevent it from becoming a projectile in the event of a sudden stop or accident.
- Avoid prolonged exposure to extremely high volume levels, which can cause hearing damage.
- Consulteu un instal·lador professional si teniu dubtes sobre algun aspecte del procés d'instal·lació.
Contingut del paquet
Verifiqueu que hi hagi tots els elements en desempaquetar:
- One (1) DD Audio 312E-D2 12-inch Subwoofer
- Manual d'instruccions (aquest document)
Configuració i instal·lació
Proper installation is critical for the performance and safety of your subwoofer. If you are not experienced with car audio installation, it is recommended to seek professional assistance.
1. Enclosure Selection and Construction
The 312E-D2 subwoofer is designed for optimal performance in a ported enclosure. The recommended volume for a ported enclosure is between 1.75 and 2.75 cubic feet. Consult a car audio specialist or use specialized software for precise enclosure design, including port dimensions, to match your specific vehicle and listening preferences.
2. Muntatge del subwoofer
Ensure the mounting surface is rigid and free from obstructions. The subwoofer requires a mounting diameter of 13.89 inches and a mounting depth of 7.32 inches. Use appropriate fasteners to secure the subwoofer firmly into the enclosure.

Figura 2: lateral view of the DD Audio 312E-D2 subwoofer, highlighting the speaker terminals for wiring connections.
3. Connexions de cablejat
The 312E-D2 features a dual 2-Ohm voice coil configuration. This allows for various wiring options to achieve different final impedances at the amplifier. Always verify the amplifier's stable impedance range before connecting.
- Càrrega d'1 ohm (cablejat en paral·lel): Connect both voice coils in parallel. This configuration results in a 1-Ohm load, suitable for amplifiers stable at 1-Ohm.
- Càrrega de 4 ohms (cablejat en sèrie): Connect both voice coils in series. This configuration results in a 4-Ohm load, suitable for amplifiers stable at 4-Ohm.
Consulteu el vostre amplifier's manual for specific wiring diagrams and impedance compatibility. Ensure all connections are secure and properly insulated to prevent short circuits.

Figura 3: A baix view of the DD Audio 312E-D2 subwoofer, displaying the magnet structure and model identification.
Instruccions de funcionament
Un cop instal·lat, seguiu aquestes pautes per obtenir un rendiment i una longevitat òptims:
- Període d'entrada: Allow a break-in period of approximately 20-30 hours of normal listening before operating the subwoofer at peak power levels. This allows the suspension components to loosen and reach their optimal compliance.
- Maneig de potència: The 312E-D2 has a continuous RMS power rating of 500 Watts and a peak power rating of 1500 Watts. Ensure your amplifier's output matches these specifications to prevent damage.
- Configuració de guany: Estableix el teu ampguany del lificador correctament per coincidir amb el volum de sortidatage of your head unit. Incorrect gain settings can lead to clipping and damage to the subwoofer.
- Configuració de crossover: Feu servir un filtre de pas baix (LPF) al vostre amplifier or head unit to send only low-frequency signals to the subwoofer. A typical LPF setting for subwoofers is between 60Hz and 100Hz.
Manteniment
The DD Audio 312E-D2 subwoofer requires minimal maintenance:
- Neteja: Use a soft, dry cloth to wipe down the cone and surround. Avoid using harsh chemicals or excessive moisture.
- Inspecció: Comproveu periòdicament totes les connexions del cablejat per comprovar si estan ben ajustades i si hi ha signes de corrosió. Inspeccioneu el con i el voltant del subwoofer per detectar esquinçaments o danys.
- Medi ambient: Assegureu-vos que el subwoofer estigui instal·lat en un entorn lliure d'humitat excessiva, llum solar directa i temperatures extremes.
Resolució de problemes
Si teniu problemes amb el subwoofer, consulteu els problemes i solucions més comuns següents:
- Sense so:
- Check all wiring connections (power, ground, remote, RCA, speaker).
- Verifiqueu el amplifier is powered on and not in protection mode.
- Assegureu-vos que la unitat principal envia un senyal d'àudio.
- Check for blown fuses in the power line or ampmés viu.
- So distorsionat:
- Reduir el amplifier gain or head unit volume to prevent clipping.
- Comproveu la configuració correcta del crossover.
- Inspeccioneu els cables de l'altaveu per si hi ha curtcircuits o danys.
- Ensure the subwoofer is not over-excursing.
- Subwoofer Overheating:
- Verifiqueu el amplifier's impedance load matches the subwoofer's wiring configuration.
- Assegureu-vos una ventilació adequada al voltant ampmés viu.
- Reduce prolonged high-volume playback.
If problems persist after troubleshooting, contact DD Audio customer support or a qualified service technician.
Especificacions
Detailed technical specifications for the DD Audio 312E-D2 12-inch Subwoofer:
| Especificació | Valor |
|---|---|
| Mida de l'altaveu | 12 polzades |
| Gestió de potència RMS | 500 watts |
| Manipulació de potència màxima | 1500 watts |
| Impedància | Dual 2-Ohm (D2) |
| Voice Coil Diameter (VCD) | 2.5 polzades |
| Freqüència de ressonància (Fs) | 37 Hz |
| Q mecànic (Qms) | 5.44 |
| Q elèctrica (Qes) | 0.73 |
| Q total (Qts) | 0.64 |
| Volum equivalent (Vas) | 22.31 litres |
| Factor de força (BL) | 26 TM |
| Mechanical Excursion (Xmech) | 30 MM |
| Excursió lineal (Xmax) | 14 MM |
| Frame Outer Diameter (OD) | 15.02 polzades |
| Frame OD with Gasket | 12.4 polzades |
| Diàmetre de muntatge | 13.89 polzades |
| Profunditat de muntatge | 7.32 polzades |
| Diàmetre del motor | 6.69 polzades |
| Motor Depth | 2.59 polzades |
| Pes de l'imant | 100 oz |
| Desplaçament del woofer | 0.1 CuFt |
| Recommended Ported Enclosure Volume | 1.75 - 2.75 CuFt |
| Pes de l'article | 17 lliures |
| Fabricant | Àudio DD |
| Nom del model | 312E-D2 |
Garantia i Suport
The DD Audio 312E-D2 subwoofer comes with a limited warranty. For specific warranty terms and conditions, please refer to the warranty card included with your product or visit the official DD Audio weblloc web. Conserveu el comprovant de compra per a reclamacions de garantia.
For technical support, service, or questions regarding your DD Audio product, please contact DD Audio customer service through their official website or authorized dealer.
DD Audio Official Weblloc: ddaudio.com





