Introducció
This manual provides comprehensive instructions for the installation, operation, and maintenance of your DD Audio 515E-D4 15-inch E-Series Dual 4-Ohm 2100W Subwoofer. Please read this manual thoroughly before attempting to install or operate the subwoofer to ensure proper function and longevity. Retain this manual for future reference.
Característiques clau
The DD Audio 515E-D4 subwoofer incorporates advanced design and materials for superior performance:
- Free Flow Cooling System: Designed to dissipate heat efficiently, enhancing durability.
- High-Temperature Voice Coil: Engineered 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 for improved linearity and excursion.
- DD Logo Basket: Aesthetically designed and structurally sound frame.
- Double Stitched EROM Surrounds: Ensures long-term durability and precise cone movement.
- 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.

Imatge 1: Part superior view of the DD Audio 515E-D4 subwoofer, showcasing el con i els seus voltants.
Configuració i instal·lació
Proper installation is crucial for optimal performance and safety. If you are unsure about any step, consult a professional installer.
1. Requisits de la carcassa
The 515E-D4 subwoofer is designed for use in a ported enclosure. Recommended enclosure volume is 3.0 to 5.0 cubic feet. Ensure the enclosure is robustly constructed and sealed to prevent air leaks.
2. Muntatge
- Ensure the mounting surface is flat and strong enough to support the subwoofer's weight (approximately 21 pounds).
- Cut a circular opening with a diameter of 13.89 inches (35.28 cm) in the enclosure.
- Carefully place the subwoofer into the opening, aligning the mounting holes.
- Secure the subwoofer using appropriate screws, ensuring even pressure around the frame. Do not overtighten.

Imatge 2: Lateral view of the DD Audio 515E-D4 subwoofer, illustrating the cone and surround profile.
3. Connexions de cablejat
The 515E-D4 features dual 4-Ohm voice coils. Proper wiring is essential for matching the subwoofer's impedance to your amplifier's capabilities. Refer to your ampmanual del lificador per a càrregues d'impedància compatibles.
- Cablejat en paral·lel (2 ohms): Connecteu els terminals positius de les dues bobines de veu i els terminals negatius de les dues bobines de veu. A continuació, connecteu el positiu combinat al ampla sortida positiva del lificador i la negativa combinada a la ampsortida negativa del lificador.
- Cablejat en sèrie (8 ohms): Connecteu el terminal positiu d'una bobina mòbil al terminal negatiu de l'altra bobina mòbil. A continuació, connecteu el terminal positiu restant al ampla sortida positiva del lificador i el terminal negatiu restant al ampsortida negativa del lificador.
Ensure all connections are secure and free from shorts. Use appropriate gauge wiring for the power levels involved.

Imatge 3: posterior view of the DD Audio 515E-D4 subwoofer, highlighting the magnet structure and wiring terminals.
Funcionament
1. Període de rodatge
Allow a break-in period of approximately 20-30 hours of moderate use before operating the subwoofer at its maximum potential. This allows the suspension components to loosen and settle, optimizing performance and longevity.
2. AmpConfiguració del guany del lificador
Estableix el teu amplifier's gain correctly to prevent clipping, which can damage the subwoofer. Start with the gain at its minimum and slowly increase it until you hear distortion, then back off slightly. It is recommended to use an oscilloscope or a distortion detector for precise gain setting.
3. Configuració del crossover
Utilize a low-pass filter (LPF) on your amplifier or head unit to send only low frequencies to the subwoofer. A typical LPF setting for this subwoofer would be between 60Hz and 80Hz, with a slope of 12dB or 24dB per octave. Experiment to find the best integration with your main speakers.

Imatge 4: Part posterior inclinada view of the DD Audio 515E-D4 subwoofer, showing the robust motor structure and terminal connections.
Manteniment
The DD Audio 515E-D4 subwoofer requires minimal maintenance. Follow these guidelines to ensure its longevity:
- Neteja: Netegeu periòdicament el con i el seu voltant amb un drap suau i sec per eliminar la pols i les restes. Eviteu utilitzar productes químics agressius o humitat excessiva.
- Inspecció: Regularly inspect the subwoofer for any signs of damage to the cone, surround, or dust cap. Check wiring connections for looseness or corrosion.
- Medi ambient: Ensure the subwoofer is installed in a stable environment, protected from extreme temperatures, direct sunlight, and moisture.
Resolució de problemes
| Problema | Causa possible | Solució |
|---|---|---|
| Sense so |
|
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| So distorsionat |
|
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| Sortida de greus feble |
|
|
Especificacions tècniques
| Paràmetre | Valor |
|---|---|
| Mida de l'altaveu | 15 polzades |
| Gestió de potència RMS | 700 watts |
| Manipulació de potència màxima | 2100 watts |
| Impedància | Doble 4 ohms |
| Voice Coil Diameter (VCD) | 3 polzades |
| Resonant Frequency (Fs) | 29 Hz |
| Q mecànic (Qms) | 6.2 |
| Q elèctrica (Qes) | 0.89 |
| Q total (Qts) | 0.77 |
| Volum equivalent (Vas) | 93.33 litres |
| Factor de força (BL) | 25 TM |
| Mechanical Excursion (Xmech) | 30 mm |
| Excursió lineal (Xmax) | 18 mm |
| Frame Outer Diameter (OD) | 15.02 polzades |
| Frame OD with Gasket | 15.4 polzades |
| Diàmetre de muntatge | 13.89 polzades |
| Profunditat de muntatge | 7.32 polzades |
| Diàmetre del motor | 7 polzades |
| Motor Depth | 2.375 polzades |
| Pes de l'imant | 120 oz |
| Desplaçament del woofer | 0.1 CuFt |
| Recommended Ported Enclosure Volume | 3.0 - 5.0 CuFt |
| Pes de l'article | 21 lliures |
| Tipus de muntatge | Muntatge d'escorredor |
| Fabricant | Àudio DD |
| Número de model | 515E-D4 |
Garantia i Suport
For specific warranty information and terms, please refer to the official DD Audio weblloc web o contacteu directament amb el seu servei d'atenció al client. Conserveu el comprovant de compra per a qualsevol reclamació de garantia.
For technical assistance or support, please visit the DD Audio website or contact their authorized service centers. When contacting support, please have your product model number (515E-D4) and purchase details readily available.
DD Audio Official Weblloc: www.ddaudio.com





