The NVX S-Series Subwoofers, specifically the SMW10D4 and SMW12D4 models, are component subwoofers designed for automotive audio systems. These subwoofers are engineered to deliver optimized performance, durability, and usability within a vehicle environment, reflecting extensive research, development, and real-world testing.
Function Description:
The primary function of the NVX S-Series Subwoofers is to reproduce low-frequency audio (bass) in a car audio system, complementing full-range speakers. They are designed to provide deep, accurate, and powerful bass response, enhancing the overall listening experience. The subwoofers are intended to be installed in custom enclosures, with specific sealed and ported box recommendations provided to achieve optimal acoustic performance.
Important Technical Specifications:
SMW10D4 (10-inch model):
- Power Range (RMS): 350 Watts, indicating its continuous power handling capability.
- Voice Coil(s): Dual, allowing for flexible wiring configurations to match amplifier impedance.
- Voice Coil Diameter: 2 inches, designed for robust power handling and heat dissipation.
- Impedance per Voice Coil: 4 Ohms, a common impedance for car audio applications.
- Frequency Response: 25 - 350 Hz, covering the typical range for subwoofer output.
- Xmax: 8 mm, representing the maximum linear excursion of the cone.
- Fs (Resonant Frequency): 35.83 Hz.
- Vas (Equivalent Volume): 34.71 Liters.
- Sd (Cone Area): 53.6 in² / 0.0346 m².
- Qts (Total Q Factor): 0.5525.
- Qes (Electrical Q Factor): 0.6216.
- SPL (Sensitivity at 2.83V/1M): 88 dB, indicating its efficiency.
- Re (DC Resistance): 6.4 Ohms.
- Qms (Mechanical Q Factor): 4.9677.
- Net Weight: 8.4 lbs.
- Overall Diameter (A): 10.125 inches.
- Mounting Diameter (B): 9.75 inches.
- Cutout Diameter (C): 9.25 inches.
- Mounting Depth (D): 3.25 inches, highlighting its shallow mount design.
SMW12D4 (12-inch model):
- Power Range (RMS): 400 Watts, offering higher power handling than the 10-inch model.
- Voice Coil(s): Dual.
- Voice Coil Diameter: 2.5 inches, providing even greater power handling and heat dissipation.
- Impedance per Voice Coil: 4 Ohms.
- Frequency Response: 25 - 350 Hz.
- Xmax: 8 mm.
- Fs (Resonant Frequency): 29.1 Hz.
- Vas (Equivalent Volume): 64.86 Liters.
- Sd (Cone Area): 79.2 in² / 0.0511 m².
- Qts (Total Q Factor): 0.5734.
- Qes (Electrical Q Factor): 0.6448.
- SPL (Sensitivity at 2.83V/1M): 88 dB.
- Re (DC Resistance): 6.4 Ohms.
- Qms (Mechanical Q Factor): 5.1827.
- Net Weight: 11 lbs.
- Overall Diameter (A): 12.3125 inches.
- Mounting Diameter (B): 11.75 inches.
- Cutout Diameter (C): 11.375 inches.
- Mounting Depth (D): 3.9375 inches, also featuring a shallow mount design.
Recommended Enclosure Specifications:
Sealed Box:
- SMW10D4: 0.75 cubic feet / 21 Liters, QTC 0.797, F3 52.8 Hz.
- SMW12D4: 1.2 cubic feet / 34 Liters, QTC 0.854, F3 42.8 Hz.
Sealed enclosures are recommended for optimum performance, offering improved acoustic suspension, cone control, reduced distortion, and flatter bass responses.
Ported Box:
- SMW10D4: 1.25 cubic feet / 35.5 Liters, Fb 34 Hz, FC 33.1 Hz.
- SMW12D4: 1.75 cubic feet / 50 Liters, Fb 34 Hz, FC 31.3 Hz.
Ported enclosures provide improved efficiency and low-frequency response but are generally larger than sealed alternatives.
Usage Features:
- Ultra-Light & Durable Polypropylene Cone With a Reinforced Carbon Fiber Dust Cap: This material choice ensures the subwoofer remains accurate and responsive even at high volume levels due to its stiffness and lightweight properties.
- Versatile Shallow Mounting Depth Design: The S-Series woofers are NVX's first true shallow mount subwoofers, enabling installation in smaller enclosures that take up less space in trunks or hatches, making them suitable for a wider range of vehicles and custom installations.
- High-Temperature Aluminum Voice Coil: The 2-inch (SMW10D4) or 2.5-inch (SMW12D4) voice coils are designed to handle significant power and dissipate heat effectively, contributing to the subwoofer's durability and consistent performance.
- Chrome-Plated, Spring-Loaded Push Terminals: These terminals simplify the installation process by providing a secure and easy connection for speaker wires.
Maintenance Features:
The manual does not explicitly detail specific maintenance procedures for the subwoofers themselves, implying that they are largely maintenance-free once installed correctly. However, general best practices for car audio components would apply, such as ensuring proper enclosure sealing and avoiding physical damage to the cone or surround.
Warranty and Service:
NVX offers a one (1) year warranty from the date of purchase, covering defective materials and workmanship, provided the product is properly used and maintained.
- Warranty Service: Defective products should ideally be returned to the place of purchase. If direct return to NVX is necessary, customers must obtain an RA Number online, package all defective components in original or protective packaging, include a copy of the original receipt, and ship the package freight prepaid to NVX's returns department.
- Limitations: The warranty is voided by improper installation, misuse, abuse, accident, neglect, mishandling, ordinary wear, environmental deterioration, cosmetic damage, altered/missing serial numbers, purchase from unauthorized dealers, transfer of ownership, or damage due to overpowering (burnt voice coils, ripped spiders/surrounds).
- Contact Information: For warranty support or general inquiries, customers can visit nvx.com/support, email cs@nvx.com, or call 502.200.8010. The physical address for returns is 10645 Freeport Dr, Louisville, KY 40258-1873.
The NVX S-Series Subwoofers are designed for car audio enthusiasts seeking a balance of performance, compact design, and robust construction, backed by a comprehensive warranty and support system.
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