Description:

YOU ARE PURCHASING A USED ITEM.
Used products are sold as-is and may show signs of prior use, including cosmetic wear, scuffs, nicks, scratches, dents, damaged packaging, missing paperwork, missing accessories, or other imperfections unless otherwise stated in the product description.
You will receive a working item at a discounted price compared to regular pricing.

*Picture does not represent the actual item*
FINAL SALE/NO RETURNS

Upgrade your car audio experience with the DOWN4SOUND SB-10 Subwoofer, built to deliver precise, deep bass and exceptional clarity. Featuring a dual 4-ohm voice coil configuration and 500W RMS power handling, this subwoofer offers a perfect balance of compact design, durability, and high-performance audio. Engineered with a highly optimized suspension system and robust motor assembly, the SB-10 D4 is ideal for versatile installations and daily high-output use.

Key Features

500W RMS power handling
Dual 4-ohm voice coil configuration
2.5-inch high-temperature voice coil
21 mm one-way Xmax
Highly optimized suspension
Compact design suitable for versatile installs

Technical Specifications (T/S Parameters)

Revc (DC Resistance): 4.030 ohm
Resonance Frequency (Fs): 37.717 Hz
Qms: 3.510
Qes: 0.486
Qts: 0.427
Mms (Moving Mass): 158.478 g
Cms (Compliance): 158.882 m/N
Rms: 0.740
Vas: 25.653 L
Sd: 333.654 cm
BL Product: 16.190 Tm
Sensitivity (SPL): 84.1 dB
Xmax: 21 mm
Displacement: 0.09 cu ft

Engineering and Construction

Optimized suspension for accurate bass reproduction
Vented motor system for improved cooling
Precision-wound 2.5-inch voice coil
Durable cone and surround assembly
Compact motor design optimized for output and control

Recommended Enclosures

Ported: 1.0 cu ft (net)
Port Area: 15 sq in
Tuning: 35 Hz
Sealed: Not recommended

Physical Dimensions

Cutout Diameter: 9.06 in (230 mm)
Outside Diameter: 10.28 in (261 mm)
Mounting Depth: 6.46 in (164 mm)
Motor Height: 3.54 in (90 mm)
Net Weight: 21.9 lb
Gross Weight: 25.2 lb

Why You Should Buy

Powerful performance in a compact design
Dual 4-ohm coils enable flexible wiring options
Built for durability and long-term use
Optimized suspension delivers clean, precise low-frequency output

Ideal Applications

Ported enclosures for strong, accurate bass output
Tight installs needing high-performance low-frequency response
Daily-driven systems seeking clean, controlled bass
Builds requiring flexible wiring and reliable performance