DOWN4SOUND | DBZ 10″ SUBWOOFER | 1300W RMS | D4

The DOWN4SOUND DBz-10 D4 is built for car audio enthusiasts seeking massive bass, rugged performance, and unbeatable value. Delivering a true 1300W RMS, this subwoofer produces strong, punchy bass without demanding a premium budget. With a dual 4-ohm voice coil configuration, the DBz-10 D4 offers wiring flexibility for a wide variety of amplifier setups. Its real carbon fiber dustcap adds a sleek aesthetic while improving rigidity and long-term durability.
Built to perform in both compact and mid-sized enclosures, the DBz-10 D4 delivers serious output for daily drivers, demo setups, and cost-effective high-performance builds.

Key Features

1300W RMS power handling
Dual 4-ohm voice coil design
2.75-inch high-temperature voice coil
28 mm one-way Xmax for extreme linear excursion
Real carbon fiber dustcap for strength, rigidity, and premium appearance
Advanced venting throughout the motor structure for improved cooling
Heavy-duty build engineered for long-term high-output use

Technical Specifications (T/S Parameters)

Revc (DC Resistance): 6.050 ohm
Resonance Frequency (Fs): 40.803 Hz
Qms: 2.360
Qes: 0.510
Qts: 0.420
Mms (Moving Mass): 331.124 g
Cms (Compliance): 45.948 m/N
Rms: 0.795
Vas: 8.600 L
Sd: 56.305 cm
BL Product: 31.746 Tm
Sensitivity (SPL): 82.5 dB
Xmax: 28 mm (one-way, mechanical)
Displacement: 0.09 cu ft

Engineering and Construction

High-efficiency motor system engineered for aggressive output
Rear gap and pole venting for improved cooling and reduced thermal compression
Reinforced suspension designed for reliable high-excursion performance
Precision-wound 2.75″ voice coil built for thermal strength
Premium carbon fiber dustcap improves rigidity and reduces cone flex
Built to maximize output while maintaining long-term durability

Recommended Enclosures
Sealed Enclosure:

0.5 cubic foot (net)

Ported Enclosure:

1.0 cubic foot (net)
Recommended Tuning: 32 Hz
Recommended Port Area: 1215 square inches total port area

This enclosure range gives the DBz-10 D4 excellent balance between low-end extension and punchy upper bass for daily listening while maintaining proper airflow through the port.

Physical Dimensions

Cutout Diameter: 9.45 in (240 mm)
Mounting Depth: 7.36 in (187 mm)
Outside Diameter: 10.79 in (274 mm)
Motor Diameter: 7.48 in (190 mm)
Net Weight: 31.7 lb (14.4 kg)
Gross Weight: 35.3 lb (16.0 kg)

Why You Should Buy the DBz-10 D4

Delivers true 1300W RMS performance suitable for demanding systems
Compact footprint with impressive output capability
Dual 4-ohm coils provide wiring flexibility across common amplifier setups
Carbon fiber dustcap enhances both appearance and structural rigidity
Perfect blend of affordability, durability, and daily-driving performance

Ideal Applications

Daily-driven builds needing high output without large enclosure requirements
Systems tuned in the 2835 Hz range, where the DBz-10 D4 produces deep, rolling lows enhanced by real cabin gain
Ported or sealed enclosures in sedans, SUVs, hatchbacks, and trucks
SQL-style daily setups seeking a balance of low-end authority and punch
Users wanting responsive, aggressive bass performance at a budget-friendly price