DOWN4SOUND | DBZ 15″ SUBWOOFER | 1300W RMS | D4

The DOWN4SOUND DBz-15 D4 is built for listeners who want massive bass output, rugged construction, and unbeatable value. With a true 1300W RMS rating, this 15-inch subwoofer is designed to deliver aggressive low-frequency performance in daily-driven systems and high-output builds. Featuring a dual 4-ohm voice coil configuration and a real carbon fiber dustcap, the DBz-15 D4 offers strong durability, versatile wiring options, and powerful bass response. Key Features 1300W RMS power handling Dual 4-ohm voice coil design 2.75-inch high-temperature voice coil 30 mm Xmax Real carbon fiber dustcap Advanced motor venting for improved cooling Heavy-duty motor structure Technical Specifications (T/S Parameters) Revc (DC Resistance): 6.050 ohm Resonance Frequency (Fs): 39.561 Hz Qms: 2.826 Qes: 0.714 Qts: 0.570 Mms (Moving Mass): 435.722 g Cms (Compliance): 37.445 m/N Rms: 0.774 Vas: 40.977 L Sd: 88.141 cm BL Product: 30.322 Tm Sensitivity (SPL): 87.4 dB Xmax: 30 mm Displacement: 0.19 cu ft Engineering and Construction Extended pole piece for linear excursion Rear gap and pole venting for improved airflow and cooling Long-fiber spider system for suspension control Precision-wound 2.75-inch coil for high thermal capacity Premium carbon fiber dustcap for added rigidity Recommended Enclosure Sealed: 2.0 cubic feet Ported: 3.0 cubic feet Recommended Tuning: 32 Hz Recommended Port Area: 36 to 45 square inches total Physical Dimensions Cutout Diameter: 13.86 in (352 mm) Mounting Depth: 8.43 in (214 mm) Outside Diameter: 15.59 in (396 mm) Motor Diameter: 13.74 in (349 mm) Net Weight: 34 lb Gross Weight: 37.9 lb Why You Should Buy Strong 1300W RMS performance Deep, powerful low-frequency output Dual 4-ohm coils for flexible wiring Durable construction capable of handling high SPL Carbon fiber dustcap for strength and visual appeal Ideal Applications Daily-driven systems needing deep, powerful bass Ported or sealed enclosures in SUVs, sedans, hatchbacks, and trucks Systems tuned in the 2835 Hz range for fuller low-end performance SQL-style daily setups requiring both punch and depth Users seeking high-value performance without sacrificing output