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15" Subwoofers

When a 12 is not enough and an 18 will not fit, a 15 delivers the deep, room-filling low end that bass heads chase. Shop 15 inch subwoofers from Sundown Audio, Crossfire Car Audio and Sparked Innovations, including the Crossfire C5-V3, C7-V3, XT3 and XT4, the Sundown U-Series v.2, E-Series v.4 and X-Series v.3, and the Sparked SQL-2000 and Bass Blaster SQL in D2 and D4.

  • 31 products
  • Crossfire Car Audio · Sparked Innovations · Sundown Audio
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31 products

Are 15 Inch Subwoofers Right for Your Vehicle

A 15 has much more cone area than a 12, so it moves more air at low frequencies and plays the bottom end of hip-hop, dubstep and pipe organ recordings with authority. The trade-off is enclosure size: a ported 15 box can take up most of a sedan trunk, so these subs shine in SUVs, vans, hatchbacks and extended-cab trucks where cargo space is easier to spare.

Power and Electrical Planning

Bigger cones usually come with bigger power appetites. The Crossfire C5-V3 (600 watts RMS) works on a mid-size monoblock, while the C7-V3 (1600 watts RMS), the Sundown X-Series v.3 in D1 and the 2000 watt Sparked models call for strong amplifiers and a charging system that can keep up. As amp power climbs, consider a Big 3 upgrade with heavy gauge wire, an AGM or lithium battery setup, and power and ground runs sized for the current draw.

Wiring options

A single D1 15 can run at 0.5 or 2 ohms, a D2 at 1 or 4 ohms and a D4 at 2 or 8 ohms. Choose the coil so the final load suits your amp, because running below its stable impedance risks overheating and protection mode.

Boxes and Related Sizes

Most 15 inch subwoofers are happiest in the airspace their manual recommends, and ported boxes reward that extra volume with output near tuning. Pair with a monoblock from our amplifiers collection, and compare 18 inch subwoofers if you have even more room or 12 inch subwoofers if space is tight. Browse every size and brand under subwoofers.