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Rockford Fosgate T1D415 Power 15″ T1 4-Ohm DVC Subwoofer

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SKU: T1D415
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Builds on Innovative New Rockford Fosgate Technologies


Innovative technologies allow the T1D415 subwoofer to perform like a larger woofer over the previous model. The T1 15” features dual 4-Ohm voice coils, 1,000 Watts RMS power handling, and includes a grille with integral trim ring.


The Power Series T1D415 Dual 4-Ohm subwoofer builds on innovative new Rockford Fosgate technologies. These bad boys have patented VAST technology that increases surface cone area up to 25%. The new FlexFit basket not only looks the part but it provides extreme flexibility for extreme installations. Clean, high tech and ready to set off car alarms, the T1D415 is here!


  • Symmetrical dual progressive roll tear resistant poly-cotton spiders
  • Periodic-stitched fatigue resistant tinsel lead wire
  • Proprietary 8 AWG insulated allmetal input spring terminal connection
  • High-temp voice coil with spun-laced Nomex® re-inforcement collar
  • Optimized and matched magnetic and complicance geometry
  • Anodized aluminum heat sinking dust cap
  • Kevlar fiber reinforced paper cone
  • Rigid die-cast aluminum basket
  • Optimized pole piece and spider venting
  • Anodized aluminum voice coil former / copper clad aluminum wire


  • Size 15″
  • Nominal Impedance Dual 4-Ohm
  • Power Handling (Watts RMS) 1000 Watts RMS, 2000 Watts Max
  • Magnet Weight (oz) 229 oz. (6.49 kg)
  • Voice Coil Diameter 3.0″ (75.5 mm)
  • Mounting Depth 8.39 in. (213 mm)
  • Fs (Hz) 27
  • Qts 0.51
  • Qms 6.00
  • Cutout Diameter 13.9375 in. (354 mm)
  • Woofer Displacement 0.191 cu. ft. (5.4 Liters)
  • Le (mH) 3.6
  • Speaker Connector Compression Terminal
  • Shipping Weight 54.1 Lbs. (24.53 Kg.)
  • SPL (dB @ 1w/1m) 87.5
  • Qes 0.55
  • Vas (Liters) 102.0
  • Xmax (mm) 16.4
  • Re (Ohms) 6.50
  • Sd (cm2) 845
  • CEA-2031 Compliant
  • Subwoofer Type Standard
  • Voice Coil Type Dual Voice Coil
  • Sealed Box Volume (Vb) 2.25 cu. ft. (63.7 Liters)
  • Vented Box Volume (Vb) 2.66 cu. ft. (75.3 Liters)

Rockford Fosgate T1D415 Specs

Weight 24.53 kg

Rockford Fosgate: Revolutionizing Audio in Automotive, Marine, and Motorcycle Industries

Rockford Fosgate, an iconic American brand, has carved a niche in the audio industry, particularly in automotive, marine, and motorcycle sectors. Known for their robust and high-quality audio products, Rockford Fosgate continues to innovate and provide exceptional sound systems that cater to audiophiles and enthusiasts who demand superior sound quality and durability in challenging environments.

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