Rockford Fosgate T1D415

2x2Ω
2x4Ω

Subwoofer

Nominal diameter15″ / 381 mm
Resonance27 Hz
Q factor0.51
Sensitivity87.5 dB
Linear excursion± 16.4 mm
Program Power2000 W
Driver
Port
Combined
Frequency response
Hz
Impedance
Ω
Impedance Phase
°
Excursion
mm
Velocity
m/s
SPL
dB
Acoustical Phase
°
Group Delay
ms
Transient response
ms
Discard
Apply
  • Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 27Hz
  • Mechanical quality factor QMS 6.00
  • Electrical quality factor QES 0.55
  • Total quality factor QTS 0.51

Large signal parameters

  • Maximum linear excursion xmax 16.4mm
  • Air volume displaced at xmax VD 1386cm³
  • Power handling P 1000W
  • Program power Pmax 2000W

Voice Coil

  • Nominal impedance Z 2 x 4Ω
  • DC resistance (in series) RE 6.5Ω
  • Inductance (1kHz, in series) LE 3.6mH
  • VC Diameter 76mm

Magnet

  • Force factor (in series) Bl 26.3N/A
  • Motor constant Bl/√RE 10.3N/√W
  • Weight 6.49kg

Diaphragm

  • Effective diameter 328mm
  • Effective area SD 845cm²
  • Moving mass MMS 344g
  • Moving mass (without air load) MMD 327g

Suspensions

  • Stiffness KMS 9.9N/mm
  • Compliance CMS 101µm/N
  • Equivalent volume to the compliance VAS 102L
  • Mechanical resistance RMS 9.73N·s/m

Dimensions

  • Nominal diameter 15
  • 381mm
  • Baffle cutout diameter 354mm
  • Mounting depth 213mm
  • Volume occupied by the driver 5.41L


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