Fi Car Audio BTL4 15 D2

2x1Ω
2x2Ω

Subwoofer

Nominal diameter15″ / 397 mm
Resonance27.2 Hz
Q factor0.46
Sensitivity86.8 dB
Linear excursion± 33 mm
Program Power7000 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 86.8dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 27.2Hz
  • Mechanical quality factor QMS 6.66
  • Electrical quality factor QES 0.50
  • Total quality factor QTS 0.46

Large signal parameters

  • Maximum linear excursion xmax 33mm
  • Air volume displaced at xmax VD 2673cm³
  • Power handling P 3500W
  • Program power Pmax 7000W

Voice Coil

  • Nominal impedance Z 2 x 2Ω
  • DC resistance (in series) RE 2.8Ω
  • Inductance (1kHz, in series, estimated) LE 3.52mH

Magnet

  • Force factor (in series) Bl 20.2N/A
  • Motor constant Bl/√RE 12.1N/√W

Diaphragm

  • Effective diameter 321mm
  • Effective area SD 810cm²
  • Moving mass MMS 430g
  • Moving mass (without air load) MMD 413g

Suspensions

  • Stiffness KMS 12.8N/mm
  • Compliance CMS 78µm/N
  • Equivalent volume to the compliance VAS 71.1L
  • Mechanical resistance RMS 11N·s/m

Dimensions

  • Nominal diameter 15
  • 397mm
  • Overall diameter 397mm
  • Baffle cutout diameter 359mm
  • Mounting depth 222mm
  • Volume occupied by the driver 2.55L


Similar subwoofers to Fi Car Audio BTL4 15 D2

Fi Car Audio BTL4 15 D1 Subwoofer

Fi Car Audio BTL4 15 D1

2 x 1 Ω
15 Subwoofer
fS27.1 Hz
SD810 cm²
QTS0.46
xmax33 mm
SPL1W86.8 dB
Bl/√RE12.1
Pmax7000 W