Down4Sound TCX12D1

2x1Ω

Subwoofer

Nominal diameter12″ / 305 mm
Resonance36.5 Hz
Q factor0.40
Sensitivity90.2 dB
Linear excursion± 39 mm
Program Power5400 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

Specifications

  • Sensitivity (1W, 1m, infinite baffle) SPL1W 90.2dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 36.5Hz
  • Mechanical quality factor QMS 3.95
  • Electrical quality factor QES 0.46
  • Total quality factor QTS 0.40

Large signal parameters

  • Maximum linear excursion (one way) xmax 39mm
  • Air volume displaced at xmax VD 4423cm³
  • Power handling P 2700W
  • Program power Pmax 5400W

Voice Coil

  • Nominal impedance Z 2 x 1Ω
  • DC resistance (in series) RE 1.6Ω
  • Inductance (1kHz, in series, estimated) LE 2.25mH
  • VC Diameter 76.2mm
  • Winding material flat aluminum
  • Former material anodized aluminum

Magnet

  • Force factor (in series) Bl 20.2N/A
  • Motor constant Bl/√RE 16N/√W
  • Diameter 240mm
  • Material Y35 ferrite

Diaphragm

  • Effective diameter 380mm
  • Effective area SD 1134cm²
  • Moving mass MMS 508g
  • Moving mass (without air load) MMD 494g
  • Material Carbon fiber

Suspensions

  • Stiffness KMS 24.4N/mm
  • Compliance CMS 41µm/N
  • Equivalent volume to the compliance VAS 9.18L
  • Mechanical resistance RMS 29.5N·s/m
  • Surround material Stitched high-roll
  • Spider material Triple-spider

Dimensions

  • Nominal diameter 12
  • 305mm
  • Overall diameter 313mm
  • Baffle cutout diameter 275mm
  • Mounting depth 311mm
  • Volume occupied by the driver 7.08L
  • Net weight 44.8kg

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