Scan-Speak Revelator 32W/4878T01

Woofer

Nominal diameter12″ / 320 mm
Resonance23 Hz
Q factor0.28
Sensitivity89.9 dB
Linear excursion± 7 mm
Program Power400 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 89.9dB
  • Frequency response 23 - 1500Hz

Thiele & Small parameters

  • Resonance frequency (free air) fS 23Hz
  • Mechanical quality factor QMS 6.00
  • Electrical quality factor QES 0.30
  • Total quality factor QTS 0.28

Large signal parameters

  • Maximum linear excursion xmax 7mm
  • Maximum excursion before damage xlim 28mm
  • Air volume displaced at xmax VD 368cm³
  • Power handling P 150W
  • Program power Pmax 400W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.1Ω
  • Inductance (1kHz, estimated) LE 1.59mH
  • VC Diameter 75mm
  • Winding height HVC 22mm
  • Former material Titanium

Magnet

  • Force factor Bl 13N/A
  • Motor constant Bl/√RE 7.38N/√W
  • Air gap height HAG 8mm

Diaphragm

  • Effective diameter 260mm
  • Effective area SD 526cm²
  • Moving mass MMS 112g
  • Moving mass (without air load) MMD 103g
  • Material Paper sandwich

Suspensions

  • Stiffness KMS 2.33N/mm
  • Compliance CMS 430µm/N
  • Equivalent volume to the compliance VAS 170L
  • Mechanical resistance RMS 2.7N·s/m

Dimensions

  • Nominal diameter 12
  • 320mm
  • Volume occupied by the driver 2.65L
  • Net weight 7.5kg
  • Frame material Die cast Aluminium
Scan-Speak 32W/4878T01 SPL & Impedance
Scan-Speak 32W/4878T01 Dimensions

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