REDCATT 8FHM

Woofer

Nominal diameter8″ / 224 mm
Resonance38 Hz
Q factor0.39
Sensitivity88.3 dB
Linear excursion± 9.1 mm
Program Power100 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 88.3dB

Thiele & Small parameters

  • Resonance frequency (free air) fS 38Hz
  • Mechanical quality factor QMS 12.90
  • Electrical quality factor QES 0.41
  • Total quality factor QTS 0.39

Large signal parameters

  • Maximum linear excursion (one way) xmax 9.1mm
  • Air volume displaced at xmax VD 188cm³
  • Power handling P 50W
  • Program power Pmax 100W

Voice Coil

  • Nominal impedance Z 4Ω
  • DC resistance RE 3.6Ω
  • Inductance (1kHz) LE 0.46mH
  • VC Diameter 35.6mm
  • Winding height HVC 18mm
  • Winding material Copper Clad Aluminium
  • Former material kapton

Magnet

  • Force factor Bl 8.19N/A
  • Motor constant Bl/√RE 4.32N/√W
  • Air gap height HAG 8mm
  • Material Ferrite

Diaphragm

  • Effective diameter 162mm
  • Effective area SD 206cm²
  • Moving mass MMS 31.5g
  • Moving mass (without air load) MMD 29.2g
  • Material CF Honeycomb

Suspensions

  • Stiffness KMS 1.83N/mm
  • Compliance CMS 548µm/N
  • Equivalent volume to the compliance VAS 32.1L
  • Mechanical resistance RMS 0.58N·s/m
  • Surround material Rubber
  • Spider material Nomex

Dimensions

  • Nominal diameter 8
  • 224mm
  • Overall diameter 224mm
  • Baffle cutout diameter 189mm
  • Mounting depth 95mm
  • Volume occupied by the driver (estimated) 1.2L
  • Net weight 2.8kg
REDCATT 8FHM SPL & Impedance
REDCATT 8FHM Dimensions

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