Eighteen Sound 8MB500 8Ω

8Ω

Woofer

Nominal diameter	8″ / 200 mm
Resonance	74 Hz
Q factor	0.43
Sensitivity	93.4 dB
Linear excursion	± 6 mm
Program Power	400 W

Eighteen Sound 8MB500 8Ω Woofer

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 93.4dB
Frequency response 60 - 4500Hz

Thiele & Small parameters

Resonance frequency (free air) fS 74Hz
Mechanical quality factor QMS 2.66
Electrical quality factor QES 0.51
Total quality factor QTS 0.43

Large signal parameters

Maximum linear excursion (one way) xmax 6mm
Air volume displaced at xmax VD 138cm³
Power handling P 280W
Program power Pmax 400W

Voice Coil

Nominal impedance Z 8Ω
DC resistance RE 5.1Ω
Inductance (1kHz) LE 0.6mH
VC Diameter 51mm
Winding material Aluminum

Magnet

Force factor Bl 9N/A
Motor constant Bl/√RE 3.99N/√W
Material Ferrite

Diaphragm

Effective diameter 171mm
Effective area SD 230cm²
Moving mass MMS 17g
Moving mass (without air load) MMD 14.5g
Material Weather protected

Suspensions

Stiffness KMS 3.68N/mm
Compliance CMS 272µm/N
Equivalent volume to the compliance VAS 21.5L
Mechanical resistance RMS 2.97N·s/m

Dimensions

Nominal diameter 8″
200mm
Overall diameter 210mm
Baffle cutout diameter 186mm
Overall depth 99mm
Flange thickness 14mm
Mounting depth 85mm
Volume occupied by the driver (estimated) 1.1L
Net weight 3.4kg

Eighteen Sound 8MB500 8Ω SPL

Eighteen Sound 8MB500 8Ω Dimensions

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