Eighteen Sound 12W750

4Ω

Subwoofer

Nominal diameter	12″ / 300 mm
Resonance	55 Hz
Q factor	0.27
Sensitivity	96.5 dB
Linear excursion	± 7 mm
Program Power	1200 W

Eighteen Sound 12W750 Subwoofer

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 96.5dB
Frequency response 50 - 4600Hz

Thiele & Small parameters

Resonance frequency (free air) fS 55Hz
Mechanical quality factor QMS 5.00
Electrical quality factor QES 0.28
Total quality factor QTS 0.27

Large signal parameters

Maximum linear excursion xmax 7mm
Air volume displaced at xmax VD 372cm³
Power handling P 600W
Program power Pmax 1200W

Voice Coil

Nominal impedance Z 4Ω
DC resistance RE 3.4Ω
Inductance (1kHz) LE 0.56mH
VC Diameter 75mm
Winding height HVC 19mm
Winding material Aluminum

Magnet

Force factor Bl 15.5N/A
Motor constant Bl/√RE 8.41N/√W
Air gap height HAG 10mm
Material Ferrite

Diaphragm

Effective diameter 260mm
Effective area SD 531cm²
Moving mass MMS 58g
Moving mass (without air load) MMD 49.4g
Material Weather protected

Suspensions

Stiffness KMS 6.94N/mm
Compliance CMS 144µm/N
Equivalent volume to the compliance VAS 58L
Mechanical resistance RMS 4.01N·s/m

Dimensions

Nominal diameter 12″
300mm
Overall diameter 310mm
Baffle cutout diameter 280mm
Overall depth 148mm
Flange thickness 11mm
Mounting depth 137mm
Volume occupied by the driver (estimated) 3.1L
Net weight 7.5kg

Eighteen Sound 12W750 SPL

Eighteen Sound 12W750 Dimensions

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