Eighteen Sound 12W1300

• Sensitivity (1W, 1m, infinite baffle) SPL1W 94.9dB
• Frequency response 45 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 4.15
• Electrical quality factor QES 0.28
• Total quality factor QTS 0.26

Large signal parameters

• Maximum linear excursion xmax 7.5mm
• Maximum excursion before damage xlim 17mm
• Air volume displaced at xmax VD 398cm³
• Power handling P 700W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.2Ω
• Inductance (1kHz) LE 1.9mH
• VC Diameter 100mm
• Winding material Aluminum

Magnet

• Force factor Bl 20N/A
• Motor constant Bl/√RE 8.77N/√W
• Material Ferrite

Diaphragm

• Effective diameter 260mm
• Effective area SD 530cm²
• Moving mass MMS 72g
• Moving mass (without air load) MMD 63.3g
• Material Straight ribbed, carbon fiber cellulose

Suspensions

• Stiffness KMS 7.09N/mm
• Compliance CMS 141µm/N
• Equivalent volume to the compliance VAS 56L
• Mechanical resistance RMS 5.45N·s/m
• Surround material Triple roll, Polycotton

Dimensions

• Nominal diameter 12″
• 300mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 119mm
• Flange thickness 17mm
• Mounting depth 102mm
• Volume occupied by the driver (estimated) 3.3L
• Net weight 10.0kg