BMS 15S320

• Sensitivity (1W, 1m, infinite baffle) SPL1W 97.2dB
• Frequency response 40 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 5.00
• Electrical quality factor QES 0.29
• Total quality factor QTS 0.28

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 396cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.8mH
• VC Diameter 77mm
• Winding height HVC 19mm
• Winding material Copper

Magnet

• Force factor Bl 23.3N/A
• Motor constant Bl/√RE 9.76N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 335mm
• Effective area SD 880cm²
• Moving mass MMS 109g
• Moving mass (without air load) MMD 91g

Suspensions

• Stiffness KMS 7.14N/mm
• Compliance CMS 140µm/N
• Equivalent volume to the compliance VAS 154L
• Mechanical resistance RMS 5.62N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 358mm
• Overall depth 178mm
• Volume occupied by the driver (estimated) 4.6L
• Net weight 9.0kg
• Frame material Cast Aluminum