BMS 15N620

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.4dB
• Frequency response 35 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 5.90
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 484cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.7Ω
• Inductance (1kHz) LE 0.65mH
• VC Diameter 77mm
• Winding height HVC 19mm
• Winding material Copper

Magnet

• Force factor Bl 20.6N/A
• Motor constant Bl/√RE 8.63N/√W
• Air gap height HAG 8mm
• Material Neodymium

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 4.76N·s/m

Dimensions

• Nominal diameter 15″
• 388mm
• Overall diameter 388mm
• Baffle cutout diameter 358mm
• Overall depth 174mm
• Volume occupied by the driver (estimated) 2.5L
• Net weight 3.7kg
• Frame material Cast Aluminum