Hertz HMS 10 B

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 41Hz
• Mechanical quality factor QMS 11.00
• Electrical quality factor QES 0.76
• Total quality factor QTS 0.71

Large signal parameters

• Maximum linear excursion xmax 13.5mm
• Maximum excursion before damage xlim 19mm
• Air volume displaced at xmax VD 465cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 4.5Ω
• Inductance (1kHz) LE 0.9mH
• VC Diameter 50mm

Magnet

• Force factor Bl 10.2N/A
• Motor constant Bl/√RE 4.81N/√W

Diaphragm

• Effective diameter 210mm
• Effective area SD 344cm²
• Moving mass MMS 69g
• Moving mass (without air load) MMD 64.5g

Suspensions

• Stiffness KMS 4.55N/mm
• Compliance CMS 220µm/N
• Equivalent volume to the compliance VAS 37L
• Mechanical resistance RMS 1.62N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Volume occupied by the driver (estimated) 1.5L