Hertz HMX 8 S

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.4dB
• Frequency response 45 - 25000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 11.00
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.58

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 107cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 0.52mH
• VC Diameter 32mm

Magnet

• Force factor Bl 6.6N/A
• Motor constant Bl/√RE 3.75N/√W
• Material High density flux ferrite

Diaphragm

• Effective diameter 174mm
• Effective area SD 237cm²
• Moving mass MMS 27.3g
• Moving mass (without air load) MMD 24.8g
• Material Polypropylene with UV inhibitors

Suspensions

• Stiffness KMS 2.7N/mm
• Compliance CMS 370µm/N
• Equivalent volume to the compliance VAS 29.5L
• Mechanical resistance RMS 0.78N·s/m

Dimensions

• Nominal diameter 8″
• 200mm
• Volume occupied by the driver (estimated) 0.82L