Ciare HM087

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 270Hz
• Mechanical quality factor QMS 4.40
• Electrical quality factor QES 2.02
• Total quality factor QTS 1.39

Large signal parameters

• Maximum linear excursion xmax 2.1mm
• Air volume displaced at xmax VD 7.4cm³
• Power handling P 30W
• Program power Pmax 90W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.3Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 20mm
• Winding height HVC 6.2mm
• Former material Aluminum

Magnet

• Force factor Bl 4.14N/A
• Motor constant Bl/√RE 1.53N/√W
• Air gap height HAG 4mm

Diaphragm

• Effective diameter 67mm
• Effective area SD 35cm²
• Moving mass MMS 2.79g
• Moving mass (without air load) MMD 2.6g
• Material Treated Cellulose

Suspensions

• Stiffness KMS 8.33N/mm
• Compliance CMS 120µm/N
• Equivalent volume to the compliance VAS 0.2L
• Mechanical resistance RMS 1.08N·s/m
• Surround material Doped fabric

Dimensions

• Nominal diameter 3.5″
• 87mm
• Overall diameter 87mm
• Baffle cutout diameter 77mm
• Overall depth 42mm
• Flange thickness 5mm
• Mounting depth 37mm
• Volume occupied by the driver (estimated) 0.11L
• Net weight 0.37kg
• Frame material Steel