Ciare HS251

• Sensitivity (1W, 1m, infinite baffle) SPL1W 93.1dB

Thiele & Small parameters

• Resonance frequency (free air) fS 30Hz
• Mechanical quality factor QMS 7.21
• Electrical quality factor QES 0.43
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 10mm
• Air volume displaced at xmax VD 346cm³
• Power handling P 100W
• Program power Pmax 200W

Voice Coil

• Nominal impedance Z 2 x 8Ω
• DC resistance (in series) RE 11.6Ω
• Inductance (1kHz, in series) LE 8.06mH
• VC Diameter 50mm
• Winding height HVC 24mm
• Former material Kapton

Magnet

• Force factor (in series) Bl 39.8N/A
• Motor constant Bl/√RE 8.27N/√W
• Air gap height HAG 8mm

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 79.1g
• Moving mass (without air load) MMD 74.3g
• Material Treated Cellulose

Suspensions

• Stiffness KMS 2.63N/mm
• Compliance CMS 380µm/N
• Equivalent volume to the compliance VAS 63.2L
• Mechanical resistance RMS 2.07N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 268mm
• Baffle cutout diameter 235mm
• Overall depth 127mm
• Flange thickness 5mm
• Mounting depth 122mm
• Volume occupied by the driver (estimated) 1.8L
• Net weight 4.2kg
• Frame material Aluminium