VOLT B251.8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 88.4dB
• Frequency response 24 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 31Hz
• Mechanical quality factor QMS 1.82
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 5mm
• Maximum excursion before damage xlim 12.5mm
• Air volume displaced at xmax VD 162cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.8Ω
• Inductance (1kHz) LE 0.94mH
• VC Diameter 38mm
• Winding height HVC 19mm
• Winding material Copper

Magnet

• Force factor Bl 11.7N/A
• Motor constant Bl/√RE 4.87N/√W
• Air gap height HAG 9.5mm
• Diameter 134mm
• Weight 3.6kg

Diaphragm

• Effective diameter 203mm
• Effective area SD 323cm²
• Moving mass MMS 53.7g
• Moving mass (without air load) MMD 49.3g

Suspensions

• Stiffness KMS 2.04N/mm
• Compliance CMS 490µm/N
• Equivalent volume to the compliance VAS 72.6L
• Mechanical resistance RMS 5.74N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 261mm
• Baffle cutout diameter 253mm
• Overall depth 119mm
• Volume occupied by the driver 1.1L
• Net weight 4.9kg
• Frame material Diecast Aluminium