WVL AC-1638

• Sensitivity (1W, 1m, infinite baffle) SPL1W 96.5dB
• Frequency response 54 - 10000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 54.5Hz
• Mechanical quality factor QMS 10.11
• Electrical quality factor QES 0.21
• Total quality factor QTS 0.21

Large signal parameters

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.4Ω
• Inductance (1kHz) LE 1.67mH
• Winding material Aluminum
• Former material Paper

Magnet

• Force factor Bl 10.1N/A
• Motor constant Bl/√RE 3.7N/√W
• Material Field Coil

Diaphragm

• Effective diameter 155mm
• Effective area SD 187cm²
• Moving mass MMS 8.57g
• Moving mass (without air load) MMD 6.6g
• Material Paper craft

Suspensions

• Stiffness KMS 1N/mm
• Compliance CMS 1000µm/N
• Equivalent volume to the compliance VAS 49.7L
• Mechanical resistance RMS 0.29N·s/m
• Surround material Soft foam

Dimensions

• Nominal diameter 8″
• 203mm
• Overall diameter 203mm
• Baffle cutout diameter 191mm
• Overall depth 185mm
• Flange thickness 12mm
• Mounting depth 173mm
• Volume occupied by the driver (estimated) 1.9L
• Frame material Aluminium