SEAS E0042-08S W18NX001

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.3dB
• Frequency response 30 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 40Hz
• Mechanical quality factor QMS 2.08
• Electrical quality factor QES 0.41
• Total quality factor QTS 0.34

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 11mm
• Air volume displaced at xmax VD 88cm³
• Power handling P 80W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.43mH
• VC Diameter 39mm
• Winding height HVC 20mm

Magnet

• Flux density B 1T
• Force factor Bl 7N/A
• Motor constant Bl/√RE 2.79N/√W
• Air gap height HAG 6mm
• Weight 0.64kg

Diaphragm

• Effective diameter 127mm
• Effective area SD 126cm²
• Moving mass MMS 13.7g
• Moving mass (without air load) MMD 12.6g

Suspensions

• Stiffness KMS 0.833N/mm
• Compliance CMS 1200µm/N
• Equivalent volume to the compliance VAS 24L
• Mechanical resistance RMS 1.77N·s/m

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver (estimated) 0.89L
• Net weight 2.15kg