SEAS H1571-08 U18RNX/P

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB
• Frequency response 45 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 43Hz
• Mechanical quality factor QMS 2.05
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 6mm
• Maximum excursion before damage xlim 7.5mm
• Air volume displaced at xmax VD 76cm³
• Power handling P 80W
• Program power Pmax 250W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.9Ω
• Inductance (1kHz) LE 0.25mH
• VC Diameter 39mm
• Winding height HVC 18mm

Magnet

• Flux density B 1T
• Force factor Bl 6.9N/A
• Motor constant Bl/√RE 2.84N/√W
• Air gap height HAG 6mm
• Weight 0.64kg

Diaphragm

• Effective diameter 127mm
• Effective area SD 126cm²
• Moving mass MMS 13.5g
• Moving mass (without air load) MMD 12.4g

Suspensions

• Stiffness KMS 1N/mm
• Compliance CMS 1000µm/N
• Equivalent volume to the compliance VAS 22L
• Mechanical resistance RMS 1.78N·s/m

Dimensions

• Nominal diameter 8″
• 180mm
• Volume occupied by the driver (estimated) 0.78L
• Net weight 1.9kg