Peerless SLS-85S25CP04-08

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83dB

Thiele & Small parameters

• Resonance frequency (free air) fS 73.7Hz
• Mechanical quality factor QMS 4.95
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.40

Large signal parameters

• Maximum linear excursion xmax 4.5mm
• Air volume displaced at xmax VD 14cm³
• Power handling P 25W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.27mH
• VC Diameter 25.7mm
• Former material Kapton

Magnet

• Force factor Bl 5.4N/A
• Motor constant Bl/√RE 2.13N/√W
• Air gap height HAG 6mm

Diaphragm

• Effective diameter 63mm
• Effective area SD 30.8cm²
• Moving mass MMS 4.3g
• Moving mass (without air load) MMD 4.2g

Suspensions

• Stiffness KMS 0.92N/mm
• Compliance CMS 1087µm/N
• Equivalent volume to the compliance VAS 1.48L
• Mechanical resistance RMS 0.4N·s/m

Dimensions

• Nominal diameter 3.5″
• 89mm
• Volume occupied by the driver (estimated) 0.35L
• Net weight 0.88kg