Peerless SLS-85S25CP04-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.4dB
• Frequency response 200 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 5.41
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.36

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 21cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 0.169mH
• VC Diameter 25.7mm

Magnet

• Force factor Bl 4.3N/A
• Motor constant Bl/√RE 2.4N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 64mm
• Effective area SD 32.2cm²
• Moving mass MMS 4.86g
• Moving mass (without air load) MMD 4.7g
• Material Paper

Suspensions

• Stiffness KMS 1.03N/mm
• Compliance CMS 970µm/N
• Equivalent volume to the compliance VAS 1.43L
• Mechanical resistance RMS 0.41N·s/m

Dimensions

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