Peerless SDS-135F25CP05-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.7dB
• Frequency response 40 - 6000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 60Hz
• Mechanical quality factor QMS 3.75
• Electrical quality factor QES 0.63
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 47cm³
• Power handling P 40W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 0.273mH
• VC Diameter 25.7mm

Magnet

• Force factor Bl 4.57N/A
• Motor constant Bl/√RE 2.48N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 105mm
• Effective area SD 86.6cm²
• Moving mass MMS 10.2g
• Moving mass (without air load) MMD 9.6g
• Material Paper

Suspensions

• Stiffness KMS 1.45N/mm
• Compliance CMS 690µm/N
• Equivalent volume to the compliance VAS 7.37L
• Mechanical resistance RMS 1.03N·s/m
• Surround material NBR Rubber

Dimensions

• Nominal diameter 5″
• 133mm
• Volume occupied by the driver (estimated) 0.27L
• Net weight 0.7kg
• Frame material Pressed Steel