Peerless PLS-65F25AL01-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.7dB
• Frequency response 80 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 130Hz
• Mechanical quality factor QMS 4.46
• Electrical quality factor QES 1.07
• Total quality factor QTS 0.86

Large signal parameters

• Maximum linear excursion xmax 2.7mm
• Air volume displaced at xmax VD 5.6cm³
• Power handling P 25W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.041mH
• VC Diameter 25.7mm

Magnet

• Force factor Bl 2.38N/A
• Motor constant Bl/√RE 1.27N/√W
• Air gap height HAG 3mm
• Material Ferrite

Diaphragm

• Effective diameter 52mm
• Effective area SD 21.2cm²
• Moving mass MMS 2.18g
• Moving mass (without air load) MMD 2.1g
• Material Aluminum

Suspensions

• Stiffness KMS 1.39N/mm
• Compliance CMS 720µm/N
• Equivalent volume to the compliance VAS 0.499L
• Mechanical resistance RMS 0.4N·s/m
• Surround material NBR Rubber

Dimensions

• Nominal diameter 2.5″
• 64mm
• Volume occupied by the driver (estimated) 0.11L
• Net weight 0.31kg