Peerless GBS-85N25PR07-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.2dB
• Frequency response 100 - 1000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 130Hz
• Mechanical quality factor QMS 5.37
• Electrical quality factor QES 0.81
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 10cm³
• Power handling P 12W
• Program power Pmax 24W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.308mH
• VC Diameter 25.7mm

Magnet

• Force factor Bl 4.48N/A
• Motor constant Bl/√RE 2.39N/√W
• Air gap height HAG 3mm
• Material Neodymium

Diaphragm

• Effective diameter 67mm
• Effective area SD 35.3cm²
• Moving mass MMS 5.74g
• Moving mass (without air load) MMD 5.6g
• Material Paper

Suspensions

• Stiffness KMS 3.85N/mm
• Compliance CMS 260µm/N
• Equivalent volume to the compliance VAS 0.465L
• Mechanical resistance RMS 0.87N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 3.5″
• 89mm
• Volume occupied by the driver (estimated) 0.1L
• Net weight 0.121kg