Peerless SDF-250F75PR01-06

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.2dB
• Frequency response 20 - 800Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 34Hz
• Mechanical quality factor QMS 11.40
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 15.3mm
• Air volume displaced at xmax VD 540cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 6Ω
• DC resistance RE 4.2Ω
• Inductance (1kHz) LE 0.822mH
• VC Diameter 75.6mm

Magnet

• Force factor Bl 14.6N/A
• Motor constant Bl/√RE 7.12N/√W
• Air gap height HAG 8mm
• Material Ferrite

Diaphragm

• Effective diameter 212mm
• Effective area SD 353cm²
• Moving mass MMS 115g
• Moving mass (without air load) MMD 110g
• Material Paper

Suspensions

• Stiffness KMS 5.26N/mm
• Compliance CMS 190µm/N
• Equivalent volume to the compliance VAS 32.9L
• Mechanical resistance RMS 2.16N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 254mm
• Volume occupied by the driver (estimated) 3.3L
• Net weight 7.4kg
• Frame material Cast Aluminium