Dayton Audio DA135-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.7dB
• Frequency response 50 - 15000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 56.5Hz
• Mechanical quality factor QMS 2.61
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.54

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 23cm³
• Power handling P 30W
• Program power Pmax 60W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.4Ω
• Inductance (1kHz) LE 0.97mH
• VC Diameter 25mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor Bl 5.32N/A
• Motor constant Bl/√RE 2.1N/√W
• Material Ferrite

Diaphragm

• Effective diameter 98mm
• Effective area SD 75.4cm²
• Moving mass MMS 8.54g
• Moving mass (without air load) MMD 8g
• Material Aluminum

Suspensions

• Stiffness KMS 1.08N/mm
• Compliance CMS 930µm/N
• Equivalent volume to the compliance VAS 7.4L
• Mechanical resistance RMS 1.16N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 5.25″
• 135mm
• Overall diameter 135mm
• Baffle cutout diameter 112mm
• Overall depth 63mm
• Volume occupied by the driver (estimated) 0.26L
• Frame material Steel