Dayton Audio SD315A-88

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.2dB
• Frequency response 24 - 2000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 24.2Hz
• Mechanical quality factor QMS 3.54
• Electrical quality factor QES 0.37
• Total quality factor QTS 0.33

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 366cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 2 x 8Ω
• DC resistance (in series) RE 12.4Ω
• Inductance (1kHz, in series) LE 6mH
• VC Diameter 49.5mm
• Winding material Copper
• Former material Aluminum

Magnet

• Force factor (in series) Bl 23.7N/A
• Motor constant Bl/√RE 6.74N/√W
• Material Ferrite

Diaphragm

• Effective diameter 258mm
• Effective area SD 523cm²
• Moving mass MMS 109g
• Moving mass (without air load) MMD 101g
• Material Coated Paper

Suspensions

• Stiffness KMS 2.5N/mm
• Compliance CMS 400µm/N
• Equivalent volume to the compliance VAS 152L
• Mechanical resistance RMS 4.69N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 12″
• 314mm
• Overall diameter 314mm
• Baffle cutout diameter 272mm
• Overall depth 130mm
• Volume occupied by the driver (estimated) 2.1L
• Frame material Steel