Dayton Audio LS12-44

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.9dB
• Frequency response 28 - 300Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 33.7Hz
• Mechanical quality factor QMS 4.95
• Electrical quality factor QES 0.56
• Total quality factor QTS 0.51

Large signal parameters

• Maximum linear excursion xmax 10mm
• Air volume displaced at xmax VD 547cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 2 x 4Ω
• DC resistance (in series) RE 7.5Ω
• Inductance (1kHz, in series) LE 5.34mH
• VC Diameter 50mm

Magnet

• Force factor (in series) Bl 21.7N/A
• Motor constant Bl/√RE 7.92N/√W
• Material Ferrite

Diaphragm

• Effective diameter 264mm
• Effective area SD 547cm²
• Moving mass MMS 166g
• Moving mass (without air load) MMD 157g
• Material Fiberglass

Suspensions

• Stiffness KMS 7.69N/mm
• Compliance CMS 130µm/N
• Equivalent volume to the compliance VAS 56.6L
• Mechanical resistance RMS 7.1N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 12″
• 315mm
• Overall diameter 315mm
• Baffle cutout diameter 282mm
• Overall depth 99mm
• Volume occupied by the driver (estimated) 1.5L
• Frame material Cast Aluminium