Dayton Audio Signature SIG270-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 89.3dB
• Frequency response 35 - 2500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 35Hz
• Mechanical quality factor QMS 10.25
• Electrical quality factor QES 0.44
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 6.5mm
• Air volume displaced at xmax VD 235cm³
• Power handling P 120W
• Program power Pmax 240W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.9Ω
• Inductance (1kHz) LE 0.79mH
• VC Diameter 51mm
• Winding material Copper
• Former material Glass fiber

Magnet

• Force factor Bl 11.2N/A
• Motor constant Bl/√RE 5.67N/√W
• Material Ferrite

Diaphragm

• Effective diameter 215mm
• Effective area SD 362cm²
• Moving mass MMS 64g
• Moving mass (without air load) MMD 58.9g
• Material Aluminum

Suspensions

• Stiffness KMS 3.13N/mm
• Compliance CMS 320µm/N
• Equivalent volume to the compliance VAS 58.6L
• Mechanical resistance RMS 1.37N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 270mm
• Overall diameter 270mm
• Baffle cutout diameter 239mm
• Overall depth 118mm
• Volume occupied by the driver (estimated) 1.5L
• Frame material Cast Aluminium