SEAS H1304-08 MCA12RC

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 400 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 68Hz
• Mechanical quality factor QMS 2.42
• Electrical quality factor QES 0.74
• Total quality factor QTS 0.56

Large signal parameters

• Maximum linear excursion xmax 0.9mm
• Air volume displaced at xmax VD 5cm³
• Power handling P 110W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.3Ω
• Inductance (1kHz) LE 0.31mH
• VC Diameter 26mm
• Winding height HVC 5.8mm

Magnet

• Flux density B 1.1T
• Force factor Bl 4.2N/A
• Motor constant Bl/√RE 1.67N/√W
• Air gap height HAG 4mm
• Weight 0.25kg

Diaphragm

• Effective diameter 84mm
• Effective area SD 55cm²
• Moving mass MMS 4.58g
• Moving mass (without air load) MMD 4.3g

Suspensions

• Stiffness KMS 0.833N/mm
• Compliance CMS 1200µm/N
• Equivalent volume to the compliance VAS 5L
• Mechanical resistance RMS 0.85N·s/m

Dimensions

• Nominal diameter 4.5″
• 120mm
• Volume occupied by the driver (estimated) 0.25L
• Net weight 0.66kg