ATOHM LD230CR04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.5dB

Thiele & Small parameters

• Resonance frequency (free air) fS 31.2Hz
• Mechanical quality factor QMS 9.90
• Electrical quality factor QES 0.24
• Total quality factor QTS 0.24

Large signal parameters

• Maximum linear excursion xmax 10mm
• Maximum excursion before damage xlim 18mm
• Air volume displaced at xmax VD 255cm³
• Power handling P 300W
• Program power Pmax 600W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 4.3Ω
• Inductance (1kHz) LE 1.9mH
• VC Diameter 50mm
• Winding height HVC 30mm

Magnet

• Flux density B 1T
• Force factor Bl 16.5N/A
• Motor constant Bl/√RE 7.96N/√W
• Air gap height HAG 8mm

Diaphragm

• Effective diameter 180mm
• Effective area SD 255cm²
• Moving mass MMS 79.4g
• Moving mass (without air load) MMD 76.4g

Suspensions

• Stiffness KMS 3.03N/mm
• Compliance CMS 330µm/N
• Equivalent volume to the compliance VAS 24.4L
• Mechanical resistance RMS 1.57N·s/m

Dimensions

• Nominal diameter 10″
• 230mm
• Volume occupied by the driver (estimated) 1.2L