Peerless FSL-1830R09-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 92.4dB
• Frequency response 40 - 400Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 29Hz
• Mechanical quality factor QMS 15.10
• Electrical quality factor QES 0.50
• Total quality factor QTS 0.49

Large signal parameters

• Maximum linear excursion xmax 15.3mm
• Air volume displaced at xmax VD 1729cm³
• Power handling P 700W
• Program power Pmax 1400W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.999mH
• VC Diameter 75.7mm

Magnet

• Force factor Bl 16.6N/A
• Motor constant Bl/√RE 8.87N/√W
• Air gap height HAG 10mm
• Material Ferrite

Diaphragm

• Effective diameter 379mm
• Effective area SD 1130cm²
• Moving mass MMS 214g
• Moving mass (without air load) MMD 187g

Suspensions

• Stiffness KMS 7.14N/mm
• Compliance CMS 140µm/N
• Equivalent volume to the compliance VAS 250L
• Mechanical resistance RMS 2.58N·s/m

Dimensions

• Nominal diameter 18″
• 457mm
• Volume occupied by the driver (estimated) 5.5L
• Net weight 12.1kg