Peerless STW-350F188PR01-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 83.8dB
• Frequency response 20 - 200Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 31Hz
• Mechanical quality factor QMS 13.70
• Electrical quality factor QES 0.74
• Total quality factor QTS 0.70

Large signal parameters

• Maximum linear excursion xmax 22.4mm
• Air volume displaced at xmax VD 1736cm³
• Power handling P 2500W
• Program power Pmax 5000W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 2.82mH
• VC Diameter 188mm

Magnet

• Force factor Bl 24.3N/A
• Motor constant Bl/√RE 13.8N/√W
• Air gap height HAG 36mm
• Material Ferrite

Diaphragm

• Effective diameter 314mm
• Effective area SD 775cm²
• Moving mass MMS 738g
• Moving mass (without air load) MMD 723g
• Material Paper

Suspensions

• Stiffness KMS 27.8N/mm
• Compliance CMS 36µm/N
• Equivalent volume to the compliance VAS 30.6L
• Mechanical resistance RMS 10.5N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 15″
• 381mm
• Volume occupied by the driver (estimated) 13L
• Net weight 26.3kg
• Frame material Cast Aluminium