Peerless NE149W-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.1dB
• Frequency response 100 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 72Hz
• Mechanical quality factor QMS 6.54
• Electrical quality factor QES 0.48
• Total quality factor QTS 0.45

Large signal parameters

• Maximum linear excursion xmax 7mm
• Air volume displaced at xmax VD 60cm³
• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.4Ω
• Inductance (1kHz) LE 0.089mH
• VC Diameter 38.4mm

Magnet

• Force factor Bl 6.09N/A
• Motor constant Bl/√RE 3.3N/√W
• Air gap height HAG 6mm
• Material Neodymium

Diaphragm

• Effective diameter 104mm
• Effective area SD 85cm²
• Moving mass MMS 11.5g
• Moving mass (without air load) MMD 10.9g
• Material Patented PentaCut

Suspensions

• Stiffness KMS 2.38N/mm
• Compliance CMS 420µm/N
• Equivalent volume to the compliance VAS 4.3L
• Mechanical resistance RMS 0.8N·s/m

Dimensions

• Nominal diameter 5″
• 133mm
• Volume occupied by the driver (estimated) 0.28L
• Net weight 0.72kg
• Frame material Cast Aluminium