Peerless NE123W-08

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.1dB
• Frequency response 100 - 8000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 73Hz
• Mechanical quality factor QMS 9.37
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.46

Large signal parameters

• Maximum linear excursion xmax 4.4mm
• Air volume displaced at xmax VD 24cm³
• Power handling P 45W
• Program power Pmax 90W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.1Ω
• Inductance (1kHz) LE 0.118mH
• VC Diameter 32.4mm

Magnet

• Force factor Bl 5.83N/A
• Motor constant Bl/√RE 2.36N/√W
• Air gap height HAG 4mm
• Material Neodymium

Diaphragm

• Effective diameter 83mm
• Effective area SD 54.1cm²
• Moving mass MMS 5.91g
• Moving mass (without air load) MMD 5.6g
• Material Patented PentaCut

Suspensions

• Stiffness KMS 1.25N/mm
• Compliance CMS 800µm/N
• Equivalent volume to the compliance VAS 3.3L
• Mechanical resistance RMS 0.29N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.15L
• Net weight 0.41kg
• Frame material Cast Aluminium