Peerless PMT-30N18AL04-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 77.6dB
• Frequency response 210 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 210Hz
• Mechanical quality factor QMS 1.44
• Electrical quality factor QES 0.76
• Total quality factor QTS 0.50

Large signal parameters

• Maximum linear excursion xmax 1.6mm
• Air volume displaced at xmax VD 0.8cm³
• Power handling P 2W
• Program power Pmax 4W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.5Ω
• Inductance (1kHz) LE 0.077mH
• VC Diameter 18mm

Magnet

• Force factor Bl 1.9N/A
• Motor constant Bl/√RE 1.02N/√W
• Air gap height HAG 1.5mm
• Material Neodymium

Diaphragm

• Effective diameter 25mm
• Effective area SD 4.9cm²
• Moving mass MMS 0.582g
• Moving mass (without air load) MMD 0.6g
• Material Aluminum

Suspensions

• Stiffness KMS 1.02N/mm
• Compliance CMS 980µm/N
• Equivalent volume to the compliance VAS 0.033L
• Mechanical resistance RMS 0.53N·s/m
• Surround material Foam

Dimensions

• Nominal diameter 1.2″
• 30mm
• Net weight 0.025kg