Peerless PMT-40N25AL01-04

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.7dB
• Frequency response 100 - 20000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 235Hz
• Mechanical quality factor QMS 2.21
• Electrical quality factor QES 0.61
• Total quality factor QTS 0.48

Large signal parameters

• Maximum linear excursion xmax 1.9mm
• Air volume displaced at xmax VD 1.6cm³
• Power handling P 5W
• Program power Pmax 10W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.7Ω
• Inductance (1kHz) LE 0.08mH
• VC Diameter 25.5mm
• Former material Kapton

Magnet

• Force factor Bl 3N/A
• Motor constant Bl/√RE 1.57N/√W
• Air gap height HAG 2mm

Diaphragm

• Effective diameter 33mm
• Effective area SD 8.5cm²
• Moving mass MMS 1g
• Moving mass (without air load) MMD 1g

Suspensions

• Stiffness KMS 2.19N/mm
• Compliance CMS 457µm/N
• Equivalent volume to the compliance VAS 0.05L
• Mechanical resistance RMS 0.67N·s/m

Dimensions

• Nominal diameter 1.5″
• 40mm
• Net weight 0.07kg