Peerless HDS-P830870

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 100 - 4000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 100Hz
• Mechanical quality factor QMS 1.92
• Electrical quality factor QES 0.87
• Total quality factor QTS 0.60

Large signal parameters

• Maximum linear excursion xmax 5mm
• Air volume displaced at xmax VD 28cm³
• Power handling P 25W
• Program power Pmax 50W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.198mH
• VC Diameter 25.7mm

Magnet

• Force factor Bl 4.93N/A
• Motor constant Bl/√RE 2.14N/√W
• Air gap height HAG 6mm
• Material Ferrite

Diaphragm

• Effective diameter 85mm
• Effective area SD 56.8cm²
• Moving mass MMS 6.08g
• Moving mass (without air load) MMD 5.8g
• Material Polypropylene

Suspensions

• Stiffness KMS 2.63N/mm
• Compliance CMS 380µm/N
• Equivalent volume to the compliance VAS 1.73L
• Mechanical resistance RMS 1.99N·s/m

Dimensions

• Nominal diameter 4″
• 102mm
• Volume occupied by the driver (estimated) 0.36L
• Net weight 0.92kg
• Frame material Cast Aluminium