Dayton Audio HARB252-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 81.2dB
• Frequency response 150 - 17000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 172Hz
• Mechanical quality factor QMS 4.23
• Electrical quality factor QES 2.98
• Total quality factor QTS 1.74

Large signal parameters

• Maximum linear excursion xmax 1.3mm
• Air volume displaced at xmax VD 2.8cm³
• Power handling P 10W
• Program power Pmax 20W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.2Ω
• Inductance (1kHz) LE 0.09mH

Magnet

• Force factor Bl 3.04N/A
• Motor constant Bl/√RE 1.13N/√W

Diaphragm

• Effective diameter 52mm
• Effective area SD 21.2cm²
• Moving mass MMS 3.2g
• Moving mass (without air load) MMD 3.1g

Suspensions

• Stiffness KMS 3.33N/mm
• Compliance CMS 300µm/N
• Equivalent volume to the compliance VAS 0.19L
• Mechanical resistance RMS 0.82N·s/m

Dimensions

• Nominal size 1 x 5″
• 131mm
• Overall diameter 131mm
• Baffle cutout diameter 21mm
• Overall depth 29mm
• Volume occupied by the driver (estimated) 0.28L