MONACOR SPH-170

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.4dB
• Frequency response 38 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 38Hz
• Mechanical quality factor QMS 2.38
• Electrical quality factor QES 0.55
• Total quality factor QTS 0.44

Large signal parameters

• Maximum linear excursion xmax 3mm
• Air volume displaced at xmax VD 41cm³
• Power handling P 50W
• Program power Pmax 80W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 0.45mH
• VC Diameter 25mm
• Winding material Aluminium

Magnet

• Force factor Bl 5.9N/A
• Motor constant Bl/√RE 2.37N/√W
• Diameter 100mm
• Weight 0.37kg

Diaphragm

• Effective diameter 132mm
• Effective area SD 137cm²
• Moving mass MMS 12.5g
• Moving mass (without air load) MMD 11.2g

Suspensions

• Stiffness KMS 0.699N/mm
• Compliance CMS 1430µm/N
• Equivalent volume to the compliance VAS 37L
• Mechanical resistance RMS 1.25N·s/m

Dimensions

• Nominal diameter 6.75″
• 185mm
• Overall diameter 185mm
• Baffle cutout diameter 150mm
• Overall depth 80mm
• Flange thickness 7mm
• Mounting depth 73mm
• Volume occupied by the driver (estimated) 0.49L
• Net weight 1.3kg