Micro-Precision Z 170 MK IV

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.4dB

Thiele & Small parameters

• Resonance frequency (free air) fS 47.8Hz
• Mechanical quality factor QMS 9.43
• Electrical quality factor QES 0.87
• Total quality factor QTS 0.79

Large signal parameters

• Power handling P 60W
• Program power Pmax 120W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 4.2Ω
• Inductance (1kHz) LE 0.2mH
• VC Diameter 25mm

Magnet

• Force factor Bl 4.2N/A
• Motor constant Bl/√RE 2.06N/√W

Diaphragm

• Effective diameter 130mm
• Effective area SD 133cm²
• Moving mass MMS 12.3g
• Moving mass (without air load) MMD 11.1g

Suspensions

• Stiffness KMS 1.11N/mm
• Compliance CMS 899µm/N
• Equivalent volume to the compliance VAS 22.5L
• Mechanical resistance RMS 0.39N·s/m

Dimensions

• Nominal diameter 6.5″
• 170mm
• Overall diameter 170mm
• Baffle cutout diameter 145mm
• Overall depth 74mm
• Flange thickness 5mm
• Mounting depth 69mm
• Volume occupied by the driver (estimated) 0.6L
• Net weight 2.1kg