Aurum Cantus AC-250MK2

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.8dB
• Frequency response 23 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 23Hz
• Mechanical quality factor QMS 3.12
• Electrical quality factor QES 0.49
• Total quality factor QTS 0.42

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 277cm³
• Power handling P 150W
• Program power Pmax 300W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 7.0Ω
• Inductance (1kHz) LE 0.67mH
• VC Diameter 50mm
• Winding height HVC 15mm

Magnet

• Flux density B 1.11T
• Force factor Bl 8.4N/A
• Motor constant Bl/√RE 3.17N/√W
• Diameter 145mm
• Height 20mm

Diaphragm

• Effective diameter 210mm
• Effective area SD 346cm²
• Moving mass MMS 50.5g
• Moving mass (without air load) MMD 45.6g

Suspensions

• Stiffness KMS 0.725N/mm
• Compliance CMS 1380µm/N
• Equivalent volume to the compliance VAS 235L
• Mechanical resistance RMS 2.34N·s/m

Dimensions

• Nominal diameter 10″
• 250mm
• Overall diameter 278mm
• Baffle cutout diameter 235mm
• Overall depth 121mm
• Flange thickness 5mm
• Mounting depth 116mm
• Volume occupied by the driver (estimated) 1.7L
• Net weight 3.92kg
• Frame material Aluminum