RCF M15P550

• Sensitivity (1W, 1m, infinite baffle) SPL1W 98.1dB
• Frequency response 40 - 3000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 4.00
• Electrical quality factor QES 0.41
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 7mm
• Maximum excursion before damage xlim 18mm
• Air volume displaced at xmax VD 595cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 5.3Ω
• Inductance (1kHz) LE 0.57mH
• VC Diameter 76mm
• Winding height HVC 17mm
• Winding material Edgewound aluminium

Magnet

• Force factor Bl 19.8N/A
• Motor constant Bl/√RE 8.6N/√W
• Air gap height HAG 10mm

Diaphragm

• Effective diameter 330mm
• Effective area SD 850cm²
• Moving mass MMS 89g
• Moving mass (without air load) MMD 71.7g

Suspensions

• Stiffness KMS 8.55N/mm
• Compliance CMS 117µm/N
• Equivalent volume to the compliance VAS 140L
• Mechanical resistance RMS 6.29N·s/m
• Spider material with silicon damping

Dimensions

• Nominal diameter 15″
• 381mm
• Overall diameter 387mm
• Baffle cutout diameter 360mm
• Overall depth 165mm
• Volume occupied by the driver 3.8L
• Net weight 8.7kg