SB Acoustics SB15CRC30-4

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.6dB

Thiele & Small parameters

• Resonance frequency (free air) fS 37Hz
• Mechanical quality factor QMS 3.39
• Electrical quality factor QES 0.36
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 5.5mm
• Air volume displaced at xmax VD 45cm³
• Power handling P 50W
• Program power Pmax 100W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz) LE 0.12mH
• VC Diameter 30.5mm
• Winding height HVC 16mm
• Winding material Copper Clad Aluminium
• Former material Glass Fiber

Magnet

• Flux density B 1T
• Force factor Bl 4.55N/A
• Motor constant Bl/√RE 2.58N/√W
• Air gap height HAG 5mm
• Weight 0.54kg

Diaphragm

• Effective diameter 102mm
• Effective area SD 82cm²
• Moving mass MMS 10.2g
• Moving mass (without air load) MMD 9.7g
• Material Rohacell®/Carbon fibres sandwich

Suspensions

• Stiffness KMS 0.552N/mm
• Compliance CMS 1810µm/N
• Equivalent volume to the compliance VAS 17.3L
• Mechanical resistance RMS 0.7N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 5″
• 127mm
• Volume occupied by the driver (estimated) 0.59L
• Net weight 1.46kg
• Frame material Cast aluminium