SB Acoustics SB29NRX75-8

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87.7dB

Thiele & Small parameters

• Resonance frequency (free air) fS 26Hz
• Mechanical quality factor QMS 7.06
• Electrical quality factor QES 0.39
• Total quality factor QTS 0.37

Large signal parameters

• Maximum linear excursion xmax 11mm
• Air volume displaced at xmax VD 343cm³
• Power handling P 200W
• Program power Pmax 400W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 2.3mH
• VC Diameter 75.6mm
• Winding height HVC 28mm
• Winding material Copper
• Former material Glass Fiber

Magnet

• Flux density B 0.9T
• Force factor Bl 12.4N/A
• Motor constant Bl/√RE 4.98N/√W
• Air gap height HAG 6mm
• Weight 2.1kg

Diaphragm

• Effective diameter 199mm
• Effective area SD 312cm²
• Moving mass MMS 58.9g
• Moving mass (without air load) MMD 54.8g
• Material Norex

Suspensions

• Stiffness KMS 1.59N/mm
• Compliance CMS 630µm/N
• Equivalent volume to the compliance VAS 85.6L
• Mechanical resistance RMS 1.4N·s/m
• Surround material Rubber

Dimensions

• Nominal diameter 10″
• 254mm
• Volume occupied by the driver (estimated) 2.4L
• Net weight 5.4kg
• Frame material Cast aluminium