Scan-Speak Discovery 30W/4558T00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 86.2dB
• Frequency response 17 - 1500Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 17Hz
• Mechanical quality factor QMS 5.01
• Electrical quality factor QES 0.34
• Total quality factor QTS 0.32

Large signal parameters

• Maximum linear excursion xmax 12.5mm
• Maximum excursion before damage xlim 28mm
• Air volume displaced at xmax VD 583cm³
• Power handling P 150W
• Program power Pmax 350W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 2.6Ω
• Inductance (1kHz, estimated) LE 0.72mH
• VC Diameter 51mm
• Winding height HVC 33mm

Magnet

• Force factor Bl 10.5N/A
• Motor constant Bl/√RE 6.51N/√W
• Air gap height HAG 8mm

Diaphragm

• Effective diameter 244mm
• Effective area SD 466cm²
• Moving mass MMS 135g
• Moving mass (without air load) MMD 128g
• Material Anodized Aluminium

Suspensions

• Stiffness KMS 1.54N/mm
• Compliance CMS 650µm/N
• Equivalent volume to the compliance VAS 197L
• Mechanical resistance RMS 2.88N·s/m

Dimensions

• Nominal diameter 12″
• 300mm
• Volume occupied by the driver 1.5L
• Net weight 6.3kg
• Frame material Die cast Aluminium