Scan-Speak Discovery 12W/4524G00

• Sensitivity (1W, 1m, infinite baffle) SPL1W 87dB
• Frequency response 50 - 5000Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 50Hz
• Mechanical quality factor QMS 3.35
• Electrical quality factor QES 0.30
• Total quality factor QTS 0.27

Large signal parameters

• Maximum linear excursion xmax 3mm
• Maximum excursion before damage xlim 9mm
• Air volume displaced at xmax VD 18cm³
• Power handling P 40W
• Program power Pmax 70W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.1Ω
• Inductance (1kHz, estimated) LE 0.23mH
• VC Diameter 25mm
• Winding height HVC 10mm

Magnet

• Force factor Bl 4.4N/A
• Motor constant Bl/√RE 2.5N/√W
• Air gap height HAG 4mm

Diaphragm

• Effective diameter 86mm
• Effective area SD 59cm²
• Moving mass MMS 6.1g
• Moving mass (without air load) MMD 5.7g
• Material Coated Fibre Glass

Suspensions

• Stiffness KMS 0.599N/mm
• Compliance CMS 1670µm/N
• Equivalent volume to the compliance VAS 8.2L
• Mechanical resistance RMS 0.57N·s/m
• Surround material SBR Rubber

Dimensions

• Nominal diameter 4.5″
• 120mm
• Volume occupied by the driver 0.12L
• Net weight 1.0kg
• Frame material Die cast Aluminium