Morel Ultimate UW 958

• Sensitivity (1W, 1m, infinite baffle) SPL1W 84.9dB

Thiele & Small parameters

• Resonance frequency (free air) fS 28Hz
• Mechanical quality factor QMS 1.61
• Electrical quality factor QES 0.45
• Total quality factor QTS 0.35

Large signal parameters

• Maximum linear excursion xmax 11.5mm
• Air volume displaced at xmax VD 280cm³
• Power handling P 500W
• Program power Pmax 1000W

Voice Coil

• Nominal impedance Z 8Ω
• DC resistance RE 6.2Ω
• Inductance (1kHz) LE 1.32mH
• VC Diameter 130mm
• Winding height HVC 35mm
• Winding material Hexatech™ Aluminum
• Former material Aluminum

Magnet

• Flux density B 0.64T
• Force factor Bl 13N/A
• Motor constant Bl/√RE 5.22N/√W
• Air gap height HAG 12mm
• Material High flux double ferrite vented

Diaphragm

• Effective diameter 176mm
• Effective area SD 243cm²
• Moving mass MMS 65.5g
• Moving mass (without air load) MMD 62.7g
• Material Composite cellular fiber

Suspensions

• Stiffness KMS 2.13N/mm
• Compliance CMS 470µm/N
• Equivalent volume to the compliance VAS 39.5L
• Mechanical resistance RMS 7.37N·s/m

Dimensions

• Nominal diameter 8″
• 222mm
• Overall diameter 222mm
• Baffle cutout diameter 200mm
• Overall depth 125mm
• Flange thickness 5mm
• Mounting depth 120mm
• Volume occupied by the driver (estimated) 1.9L
• Net weight 5.95kg