Morel PRIMO 804

• Sensitivity (1W, 1m, infinite baffle) SPL1W 85.2dB
• Frequency response 28 - 900Hz

Thiele & Small parameters

• Resonance frequency (free air) fS 45Hz
• Mechanical quality factor QMS 4.44
• Electrical quality factor QES 0.68
• Total quality factor QTS 0.60

Large signal parameters

• Maximum linear excursion xmax 8mm
• Air volume displaced at xmax VD 175cm³
• Power handling P 250W
• Program power Pmax 500W

Voice Coil

• Nominal impedance Z 4Ω
• DC resistance RE 3.2Ω
• Inductance (1kHz) LE 1.14mH
• VC Diameter 51mm
• Winding height HVC 24mm
• Winding material Copper
• Former material Aluminum

Magnet

• Flux density B 0.66T
• Force factor Bl 9.07N/A
• Motor constant Bl/√RE 5.07N/√W
• Air gap height HAG 8mm
• Material High grade ferrite

Diaphragm

• Effective diameter 167mm
• Effective area SD 219cm²
• Moving mass MMS 59g
• Moving mass (without air load) MMD 56.5g
• Material Laminated paper

Suspensions

• Stiffness KMS 5.26N/mm
• Compliance CMS 190µm/N
• Equivalent volume to the compliance VAS 12.6L
• Mechanical resistance RMS 3.96N·s/m

Dimensions

• Nominal diameter 8″
• 223mm
• Overall diameter 223mm
• Baffle cutout diameter 194mm
• Mounting depth 115mm
• Volume occupied by the driver 2L
• Net weight 3.86kg