Celestion CF0820BMB 8" Mid-bass Speaker - 8 ohm - Open Box

• Balanced airflow venting provides enhanced cooling
• Half-roll elastomer surround
• Nominal diameter : 200mm / 8in
• Power rating : 250W
• Continuous power rating : 500W
• Rated impedance : 8Ω
• Sensitivity : 93dB
• Frequency range : 50-6000Hz
• Chassis type : Cast aluminium
• Magnet type : Ferrite
• Voice coil diameter : 50mm / 2in
• Voice coil material : Copper clad aluminium
• Former material : Glass fibre
• Cone material : Treated paper
• Surround material : Elastomer
• Suspension : Single
• Gap height (Hg) : 8mm / 0.31in
• VC winding height (Hvc) : 18.5mm / 0.73in

Parameters

• Sd : 226.98cm2 / 35.18in2
• Fs : 50.50Hz
• Qms : 5.095
• Qes : 0.394
• Qts : 0.366
• Re : 5.45Ω
• Vas : 22.42l / 0.79ft3
• BI : 11.92Tm
• Cms : 0.31mm/N
• Le (at 1kHz) : 0.78mH
• Xmax : 7.25mm / 0.29in

Mounting Information

• Overall diameter : 215mm / 8.5in
• Overall depth : 108mm / 4.3in
• Cut-out diameter : 187mm / 7.4in
• Mounting hole dimensions : 7x5.6mm / 0.28x0.22in
• Number of mounting holes : 8
• Mounting hole PCD : 197-200mm / 7.8-7.9in
• Power rating : Tested for two hours using a continuous, band-limited pink noise signal as per AES standard. Power calculated on minimum impedance. Loudspeaker tested in free air.
• Continuous power rating : Defined as 3dB greater than the AES rating.
• Sensitivity : Measured on axis at 1W, 1m in 2π anechoic environment.
• Parameters : Measured after unit subjected to pre-conditioning signal.
• Xmax : 0.5(Hvc-Hg) + 0.25Hg