JENSEN C8R
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The C8R is the little gem in the Jensen Vintage series. It delivers a solid compact tone that defies its size. Extremely versatile, it finds application in small home and student amplifiers; but with a microphone in front, it is capable of transferring on tape some of the biggest tones ever. Not by chance, the vintage Fender® Champ® amplifiers produced with the C8R speaker are treasured by many players as a great studio tool.
General Characteristics for 4Ω
Nominal Overall Diameter207 mm8 in
Nominal Voice Coil Diameter25 mm0.98 in
Magnet Weight270 g10 oz
Overall Weight1 kg2.2 lbs
Flux Density1 T
Voice Coil Winding Depth4 mm0.16 in
Magnetic Gap Depth6 mm0.24 in
Thiele-Small Parameters for 4Ω
Voice Coil DC ResistanceRE3 Ω
Resonance FrequencyƒS131 Hz
Mechanical Q FactorQMS9.65
Electrical Q FactorQES1.67
Total Q FactorQTS1.42
Mechanical Moving MassMMS9.2 g
Mechanical ComplianceCMS161 µm/N
Force FactorBxL3.76 Wb/m
Equivalent Acoustic VolumeVAS10.3 lt.
Maximum Linear DisplacementXMAX± 1 mm
Reference EfficiencynO1.34 %
Diaphragm AreaSD213.8 cm2
Losses Electrical ResistanceRES19 Ω
Voice Coil Inductance @ 1kHzLE0.22 mH
Constructive Characteristics for 4Ω
MagnetFerrite
Voice Coil WindingCopper
Voice Coil FormerKapton
Cone MaterialPaper
Surround MaterialIntegrated Paper
Dust Dome MaterialSolid Paper
Basket MaterialPressed Sheet Steel
Surround TreatmentYes
Electrical Characteristics for 4Ω
Nominal Impedance4 Ω
Rated Power25 W
Musical Power50 W
Sensitivity@1W,1m94.4 dB
General Characteristics for 8Ω
Nominal Overall Diameter207 mm8 in
Nominal Voice Coil Diameter25 mm0.98 in
Magnet Weight270 g10 oz
Overall Weight1 kg2.2 lbs
Flux Density1 T
Voice Coil Winding Depth4 mm0.16 in
Magnetic Gap Depth6 mm0.24 in
Thiele-Small Parameters for 8Ω
Voice Coil DC ResistanceRE6.73 Ω
Resonance FrequencyƒS126 Hz
Mechanical Q FactorQMS10.29
Electrical Q FactorQES2.18
Total Q FactorQTS1.8
Mechanical Moving MassMMS9 g
Mechanical ComplianceCMS176 µm/N
Force FactorBxL4.7 Wb/m
Equivalent Acoustic VolumeVAS11.4 lt.
Maximum Linear DisplacementXMAX± 1 mm
Reference EfficiencynO1.03 %
Diaphragm AreaSD213.8 cm2
Losses Electrical ResistanceRES37 Ω
Voice Coil Inductance @ 1kHzLE0.43 mH
Constructive Characteristics for 8Ω
MagnetFerrite
Voice Coil WindingCopper
Voice Coil FormerKapton
Cone MaterialPaper
Surround MaterialIntegrated Paper
Dust Dome MaterialSolid Paper
Basket MaterialPressed Sheet Steel
Surround TreatmentYes
Electrical Characteristics for 8Ω
Nominal Impedance8 Ω
Rated Power25 W
Musical Power50 W
Sensitivity@1W,1m93 dB
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