Specification Sheet - C8R
8" - 25 W Vintage Ceramic Loudspeaker
General Characteristics | ||
---|---|---|
Nominal Overall Diameter | 207 mm | 8 in |
Nominal Voice Coil Diameter | 25 mm | 0.98 in |
Magnet Weight | 270 g | 10 oz |
Overall Weight | 1 kg | 2.2 lbs |
Flux Density | 1 T | |
Voice Coil Winding Depth | 4 mm | 0.16 in |
Magnetic Gap Depth | 6 mm | 0.24 in |
Thiele-Small Parameters |
4Ω
|
8Ω
|
||
---|---|---|---|---|
Voice Coil DC Resistance | RE | 3 | 6.73 | Ω |
Resonance Frequency | ƒS | 131 | 126 | Hz |
Mechanical Q Factor | QMS | 9.65 | 10.29 | |
Total Q Factor | QTS | 1.42 | 1.8 | |
Mechanical Moving Mass | MMS | 9.2 | 9 | g |
Mechanical Compliance | CMS | 161 | 176 | µm/N |
Force Factor | BxL | 3.76 | 4.7 | Wb/m |
Equivalent Acoustic Volume | VAS | 10.3 | 11.4 | lt. |
Maximum Linear Displacement | XMAX | ±1 | ±1 | mm |
Reference Efficiency | nO | 1.34 | 1.03 | % |
Diaphragm Area | SD | 213.8 | 213.8 | cm2 |
Losses Electrical Resistance | RES | 19 | 37 | Ω |
Voice Coil Inductance @ 1kHz | LE | 0.22 | 0.43 | mH |
Electrical Q Factor | QES | 1.67 | 2.18 |
Constructive Characteristics | ||
---|---|---|
Magnet | Ferrite | |
Voice Coil Winding | Copper | |
Voice Coil Former | Kapton | |
Cone Material | Paper | |
Surround Material | Integrated Paper | |
Dust Dome Material | Solid Paper | |
Basket Material | Pressed Sheet Steel | |
Surround Treatment | Yes |