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 | |
| Electrical Characteristics |
4Ω
|
8Ω
|
||
|---|---|---|---|---|
| Nominal Impedance | 4 | 8 | Ω | |
| Rated Power | 25 | 25 | W | |
| Musical Power | 50 | 50 | W | |
| Sensitivity@1W,1m | 94.4 | 93 | dB | |
Product Dimensions
