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Speaker - Jensen® Vintage Ceramic, 8", C8R, 25W
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.
Guitarist Description: Crystal clear tone with brightly shining highs. Responds to overdrive distortion with a bright fuzz lead voice.
- Lows: Tight
- Mids: Aggressive
- Highs: Bright
- Overdrive: Edgy
For more information about our Jensen® speakers, see our tech corner article on Jensen Speakers.
SKU:
P-A-C8R
Item ID:
001925
Brand:
JensenJensen VintageCeramic
Magnet Type:
Size:
Type:
RoHS Compliant
| Impedance | Our Part Number | UPC/EAN | Jensen Part Number |
|---|---|---|---|
| 4 Ω | P-A-C8R-4 | 8034028640049 | ZJ04030 |
| 8 Ω | P-A-C8R-8 | 8034028640032 | ZJ04020 |
| Basket Material | Pressed Sheet Steel | ||
| Cone Material | Paper | ||
| Depth | 3.0629 in. | ||
| Diameter | 8 in. | ||
| Diaphragm Area (SD) | 213.80 cm2 | ||
| Dust Dome Material | Solid Paper | ||
| Equivalent Acoustic Volume (VAS) | 4 Ω version | P-A-C8R-4 | 10.30 liters |
| 8 Ω version | P-A-C8R-8 | 11.40 liters | |
| Flux Density | 1.00 T | ||
| Force Factor (BxL) | 4 Ω version | P-A-C8R-4 | 3.76 Wb/m |
| 8 Ω version | P-A-C8R-8 | 4.70 Wb/m | |
| Inner Diameter | 7.0275 in. | ||
| Linear Displacement, maximum (XMAX) | 1.00 mm | ||
| Losses Electrical Resistance (RES) | 4 Ω version | P-A-C8R-4 | 19.00 Ω |
| 8 Ω version | P-A-C8R-8 | 37.00 Ω | |
| Magnet Assembly Depth | 0.8976 in. | ||
| Magnet Assembly Diameter | 3.3858 in. | ||
| Magnet Type | Ferrite | ||
| Magnetic Gap Depth | 6.00 mm | ||
| Mechanical Compliance (CMS) | 4 Ω version | P-A-C8R-4 | 161.00 µm/N |
| 8 Ω version | P-A-C8R-8 | 176.00 µm/N | |
| Mechanical Moving Mass (MMS) | 4 Ω version | P-A-C8R-4 | 9.20 g |
| 8 Ω version | P-A-C8R-8 | 9.00 g | |
| Mechanical Q Factor (QMS) | 4 Ω version | P-A-C8R-4 | 9.65 |
| 8 Ω version | P-A-C8R-8 | 10.29 | |
| Mounting Hole Bolt Circle Diameter | 7.7559 in. | ||
| Mounting Hole Diameter | 0.1968 in. | ||
| Musical Power | 50.00 W | ||
| Nominal Overall Diameter | 207.00 mm | ||
| Nominal Voice Coil Diameter | 25.00 mm | ||
| Outer Diameter | 8.1496 in. | ||
| Rated Power | 25.00 W | ||
| Reference Efficiency (nO) | 4 Ω version | P-A-C8R-4 | 1.34 % |
| 8 Ω version | P-A-C8R-8 | 1.03 % | |
| Resonance Frequency (ƒS) | 4 Ω version | P-A-C8R-4 | 131.00 Hz |
| 8 Ω version | P-A-C8R-8 | 126.00 Hz | |
| Sensitivity @ 1W, 1m | 4 Ω version | P-A-C8R-4 | 94.40 dB |
| 8 Ω version | P-A-C8R-8 | 93.00 dB | |
| Surround Material | Integrated Paper | ||
| Surround Treatment | Yes | ||
| Total Q Factor (QTS) | 4 Ω version | P-A-C8R-4 | 1.42 |
| 8 Ω version | P-A-C8R-8 | 1.80 | |
| Voice Coil DC Resistance (Re) | 4 Ω version | P-A-C8R-4 | 3.00 Ω |
| 8 Ω version | P-A-C8R-8 | 6.73 Ω | |
| Voice Coil Diameter | 1 in. | ||
| Voice Coil Former | Kapton | ||
| Voice Coil Inductance @ 1 kHZ (LE) | 4 Ω version | P-A-C8R-4 | 0.22 mH |
| 8 Ω version | P-A-C8R-8 | 0.43 mH | |
| Voice Coil Winding Depth | 4.00 mm | ||
| Voice Coil Winding Type | Copper |
| Packaging Dimensions | 9.1 in. × 9.1 in. × 5.55 in. | |
| Weight (Packaging) | 2.6 lbs. |
| P-A-C8R-4 - 4 Ω version | Basket Material | Pressed Sheet Steel |
| Cone Material | Paper | |
| Depth | 3.0629 in. | |
| Diameter | 8 in. | |
| Diaphragm Area (SD) | 213.80 cm2 | |
| Dust Dome Material | Solid Paper | |
| Equivalent Acoustic Volume (VAS) | 10.30 liters | |
| Flux Density | 1.00 T | |
| Force Factor (BxL) | 3.76 Wb/m | |
| Inner Diameter | 7.0275 in. | |
| Linear Displacement, maximum (XMAX) | 1.00 mm | |
| Losses Electrical Resistance (RES) | 19.00 Ω | |
| Magnet Assembly Depth | 0.8976 in. | |
| Magnet Assembly Diameter | 3.3858 in. | |
| Magnet Type | Ferrite | |
| Magnetic Gap Depth | 6.00 mm | |
| Mechanical Compliance (CMS) | 161.00 µm/N | |
| Mechanical Moving Mass (MMS) | 9.20 g | |
| Mechanical Q Factor (QMS) | 9.65 | |
| Mounting Hole Bolt Circle Diameter | 7.7559 in. | |
| Mounting Hole Diameter | 0.1968 in. | |
| Musical Power | 50.00 W | |
| Nominal Overall Diameter | 207.00 mm | |
| Nominal Voice Coil Diameter | 25.00 mm | |
| Outer Diameter | 8.1496 in. | |
| Rated Power | 25.00 W | |
| Reference Efficiency (nO) | 1.34 % | |
| Resonance Frequency (ƒS) | 131.00 Hz | |
| Sensitivity @ 1W, 1m | 94.40 dB | |
| Surround Material | Integrated Paper | |
| Surround Treatment | Yes | |
| Total Q Factor (QTS) | 1.42 | |
| Voice Coil DC Resistance (Re) | 3.00 Ω | |
| Voice Coil Diameter | 1 in. | |
| Voice Coil Former | Kapton | |
| Voice Coil Inductance @ 1 kHZ (LE) | 0.22 mH | |
| Voice Coil Winding Depth | 4.00 mm | |
| Voice Coil Winding Type | Copper | |
| P-A-C8R-8 - 8 Ω version | Basket Material | Pressed Sheet Steel |
| Cone Material | Paper | |
| Depth | 3.0629 in. | |
| Diameter | 8 in. | |
| Diaphragm Area (SD) | 213.80 cm2 | |
| Dust Dome Material | Solid Paper | |
| Equivalent Acoustic Volume (VAS) | 11.40 liters | |
| Flux Density | 1.00 T | |
| Force Factor (BxL) | 4.70 Wb/m | |
| Inner Diameter | 7.0275 in. | |
| Linear Displacement, maximum (XMAX) | 1.00 mm | |
| Losses Electrical Resistance (RES) | 37.00 Ω | |
| Magnet Assembly Depth | 0.8976 in. | |
| Magnet Assembly Diameter | 3.3858 in. | |
| Magnet Type | Ferrite | |
| Magnetic Gap Depth | 6.00 mm | |
| Mechanical Compliance (CMS) | 176.00 µm/N | |
| Mechanical Moving Mass (MMS) | 9.00 g | |
| Mechanical Q Factor (QMS) | 10.29 | |
| Mounting Hole Bolt Circle Diameter | 7.7559 in. | |
| Mounting Hole Diameter | 0.1968 in. | |
| Musical Power | 50.00 W | |
| Nominal Overall Diameter | 207.00 mm | |
| Nominal Voice Coil Diameter | 25.00 mm | |
| Outer Diameter | 8.1496 in. | |
| Rated Power | 25.00 W | |
| Reference Efficiency (nO) | 1.03 % | |
| Resonance Frequency (ƒS) | 126.00 Hz | |
| Sensitivity @ 1W, 1m | 93.00 dB | |
| Surround Material | Integrated Paper | |
| Surround Treatment | Yes | |
| Total Q Factor (QTS) | 1.80 | |
| Voice Coil DC Resistance (Re) | 6.73 Ω | |
| Voice Coil Diameter | 1 in. | |
| Voice Coil Former | Kapton | |
| Voice Coil Inductance @ 1 kHZ (LE) | 0.43 mH | |
| Voice Coil Winding Depth | 4.00 mm | |
| Voice Coil Winding Type | Copper |
 Specification Sheet | All Models |
 Blues Sound Sample | All Models |
| Clean Sound Sample | All Models |
| Country Sound Sample | All Models |
| Jazz Sound Sample | All Models |
| Metal Sound Sample | All Models |
| Overdriven Sound Sample | All Models |
| Rock Sound Sample | All Models |
 Terminal Dimensions | All Models |
My Project Lists
Specifications, Files, and Documents
Sound Samples:
Blues Sound Sample00:49https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_blues.mp3
Clean Sound Sample00:18https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_clean.mp3
Country Sound Sample00:35https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_country.mp3
Jazz Sound Sample00:43https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_jazz.mp3
Metal Sound Sample00:53https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_metal.mp3
Overdriven Sound Sample00:18https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_overdriven.mp3
Rock Sound Sample00:41https://www.amplifiedparts.com/sites/default/files/associated_files/c8r_rock.mp3
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Terminal Dimensions Questions and Answers
Click each question to see its answers.
2 answers
Can i use this to repair an ampeg BA108?
Asked by Anonymous on August 27th, 2015.
August 27th, 2015
Staff Member
The Jensen C8R is not a bass speaker and the results, if used for bass, would not be suitable.
If the required impedance is 8 ohms, go with the Jensen Punch 8". Otherwise, Contact Ampeg about a replacement.
1 answers
25 watt rms o peak power?
Asked by Anonymous on August 27th, 2015.
August 27th, 2015
Staff Member
Rated power 25 watts. Musical power 50 watts. See the specification sheet for more information
1 answers
I have a Roland Street Cube EX and am looking for a 25 watt - 8" - 4 ohm speaker (to replace stock speakers - same specs) that has a good bass response to play electric bass through. I can get an O.K. tone now but am looking to improve the bass response.
What would you suggest? Would a 20 watt Eminence Patriot 8" Lead/Rhythm Guitar Speaker Blue/Red Star, Stripes work (reviews say it has good bass response)even though wattage is wrong or is that a bad idea? Thanks in advance for your help.
Asked by Anonymous on April 19th, 2017.
We do not recommend this Jensen speaker for bass. If you want to run bass and guitar out of one amp a PA speaker is a good choice. Please email us directly at: [email protected] for more information.
1 answers
Where is this speaker made? What is the country of origin? Thank you.
Asked by Anonymous on September 6th, 2017.
These speakers are made in Italy.
1 answers
Hi, I just got Ampeg G18. I need to replace speaker but there is no info 4 or 8ohm. which one should I buy it. thank you Koji
Asked by Anonymous on April 8th, 2018.
Please see our video on finding a speakers impedance: https://www.youtube.com/watch?v=4Ocgo1p8Z3Y
1 answers
Would this work with a vintage record player?
Asked by Anonymous on January 28th, 2019.
January 31st, 2019
Staff Member
It is possible it would work, but with these speakers being voiced for guitar amplifiers, it may not produce the ideal sound.
1 answers
I'm building a small guitar cabinet to go with my guitar line (pipedreamfretworks.com). Thinking of trying something a little different: a Jensen C6V matched with a Jensen C8R. I know a lot about wood, don't know jack about electronics. I need a lotta help. My question:
The spec sheets have a wattage for "rated power"—I know what that is—and another for "musical power" —no idea. What is that? The C6V for example has a rated power of 20watts but a "musical" power of 40.
I've read the rule of thumb is, when using two speakers, wired in series you double the speaker with the lowest wattage and that's what your cab can handle. So in this case, the C6V at 20 watts doubled, I have a 40 watt cab.
But then there's this this "musical power" number. So would I have an 80 watt cabinet?
Sorry, I'm pretty remedial. Need some hand holding. Thanks
Asked by Anonymous on December 5th, 2022.
December 5th, 2022
Staff Member
The rated power should be used for determining the wattage rating of a cab. The "musical power" rating is a peak rating.
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Just placed this Jensen C8R in a 1959 Supro "Super"1606, replacing the original Rola. I wanted to keep the Rola safe for the future.
The C8R is a great choice for this 5 watt gem. I suggest this is one of the most suitable and cost effective speaker choices for this type of amp (Champ style).
There is a beautiful natural and warm break up. Delighted with the purchase! So much fun to play with this amp now. Thanks Amplified Parts!
Big improvement in tone for my 1980 SFVC. The speaker is better than the original and just popped right - no mods required. Highly recommend.
popped this into my 65 champ. PERFECT. exactly what i've been looking for tonewise. it just keeps getting better and better.