C8R

General Characteristics for 4Ω

Nominal Overall Diameter
207 mm
8 in
Nominal Voice Coil Diameter
25 mm
1 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 for 4Ω

Voice Coil DC Resistance
RE
3 Ω
Resonance Frequency
ƒS
131 Hz
Mechanical Q Factor
QMS
9.65
Electrical Q Factor
QES
1.66
Total Q Factor
QTS
1.42
Mechanical Moving Mass
MMS
9.2 g
Mechanical Compliance
CMS
161 µm/N
Force Factor
BxL
3.76 Wb/m
Equivalent Acoustic Volume
VAS
10.3 lt.
Maximum Linear Displacement
XMAX
± 1 mm
Reference Efficiency
nO
1.34 %
Diaphragm Area
SD
213.8 cm2
Losses Electrical Resistance
RES
19 Ω
Voice Coil Inductance @ 1kHz
LE
0.22 mH

Constructive Characteristics for 4Ω

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 for 4Ω

Nominal Impedance
4 Ω
Rated Power
25 W
Musical Power
50 W
Sensitivity@1W,1m
94.4 dB

General Characteristics for 8Ω

Nominal Overall Diameter
207 mm
8 in
Nominal Voice Coil Diameter
25 mm
1 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 for 8Ω

Voice Coil DC Resistance
RE
6.73 Ω
Resonance Frequency
ƒS
126 Hz
Mechanical Q Factor
QMS
10.29
Electrical Q Factor
QES
2.21
Total Q Factor
QTS
1.8
Mechanical Moving Mass
MMS
9 g
Mechanical Compliance
CMS
176 µm/N
Force Factor
BxL
4.7 Wb/m
Equivalent Acoustic Volume
VAS
11.4 lt.
Maximum Linear Displacement
XMAX
± 1 mm
Reference Efficiency
nO
1.03 %
Diaphragm Area
SD
213.8 cm2
Losses Electrical Resistance
RES
37 Ω
Voice Coil Inductance @ 1kHz
LE
0.43 mH

Constructive Characteristics for 8Ω

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 for 8Ω

Nominal Impedance
8 Ω
Rated Power
25 W
Musical Power
50 W
Sensitivity@1W,1m
93 dB
C8R
8",
25 watts
Ohms

Crystal clear tone with brightly shining highs. It responds to overdrive distortion with a bright fuzz lead voice.

Lows
Tight
Mids
Aggressive
Highs
Bright
Overdrive
Edgy
Guitarist Description
Crystal clear tone with brightly shining highs. Responds to overdrive distortion with a bright fuzz lead voice.
Bassist Description
Bright and hard
Specification Sheet
Product Dimensions
Frequency Response Charts
User Reviews

I used two of these speakers (8 ohm in parallel) in a clone of the Magnatone Melodier 109 that I built. They turned out to be a perfect match for the self-split push-pull circuit. They have a rich sound when played clean, and they handle the output-tube distortion that the amp produces beautifully. Absolutely perfect for blues. And the price is right! My go-to 8" speaker.

Jason Thorpe

Sounded great in a 1973 Bronco I installed it in.

keithb7

I was a little hesitant that this speaker would work for my unique application. I'm not using it for a guitar amp but as a replacement speaker for a 1948 AM/FM/Phono radio that the original 10" speaker was missing. It turns out this speaker works great. I went with the 8" version instead of a bigger one to get a greater frequency range and am glad I did.

This thing rocks even though the tube amp is only putting out 5w.

Chad Beebe

I did purchase a C8R 4ohm speaker to use with my kit amp: The speaker is a good match for this amp and has considerable volume capabilities.

James in Mequon, WI