Mod 12-50

Mod 12-50

General Characteristics
Nominal Overall Diameter 306 mm 12 in
Nominal Voice Coil Diameter 32 mm 1.26 in
Magnet Weight 426 g 15 oz
Overall Weight 1.84 kg 4.06 lbs
Flux Density 1.1 T
Thiele-Small Parameters
Nominal Impedance 16Ω
Voice Coil DC Resistance RE 6.3 Ω 12.5 Ω
Resonance Frequency ƒS 82 Hz 83 Hz
Mechanical Q Factor QMS 7.5 7.72
Electrical Q Factor QES 2.07
Total Q Factor QTS 1.4 1.63
Mechanical Moving Mass MMS 29.4 g 29.8 g
Mechanical Compliance CMS 129 µm/N 125 µm/N
Force Factor BxL 7.43 Wb/m 9.63 Wb/m
Equivalent Acoustic Volume VAS 43.6 lt. 42.3 lt.
Maximum Linear Displacement XMAX ± 1.5 mm ± 1.5 mm
Reference Efficiency nO 1.33 % 1.1 %
Diaphragm Area SD 490.9 cm2 490.9 cm2
Losses Electrical Resistance RES 28 Ω 46 Ω
Voice Coil Inductance @ 1kHz LE 0.66 mH 1 mH
Constructive Characteristics
Magnet Ferrite
Voice Coil Winding Copper
Voice Coil Former Epotex
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Non-treated Cloth
Basket Material Pressed Sheet Steel
Electrical Characteristics
Nominal Impedance 16Ω
Rated Power 50 W 50 W
Musical Power 100 W 100 W
Sensitivity@1W,1m 94.3 dB 93.5 dB
50 watts
Available in 8Ω, 16Ω

Warm, well balanced tone with low end focus. It responds to overdrive distortion with a rich smooth crunch and bright lead-voice fuzz.

Guitarist Description
Warm, well balanced tone with low end focus. It responds to overdrive distortion with a rich smooth crunch and bright lead-voice fuzz.
Bassist Description
Smooth and thick
Sound Samples
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Specification Sheet
Product Dimensions
Note: all dimensions are in mm.
User Reviews

I just want to say that the pair of 12" MODS I bought and installed in an older Kustom cabinet sound fantastic. I have used many Jensen products over the years and they have always been my first choice. The reason is simply - they are the best. In my opinion anyhow. I have never been dissapointed with any Jensen speaker I have ever had. You can hand them a hefty beating and they hold up well. They will remain my first choice.

William in Benton, KY

I purchased two Mod 12-50 's, one Mod 10-35 , and one C10R . I have them in a birch, slant back cab with the two 12" diagonal to one another and the two 10" diagonal to each other . I love the dynamics of this combination of speakers when playing through a tube amp head. I think it sounds better with the EL-84 head than with the 6V6 head.

Scott in Syracuse, NY

I've used the Mods. Love the 12 incher. Hope to be able to use more in the future.


Great speakers. Liked them so much I picked up a C12N, P12Q and MOD 12-50 to re-do three respective new amps to give them a more vintage tone.

Brian in Greenwood, IN