Mod 12-70

Mod 12-70

General Characteristics for 4Ω

Nominal Overall Diameter
306 mm
12 in
Nominal Voice Coil Diameter
38 mm
1.5 in
Magnet Weight
640 g
23 oz
Overall Weight
2.4 kg
5.29 lbs
Flux Density
1.16 T

Thiele-Small Parameters for 4Ω

Voice Coil DC Resistance
RE
3.53 Ω
Resonance Frequency
ƒS
74 Hz
Mechanical Q Factor
QMS
14.63
Electrical Q Factor
QES
0.96
Total Q Factor
QTS
0.9
Mechanical Moving Mass
MMS
30.6 g
Mechanical Compliance
CMS
151 µm/N
Force Factor
BxL
7.23 Wb/m
Equivalent Acoustic Volume
VAS
51.7 lt.
Maximum Linear Displacement
XMAX
± 1.5 mm
Reference Efficiency
nO
2.1 %
Diaphragm Area
SD
490.9 cm2
Losses Electrical Resistance
RES
51 Ω
Voice Coil Inductance @ 1kHz
LE
0.43 mH

Constructive Characteristics for 4Ω

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 for 4Ω

Nominal Impedance
4 Ω
Rated Power
70 W
Musical Power
140 W
Sensitivity@1W,1m
96 dB

General Characteristics for 8Ω

Nominal Overall Diameter
306 mm
12 in
Nominal Voice Coil Diameter
38 mm
1.5 in
Magnet Weight
640 g
23 oz
Overall Weight
2.4 kg
5.29 lbs
Flux Density
1.16 T

Thiele-Small Parameters for 8Ω

Voice Coil DC Resistance
RE
5 Ω
Resonance Frequency
ƒS
78 Hz
Mechanical Q Factor
QMS
13.77
Electrical Q Factor
QES
0.95
Total Q Factor
QTS
0.89
Mechanical Moving Mass
MMS
29.6 g
Mechanical Compliance
CMS
141 µm/N
Force Factor
BxL
8.28 Wb/m
Equivalent Acoustic Volume
VAS
48.1 lt.
Maximum Linear Displacement
XMAX
± 1.5 mm
Reference Efficiency
nO
2.09 %
Diaphragm Area
SD
490.9 cm2
Losses Electrical Resistance
RES
67.7 Ω
Voice Coil Inductance @ 1kHz
LE
0.58 mH

Constructive Characteristics for 8Ω

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 for 8Ω

Nominal Impedance
8 Ω
Rated Power
70 W
Musical Power
140 W
Sensitivity@1W,1m
97.5 dB

General Characteristics for 16Ω

Nominal Overall Diameter
306 mm
12 in
Nominal Voice Coil Diameter
38 mm
1.5 in
Magnet Weight
640 g
23 oz
Overall Weight
2.4 kg
5.29 lbs
Flux Density
1.16 T

Thiele-Small Parameters for 16Ω

Voice Coil DC Resistance
RE
12 Ω
Resonance Frequency
ƒS
83 Hz
Mechanical Q Factor
QMS
7.84
Electrical Q Factor
QES
1.20
Total Q Factor
QTS
1.04
Mechanical Moving Mass
MMS
30.3 g
Mechanical Compliance
CMS
125 µm/N
Force Factor
BxL
12.56 Wb/m
Equivalent Acoustic Volume
VAS
42.4 lt.
Maximum Linear Displacement
XMAX
± 1.5 mm
Reference Efficiency
nO
1.88 %
Diaphragm Area
SD
490.9 cm2
Losses Electrical Resistance
RES
80 Ω
Voice Coil Inductance @ 1kHz
LE
1 mH

Constructive Characteristics for 16Ω

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 for 16Ω

Nominal Impedance
16 Ω
Rated Power
70 W
Musical Power
140 W
Sensitivity@1W,1m
96 dB
MOD12-70
12",
70 watts

The MOD12-70 is loud, dynamic, and well defined. It has a defined warm crunch response to overdrive distortion.

Lows
Tight
Mids
Subdued
Highs
Bright
Overdrive
Edgy
Guitarist Description
Loud, dynamic, and well defined. Has a defined warm crunch response to overdrive distortion
Bassist Description
Straightforward, bottom-heavy punch
Sound Samples
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Having trouble playing our sound samples? Access the files directly.
Specification Sheet
Product Dimensions
Note: all dimensions are in mm.
User Reviews

The stock CTS ceramic speakers on my 1980 LAB Series L5 were far from bad, but a little lacking in high end and with a little too much lower midrange for my taste. According to reviews and its frequency response chart, the MOD 12-70 would theoretically cure these slight shortcomings. Indeed, it worked! This amplifier is now everything I've wanted. My main guitar is a stock CS Jazzmaster with heavy flatwounds, and I mostly play with a clean or lightly distorted sound (a DOD 250 gray clone and a Fulltone OCD are my main sources of dirt, with the occasional use of a Turbo RAT), but on some songs I use flat-out fuzz (Zvex Fuzz factory and a Superfuzz clone). I also use a lot of complex rhythmic delay (emulating early tape delays like the Meazzi), which tended to confuse things a bit with the old speakers. But with the Jensens, every single sound I use is articulate and well-defined. This might not be the best choice for blues players, but these speakers work well for pretty much everything else, in my opinion. I have not tried (and will not try) mid-scooped metal sounds on them, but I'm pretty sure they'll handle that too, as they seem to have a very controlled and tight low end.

Sindre

Totally awesome Speakers. Very transparent. Allows the amp to shine uncolored. 

Guitarman59

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've been playing guitar for nearly 50 years and designing and building speakers systems for musicians for more then 40 years. I bought a new Trace Elliot Bass amp a few years back that had a Jensen MOD12-70. It ended up in my Fender Deluxe, exactly the sound I've been searching for for years. Now I've got another MOD12-70 and P12Q, they make all other speakers sound muddy (no not Mr. Waters). All my amps are being changed to Jensen. If it ain't broke don't fix it.

Reinhard in Gehrden, Germany

I installed a Mod 12-70 in my Lab L3 and i was immediately knocked out by the sound - the low end was tighter and the mids were more complex. Clean or distorted it was the sound I had wanted for years. On a whim I installed a Mod 8-20 in an old Peavey Rage 158 - the sound opened up with more lows and mids and volume. This small 15W amp is now my go-to for small rooms and recording.

Matt Richards

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

Kelly
Videos
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