1. Mod Series
  2. Mod 8-20

Mod 8-20

MOD8-20 angled view
MOD8-20 angled view
MOD8-20 bottom view
MOD8-20 side view
MOD8-20 top view
8Ω
4Ω

General Characteristics for 4Ω

Nominal Overall Diameter
207 mm
8 in
Nominal Voice Coil Diameter
25 mm
1 in
Magnet Weight
160 g
6 oz
Overall Weight
0.68 kg
1.5 lbs
Flux Density
1 T

Thiele-Small Parameters for 4Ω

Voice Coil DC Resistance
RE
3.26 Ω
Resonance Frequency
ƒS
111.2 Hz
Mechanical Q Factor
QMS
19.23
Electrical Q Factor
QES
1.91
Total Q Factor
QTS
1.74
Mechanical Moving Mass
MMS
10.1 g
Mechanical Compliance
CMS
204 µm/N
Force Factor
BxL
3.47 Wb/m
Equivalent Acoustic Volume
VAS
13.1 lt.
Maximum Linear Displacement
XMAX
± 1.5 mm
Reference Efficiency
nO
0.9 %
Diaphragm Area
SD
213.8 cm2
Losses Electrical Resistance
RES
32.8 Ω
Voice Coil Inductance @ 1kHz
LE
0.3 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
20 W
Musical Power
40 W
Sensitivity@1W,1m
93.2 dB

General Characteristics for 8Ω

Nominal Overall Diameter
207 mm
8 in
Nominal Voice Coil Diameter
25 mm
1 in
Magnet Weight
160 g
6 oz
Overall Weight
0.68 kg
1.5 lbs
Flux Density
1 T

Thiele-Small Parameters for 8Ω

Voice Coil DC Resistance
RE
6.5 Ω
Resonance Frequency
ƒS
119.4 Hz
Mechanical Q Factor
QMS
19.88
Electrical Q Factor
QES
2.52
Total Q Factor
QTS
2.24
Mechanical Moving Mass
MMS
10.3 g
Mechanical Compliance
CMS
173 µm/N
Force Factor
BxL
4.45 Wb/m
Equivalent Acoustic Volume
VAS
11.1 lt.
Maximum Linear Displacement
XMAX
± 1 mm
Reference Efficiency
nO
0.72 %
Diaphragm Area
SD
213.8 cm2
Losses Electrical Resistance
RES
51.1 Ω
Voice Coil Inductance @ 1kHz
LE
0.4 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
20 W
Musical Power
40 W
Sensitivity@1W,1m
93.2 dB
MOD8-20
8",
20 watts
Ohms
4Ω
8Ω

Straightforward tone with smooth highs and more predominant lows. It responds to overdrive distortion with a mellow fuzz overdrive.

Lows
Loose/Fat
Mids
Firm
Highs
Smooth
Overdrive
Smooth
Guitarist Description
Straightforward tone with smooth highs and more predominant lows. Responds to overdrive distortion with a mellow fuzz overdrive.
Bassist Description
Bright
Sound Samples
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Specification Sheet
Product Dimensions
207.0178.55.049.01.0n°4 holes Ø 8 × 5at 90° on Ø 197.04.067.0Ø 72.018.0
Note: all measurements in mm.
Frequency Response Charts
8Ω
4Ω
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Hover over the graph to see values. View full size graph
Confused? Find out how to read this frequency response chart.
Compare this frequency response chart against other speakers
User Reviews
Submit your own review for Jensen Speakers!

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 bought four 8" MOD speakers for a 4x8” cab project I was working on. I’m really happy with the speakers. They were easy to install and sound really good paired with a Fender Pro Jr as the head. Congrats on a great product.

Ed in New York, NY