12" Tornado Stealth 100

12" Tornado Stealth 100

General Characteristics
Nominal Overall Diameter 307 mm 12 in
Nominal Voice Coil Diameter 50 mm 2 in
Magnet Weight 200 g 7 oz
Overall Weight 2.2 kg 4.85 lbs
Flux Density 1.2 T
Voice Coil Winding Depth 10 mm 0.39 in
Magnetic Gap Depth 8 mm 0.31 in
Thiele-Small Parameters
Nominal Impedance 16Ω
Voice Coil DC Resistance RE 6.81 Ω 13.12 Ω
Resonance Frequency ƒS 72 Hz 70 Hz
Mechanical Q Factor QMS 9.51 14.28
Electrical Q Factor QES 0.74
Total Q Factor QTS 0.52 0.7
Mechanical Moving Mass MMS 29.9 g 31.9 g
Mechanical Compliance CMS 163 µm/N 163 µm/N
Force Factor BxL 12.93 Wb/m 15.72 Wb/m
Equivalent Acoustic Volume VAS 55.9 lt. 55.7 lt.
Maximum Linear Displacement XMAX ± 1 mm ± 1 mm
Reference Efficiency nO 2.82 % 2.45 %
Diaphragm Area SD 490.9 cm2 490.9 cm2
Losses Electrical Resistance RES 148.9 Ω 252.5 Ω
Voice Coil Inductance @ 1kHz LE 0.7 mH 1.16 mH
Constructive Characteristics
Magnet Neodymium
Voice Coil Winding Copper
Voice Coil Former Nomex
Cone Material Paper
Surround Material Integrated Paper
Dust Dome Material Non-treated Cloth
Basket Material Pressed Sheet Steel
Surround Treatment Yes
Electrical Characteristics
Nominal Impedance 16Ω
Rated Power 100 W 100 W
Musical Power 200 W 200 W
Sensitivity@1W,1m 98.5 dB 97 dB
100 watts
Available in 8Ω, 16Ω

The Tornado Stealth 100 is the original Tornado 12, the first of the new generation of Neodymium speakers in the Jensen offering with an added stylish bell cover over the magnet. Possibly the most versatile Jensen speaker ever, it has clear, almost HD top end, well-balanced midrange and powerful bass end. It lends itself to a wide range of musical genres, with a smooth, never aggressive personality, from fast solo runs, to complex chordal harmonies, to soulful lead tones.

Guitarist Description
Crystal clear clean tones, accented by shimmering highs with each note sounding tight and well defined. When presented with overdrive distortion, the notes remain well defined with lots of bite.
Specification Sheet
Product Dimensions
Note: all dimensions are in mm.
User Reviews

I ended up buying the Tornado Stealth 80 to go in my Bolt 30 watt tube combo.

Next to my Bolt 60 with the Tornado 100, these amps which otherwise sound identical, sound very different with these pictures. The Tornado Stealth 80 is very tight in the low end as advertised, and possibly a bit aggressive (I'm not big on metaphor when talking about sound), while the Tornado 100 is "rounder" and has more even-frequencies all around. Of course, the Tornado 80 is brand new and so I suspect it will take a few months to really hear what the speaker will end up sounding like, but for now I'm mostly satisfied.