12" Tornado Stealth 100
| 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 |
| Nominal Impedance | 8Ω | 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 |
| 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 |
| Nominal Impedance | 8Ω | 16Ω | |
|---|---|---|---|
| Rated Power | 100 W | 100 W | |
| Musical Power | 200 W | 200 W | |
| Sensitivity@1W,1m | 98.5 dB | 97 dB |
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.
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.
