Air Motion Transformers
are a special type of tweeter systems which have been developed by the German physicist Oskar Heil during his research on the characteristics of the human ear. The main feature is a film-covered cone with a special folding which vibrates like an accordion when an audio signal is applied. This folding allows to accommodate a large cone area at a minimum of space. The AMTs feature a dynamic sound, an excellent transient response, a high efficiency and a low harmonic distortion.
High-end Air Motion Transformer tweeter, 20 W, 4 Ohm
- Tweeter based on the principle of Air Motion Transformer
- High-performance neodymium magnet system
- Fine, dynamic and brilliant reproduction of the high frequencies
- Folded cone made of Kapton and aluminium
- High efficiency
- For use from 2,500 Hz on
- Robust aluminium front panel
Klang+Ton 08,09/2016
“Compact AMT with quite a low crossover frequency possible for two-way speaker systems and multi-way speaker systems of highest quality.”
| Impedance (Z) |
4 Ohm |
| Transmission method |
- |
| Frequency range |
2,000-30,000 Hz |
| Resonant frequency (fs) |
- |
| Rec. crossov. frequ. (fmax.) (12 dB/oct.) |
> 2,500 Hz |
| Power rating (RMS) |
20 W |
| Peak music power output (MAX) |
40 W |
| Sensitivity |
92 dB/W/m |
| Max. rated SPL |
- |
| Max. voltage |
- |
| Radiation angle, horizontal |
- |
| Radiation angle, vertical |
- |
| Suspension compl. (Cms) |
- |
| Moving mass (Mms) |
- |
| Mech. Q factor (Qms) |
- |
| Electr. Q factor (Qes) |
- |
| Total Q factor (Qts) |
- |
| Equivalent volume (Vas) |
- |
| DC resistance (Re) |
3.8 O |
| Force factor (BxL) |
- |
| Voice coil induct. (Le) |
- |
| Voice coil diameter |
- |
| Voice coil former |
- |
| Linear excursion (XMAX) |
- |
| Eff. cone area (Sd) |
- |
| Magnet weight |
- |
| Magnet diameter |
neodymium rods |
| Mounting cutout |
Ø 66 mm |
| Mounting depth |
36 mm |
| Mounting hole diameter |
Ø 75 mm |
| Hole spacing X-axis |
- |
| Hole spacing Y-axis |
- |
| Dimensions |
?85 mm x 36 mm |
| Outside diameter |
Ø 85 mm |
| Width |
Ø 85 mm |
| Height |
- |
| Depth |
36 mm |
| Protective class |
- |
| Admiss. ambient temp. |
0-40 °C |
| Weight |
0.3 kg |
| Packing unit |
1 |
| Type of speaker |
- |