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 |
- |