monacor AIRMT-85


1 990,0 kr 1 990,0 kr

High-end Air Motion Transformer tweeter, 20 W, 4 Ohm


2 in stock (can be backordered)

SKU: 013190. Categories: , , . Tags: , , .


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. 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




Additional information

Weight 0,3 kg


Technical Specifications

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
Depth 36 mm
Protective class
Admiss. ambient temp. 0-40 °C
Weight 0.3 kg
Packing unit 1
Type of speaker

Test results

Test results

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.”


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