Dayton Audio AMT1-4 Air Motion Transformer Tweeter
Borrowing technology from the original ESS Heil Air Motion Transformer (AMT), plus a German-made genuine Mundorf replaceable diaphragm, the Dayton Audio AMT1-4 makes a superb tweeter available at a supremely attractive price. Also referred to as aero-striction tweeters, the AMT concept uses a pleated Kapton diaphragm immersed in a consistent magnetic field such that the pleats constrict and expand with the musical signal, pushing the air out from between them in the forward direction when the pleats contract. The result is a tweeter that is incredibly accurate and immediate, and capable of sustained high output with ultra-low distortion for sensationally smooth, clean treble at any volume level.
Specifications: • Power handling: 30 watts RMS/60 watts max with minimum crossover frequency of 2,500 Hz at 12 dB/octave • Impedance: 4 ohms • Frequency range: 2,500-30,000 Hz • SPL: 95 dB 1W/1m • Dimensions: A: 3-3/4" B: 3", C: 7/8".
There are several new AMT models now. I have some of them, but may not be able to test them properly for some time (I need to make some kind of test baffle to facilitate regular driver testing in the future, and not have to build a speaker each time first....)
Originally Posted by Stereodude
The frequency response graph sure isn't pretty.
Maybe they just didn't do a good job of mounting the tweeters when they measured, could be if we see third party measurements, they might actually not be that bad?