The AMT 60.1 from Omnes Audio clearly belongs to the group of cheap AMTs - its price is well below 100 euros, although it does not belong to the very small copies. The resonant frequency of the AMT 60.1 is just as readable and is pretty much two and a half kilohertz - it can be used accordingly low. Even at a level of 95 dB, nothing speaks against a crossover frequency of three kilohertz.
