The latest subwoofer from Montagna (Italy) is made of Ergal and carbon fiber. The internal structure also features aluminum honeycombs and extensive damping for vibration-free performance. This 130 kg subwoofer is equipped with handmade 15# double Maxalco (Alnico V with oriented crystals). The efficiency is 96/97 dB and FS 22.8.

It can be either active or passive with three crossovers points at 80, 100, and 120 HZ. Thanks, Gianluigi"