The FormSub can be added to, and combined with, any of the speakers in the Form and Heritage series. Powered by a 400W class D amp it is very powerful, and the bass unit is extremely fast, easily keeping up with the ceramic units. Because of its stroke (the distance the bass unit cone moves back and forth) it has a very dynamic performance.
Frequency range: 19-200 Hz +-3dB
Power rating: 400 W class D
Type: Ported system, port resonance 21 Hz
Drive units: One 10” extreme long throw
Crossover frequency: Third order, 30-120 Hz
Terminals/RCA: 10 kOhm, High input: 1 kOhm
Cabinet: 25mm MDF