Systm I use this for 2 seasons. The manufacture of the boxes is caring (Canadian birch plywood). The sound is dynamic trs, but the spectral balance temperatures requiring lower the gain of the sub-bass is too powerful for the satellite. Forums amricains, this product is plbiscit in configurations 4 satellites + 2 subs, or 6 + 4 satellite subs. The addition of satellite supplmentaires allows the other to increase the horizontal opening of only 60 for compression.