I bought these speakers to replace existing equipment. I recently installed a JVC car which revealed a problem of bass .... this is the weakness of this position (see my comments on this subject). Big disappointment .... I thought my Mac Audio accounted vibration and spitting when we drove ... a bit low ... so I just substituted for Sony. The problem is not completely solved, but the improvement is really obvious. So happy with this purchase. A good point for Sony, JVC bad!