I'm used to at home an excellent subwoofer. At this quality of magnate is certainly not enough zoom. However, he is supporting the series loudspeaker in Passat 3BG (which are not bad) ideal. I operate the subwoofer with an amplifier of Crunch (GTX 2600), which has at 4 ohms bridged over 600 watts. The combination has succeeded the subwoofer absolutely stable levels. However, that is but well to the vehicle, frequencies are not reproduced below about 25 Hertz. More power is nonsense. The ears can be - who's needs - even shoot hereby.