With the down-firing port on the Impact 10, you get more bass output with less distortion. With its 250 Watts of amplifier power generating bass in the 32 Hz to 140 Hz spectrum, you get powerful output even in this entry level subwoofer.
The down firing port on the Impact 12 gives more bass output with less distortion than similarly priced subwoofer from other brands. With its 275 watts of amplifier focused on the 29 Hz to 140 Hz frequencies, you get a ton of bass for you dollar.
With the Impact Mini you get amazing bass in a tiny cabinet. This engineering marvel is lightweight with an aluminum cone, furniture-quality cabinet finish and concentrates its 300 watts of output power in the 38 Hz to 140 Hz range.