Summary: We use two of these in our church worship music (It is a big room with capacity for about 1,000 people). The subs sound great for kick drum. We use the cva28s on top. The 15" sound is not quite as "high and tight" as the dual 12" sub from QSC. This 15" sub has more of an 18" sub sound. I compared this to the QSC sub, a few models from JBL, Peavey, etc., and this model was best overall value.
Summary: I purchased this sub based on cerwin vega's great reputation and it turned out to be a great decision. bass is deep and beefy just like any CV sub and matches my style of play. i dj weddings and other mobile events that range from as little as 50 guests all the way up to about 250 and this sub realy helps (i typically have 2 mackie SRM450 tops with this sub). im saving now to get a second one for some added reinforcement with the bigger parties.
Summary: This amp is essentially the same as the CV-1800 but with more power. A lot of reserve power. My amp is matched with the Intense speaker series with 2 of the subwoofers. I also have an equalizer, compressor & crossover. Sound is very nice.