Yes the 1120 does all the filtering and levels etc for you, any jiggery pokery in the sub will be by-passed.I have been thinking about a sub since I got my 1120. Every time one pops up with positive remarks I have a look but this one doesn't seem to exist or perhaps it has different naming in different markets? The are a number in their 3000 series but no pro SVS 3000 Series. On a more general question is it worth having a sub with DSP with the 1120 because surely it does it for you? Never having delved into the world of subs I don't really know!