[MVR 155]

Like Greco says you can grab the signal from the existing sub, use a LOC (line out converter) which can be purchased from any chain electronics store (Best Buy, Circuit City, stereo shop etc....), tapping the signal from this point will allow you to control the sub from the head unit (same as the factory sub). In both my 06 and my 07 Type-S I disconnected the factory sub as it sounded better without using it. The stock ELS system has a great clean sound but I think it lacks ultimate volume and deep/low bass, adding a new sub will definately help pick up where the factory left off.