I currently have the luxury of owning this sub until Friday and although I've only had this sub for 3 days, I can simply not stress how surprise I was when I heard the way it performed. For those of you who don't know, this sub is only measured at 10 1/2" X 10 1/4" X 12" (H/W/D), is absolutely tiny and only has an 8" driver, but don't let that fool you cause it can certainly pack a mean punch when called upon. It has 600W of RMS power and can dynamically reach to a peak of 1200W, offering almost twice the dynamic power of the CHT-15 This sub is not servo-controlled like the HGS series but in keeping with Velodyne's strong reputation of restricting distortion levels to a bare minimum, it incorporates a distortion limiting "Dynamic Driver Control System" which assures the tight, accurate, musical bass for which Velodyne is world famous. "DDCS" is an active, signal-based system incorporating several exclusive, new technologies from Velodyne that assure linear cone movement, and control the driver's frequency and distortion characteristics. This reduces the distortion to 1/6th that of competitive subwoofers. Now before we go on, I should note that this sub was tested in my 12 x 15 feet living-room and the entire review is based on how it SOUNDS IN MY LIVING-ROOM - there is a very strong possibility that the sub will sound entirely different in someone else's room, amongst entirely different equipment. Now on to the way this tiny sub sound with movies. I tried Toy Story 2 R1, LOTR R1 (DD 5.1), Titan AE DTS, SW: AOTC and on all those dvd's the SPL-800 sounded simply superb. It offered the same trouser flapping effect that I got from my CHT-15 but not quite as much as the HGS-18. During playback of those films I did not notice a single bit of room-boom that I get from the CHT-15 and the HGS-18. The SPL-800 offered nothing but tight, low, clean and trouser flapping bass that easily matched and at times even surpassed the 15" CHT-15 down to 28hz in terms of accuracy. In LOTR, the scene where Balrog is walking, because of the sheer rumble that shook the whole entire living-room (THIS IS FROM AN 8" DRIVER ), I had to check that the IFE was actually coming from the tiny SPL-800 and when I saw that the driver cone was moving and generating all that bass, I was simply awe-struck . In SW: AOTC, when the Jedi Knight uses their light sabre, OMG each swing just fills the entire living-room up with tight bass and not only that, but it causes the trousers to flap as well. The only film that I've tried (haven't tried The Haunting btw) where the HGS-18 has a huge advantage over the tiny SPL-800 in terms of performance is Titan AE R1 DTS. In chapter 16 'The Ice Rings, the SPL-800's in-ability to be able to output strong frequencies below 20hz makes for a very audible difference if one has heard that passage with the HGS-18. Thats not to say that it doesn't sound bad because it doesn't, infact it sounds great. You will just be hearing that passage without the really low notes which a lot of subs can't reach anyway (bar the Servo-15/SVS and other few top performers). The SPL-800 is superb with music and easily intergrates with the rest of my speakers as well as my HGS-18. Hear are the pros: Is able to output very tight, clean, and accurate bass. Can easily match the CHT-15 in the trouser-flapping department down to 28hz. Is able fill up a small to medium size living-room with high SPL bass. Cons: Absolutely nothing. This sub only has an 8" driver so you really can't expect it to go flat down to 20hz and below. The sheer fact that it is able to perform the way it does completely baffles me. This is easily the best compact subwoofer I have ever heard and I would be quite happy to have one in my living-room if I never had the HGS-18. In fact, regardless of the size, its definitely up there with the best. I simply dread what the 12" driver sounds like (SPL-1200).