Last night I got hear here my sub setup for the first time. My setup consists of 1 Tempest mounted in a sealed enclosure with a net volume of 5.23 cubic feet. The sub is being driven by a Nady XA900 pro-amp. I have the amp running in stereo with 1 of the subs VC’s on each channel. The amp produces 200wrms per channel at this load so the driver is seeing a total of 400wrms. The room is 17 x 23 with a cathedral ceiling. Just for reference the main speakers and center channel all consist of Vifa MG 7” woofers and a Morel MDT-20 tweet. Impressions of the Nady XA900 amp – I definitely would recommend this amp to anyone. It is as solid a build as any component I have owned. Power is definitely there and I have no doubt that it is producing the power it claims. The fans are not too loud but are noticeable from my seating area. However with the dual fans the amp stays as cold as ice. I ran it hard for a good hour and the air blowing out from the fans was still rather cool. All the controls and hookups are all very solid and don’t feel cheep in anyway. The amp looks great as well. Total cost for the amp including shipping was $192 from www.musiciansfriend.com. If you are in the market for a good amp at a low cost this is an almost unbeatable option. Now how does it sound? Music - OK this is where this sub really shines. This ranks right up there with the most musical subs I’ve heard. Not boomy at all. The sound is probably best described as controlled and natural. Even when I drive the sub to its limits there are no harsh noises or groaning coming from it and the accuracy never seems to fade. Kick drums have a depth to them that I did not hear with my previous sub. The sound gives me the impression that it is not reproduced sound but is actually just music. It seems to just fade away in the background. Output is good. I must say that on many tracks I would like to have more but I also listen to music at higher volumes then most (just as a side note, I used to have a car that was capable of [email protected] Movies – As with the music the sub just seemed to disappear into the overall presentation. I felt it lacked the ability to play some demanding scenes at true reference levels but as I mentioned earlier I probably have skewed opinions of this. I watched the mines of moria in FOTR and it was very impressive. The floor shook during the battle with the cave troll and the balrog. Depth seemed almost endless. Through all this pounding the material was still played with total accuracy and there were no unwanted noises, just big clean bass. They dynamics of the system are great. There were small subtle details that I noticed that were not overplayed or to loud but as soon as the real action started you were enveloped in the action. The only thing that I can say is that I would prefer to have some more output and headroom but the average listener would have most likely wanted it turned down. In conclusion – This is one of the best all around subs I’ve heard in any price range. The total cost of this setup was right at $400. The honest strait truth is that there are simply no commercially available subs that could even remotely compare this setup in any area for that price and there probably isn’t even one that could truly best it for triple that price. My output issues will be solved later this year when I put 4 tempests in an IB setup, but for now this sub is very satisfying, very versatile and highly recommended. Thanks a lot to Kyle Richardson for all the help!!