Hello. This is my first post here. I have lingered for awhile, reading a lot, seeing how you guys do things and also attempting to obtain all of the necessary information before I posted this question. Thanks in advance for any help you can give. I apologize if this is long-winded. I have a fairly cheap HT setup. I recently upgraded the speakers, all Sony. They aren't the best, but a huge step up from the tiny satellite speakers I previously used. I have 3-way floor-standing towers for the front stage. They have an 8" woofer, 3" (i believe) mid-range, and a 1" tweeter. Center channel is two 5 1/4" woofers, with a tweeter. Surrounds are typical bookshelf models, one 5 1/4" woofer with a 1" tweeter. All are a voice matched set.. The surrounds are being connected using a RocketFish wireless device. (love it, wife loves it too, she hated me running wires under the carpet. In the attic/walls is out of the question as we both love to rearrange the room frequently) I have a Sony receiver running this, the original one that came with a cheap $300 Sony HTIB setup. It seems to have decent power, running these speakers fairly well, though I know a newer receiver with more power would make a large difference. For reference, the receiver (unsure of model, can't seem to pin it down using the internet either) has a single LFE output, this ties into my question. The original subwoofer that came with the setup was an 8" anemic POS. A year or so ago I sold a Firebird I had as we no longer wanted to dump money in it (I still miss her, smallblock V8, loved it, *sniff). Part of the deal when I sold it was that I was going to keep the Earthquake amp and subwoofer (plus tiny box) that was in the car. I am using the amp in my current car, driving a sweet setup. I have Polk SR components and a Polk SR 10" subwoofer. I realize the amp is not the greatest, but these speakers are so awesome! Eclipse AVN6620 navigation HU driving) The sub sat around awhile, and one day I decided to upgrade the HT subwoofer using it. I spent a lot of hours searching the internet and using multiple programs in attempt to come up with a good box for the sub. I don't know if I built it correctly or not. It's ported, but I don't have the specs on me right now, but that's not really the point anyways. I figure I need to build a new one or buy a new one after I talk with you more knowledgeable folks. Here are all of the specs I can find on this sub. I hope it's enough. I have searched high and low attempting to find more specs, but this is it as far as I can tell. This info comes from two different websites, and a couple things seem to conflict, but nothing of huge importance. MODEL: DB-10 Street Pro 800 MAX (I cannot find an RMS rating anywhere, however I estimate it to be 300-350 watts. I know it doesn't matter near as much in a HT setup) Frequency Response = 26Hz - 1.3k Sen = 87dB 50 Oz magnet 2" polymide coil (4-ohms) Sandblasted pressed pulp fiber cone High roll santoprene surround Jet-black, textured basket Stitched leads MSRP: $165.00 - Fs = 29Hz - Qts = 0.5584 - Vas = 1.30 cubic ft - Sen = 87dB - 2" polymide coil (4 - ohms) - 50 Oz magnet - Santoprene surround My questions: 1. Is this sub decent for HT? I love low bass. The current setup seems to be decent. In the second Matrix movie (or third, always mix that up), when the Hammer flies over to pick up Neo and gang on the ground, it absolutely shakes the house. However, I know the sub is not going very deep (maybe hits 30hz at a decent DB, I have used a test CD with test tones down to 20hz). The sub also does not move very much, and I know I need a dedicated amp to really drive it correctly. For as little as it moves however, it outputs quite a bit. Shakes the crystal glasses of my wifes in the kitchen easily, vibrates stuff on the other side of the house 2. What would be the ideal box for this sub? Ported, sealed? Size? 3. What would be a good amplifier for this sub, bearing in mind the proper box? What kind of power handling are we looking at, to reach mechanical / thermal limits at low frequencies? Not looking to spend alot of money, I know the Behringer line of Pro amps look great, good power for a good price. Any help you can give would be awesome! Thank you so much!!