This post is really long, with some background detail. For those of you who dont want to read the whole thing, I am looking for a 10" woofer with an F3 of 30Hz or less in a .8-.9 cu-ft enclosure for car audio application that is $50-$70. Any help? Normally I would post this in the after hours lounge since its really about car audio, or in the DIY area of I was building this myself (but I'm not). Since its just a question about passive subs and driver specs, I thought it might benefit the readers here that dont hang in the DIY area. I'm planning on getting a new car in October, and being the big impatient nerd that I am, I've already started researching the changes I'm going to make to the stereo. It will be a Subaru Impreza WRX wagon, and I am keeping the stock head unit. I will be using a 50X4 amp in three channel mode to power the fronts - which I will be upgrading - and a single sub (rear speakers will remain powered off head unit. So, any way. I go to the local car audio shop (the only one in town that I would trust to do an install on a brand new car) and let them know what my plans and that I dont plan on spending 1 or 2 grand on this, but just a few hundred dollars. So he shows me this JL Audio 10-W-0 sub (10" sub "zero" series is JL audios lowest series). They want only $100 for one 10" in a .8 cu-ft enclosure. I am unable to listen to the sub in this configuration since their listening room is setup for visual apeal not audio (Please dont say, "I would never buy from a place that wont let me demo" these guys win tons of awards for flashy installs, and due to the car audio market must cater to 16-20 yr olds with mom and dads money). So, to get to the point of the topic, I go to JLs website and look up the specs for this sub. The F3 in a sealed enclosure is like 43Hz. There is also a frequency response graph that shows that the sub drops off really high in a sealed enclosure, so I assumed that the F3 is the point that the sub is down 3db in a given enclosure (also the F3 was a different number for a ported box) Now, I dont want boomy bass, so maybe a sealed enclosure is good, but I'm not apposed to ported boxes except the boxes they had there were like 5 times the cost of the woofer ($250 for a vented box built custom for the JL woofers and only $50 for the sub on sale). So, is there any 10" woofer on the market that will do better than 40Hz in a 1 cu-ft enclosure without eating up my whole budget? It doesnt have to be big name... anything from parts express??? other DIY vendors? Basically the box and woofer are on sale for $50 each. I would like to stay under $120 so if I can find a more capable woofer for $50-$70 shipped (maybe asking to much?) then I could just go buy the box. Any thoughts?