Summary: First off I bought these when amazon kept having them on sale for ~$50 Shipped. At $100 don't touch them, there are better options. I went through 4 of these before I gave up on them. They are great sounding subs as long as you are not trying to actually bump them hard at 400RMS. My system is properly tuned and even with gain turned all the way down to prevent clipping these things still smoked. Pioneer customer support is a joke.
Summary: I was kind of skeptical when I bought this sub because of the price it was listed at. I installed it in my 2004 honda accord facing the back of the trunk with the Pyle PLA2200 1,400-Watt amp and this thing bumps. It looks sleek and you can get a lot of power out of it if you have the right set-up. I only have one of these things and it rattles my whole car. It shipped fast and I haven't had any problems in about 8 months of using it.
Pioneer TS-W309S4 12" Subwoofer with 4 ohm single Voice Coil.
13 April 2013
Summary: You can't go wrong with Pioneer this company has been around for a long time. I have this sub installed in a single bandpass enclosure and it does just fine running on a small amp, so it's a little under driven. However if you're into that hard core booming with just Bass and tweets with no real sound and prefer to go def I would suggest an amp with a 400 watt RMS output rating. I chose the Five Star rating because of Pioneer's history.
Summary: These subs are good for the price. The only complaint I have is the black coating they use on the backside of the sub face. After a few hard jams, the black coating has started peeling away from the clear plastic face. It doesn't affect the sound quality, but it makes the subs look really old; even though I've only had them a month.
Summary: I jus recently purchased a pair of these subs, and am pleased to say that they impressed me the first day i put them in. They are power by a Pyramid Artic Series 1000 watt 2 channel amp, and they've got the bass to drop. They got my seats shaking with every low that drops. Now that i have them i got people wanting to challenge me. Overall they're top of the line subs and you get more than enough for the $$$$$$!!!