If you are looking for a reasonably priced dual subwoofer that has high quality sound and an even better look, 6.5" Subwoofer is the best and right choice. I also was thinking the same few days back when I had to purchase it and I found this website and the information and reviews was really great. You can also go with this website and get information so that you can be able to be in a better position to buy it.
I would recommend Memphis subs. I've used them a lot and they are awesome sounding especially for the price. The problem 12's are around a hundred bucks. If u wanna spend a few hundred more you can go with the mojo's. I have an older model m3 mojo 15 and I've got 1100 true watts rms going to it and it almost makes ur ears bleed. But at lower volumes it's also tight and clear. Memphis is underrated. They have great subs and amps.
There are a lot of manufacturers that are producing subwoofers and other audio components, however, just a few can be considered the best and the most respected by audio fans. Here is top five:
MTX AUDIO American company specialized in speakers and amplifiers is well known for its quality products and wide selection. Very active on subwoofer market, MTX with its subbrand Kicker has some of the best subs available and loyal following among buyers.
INFINITY Another American company, active since late 60ï¿½s and very famous among audiophiles for perfect quality and the crystal sound of their products. Infinity has a nice selection of all kinds of speakers especially subwoofers and you can not go wrong with this manufacturer.
JL AUDIO Not so known as other famous companies, JL Audio is active since 1975 and was constantly improving its products. Today it offers a good selection of car speakers and subwoofers and it is a company which deserves more recognition.
ROCKFORD FOSGATE I have already written about this American company. With is line up of upscale products and audio components, Rockford Fosgate is among the best manufacturers in the world and every their product is a quality item.http://www.audiodrive.org/
I ve had both the JL and Sundown in my truck. I preferred the Sundown more. To me things like kick drums sounded better on it m a drummer and metal head haha). However I recently installed 1 of 2 new SI BMiii and it walks all over every sub I have ever owned. I am just waiting on finishing my box so I can install the second one. I can't imagine how good the mark v is going to be considering these subs are a few years old. I would consider checking them out. I've never had any issues with SI like Nick stated but I've read about others having problems. I'm sure some used mark it will be popping up in the classifieds soon. Just something to consider.https://atfulldrive.com/best-car-subwoofer