These are woofers available in market and many of them are giving very ultimate sound quality. If we talk about brands then there are many which can’t describe. Many people use to think that if they want to make their car robust sound system then big woofer will work for it. But you are wrong if you install small subwoofer and powered them as they need then you see the sound given by subwoofer and ultimately fails the large sub woofer. The entire large sub woofer need more space and radiate more energy but if you give same amount of power to both then you will see large sub woofer require more space to pas air and achieve optimum performance but sub woofer don’t need more space to install and give better results as compare to less space. Sub woofer can install under seats behind truck seats which makes them best among all when they give best result.
There is a huge range of sub woofers in market which suits your vehicle with low space. You are advised to use amplifier together with car stereo and sub woofers they give more power to sub woofer and it blow more sound with lots of bass and failed bass tube facility which is much bigger then sub woofer and not affordable for everyone to buy. At the time of using amplifier make sure that RMS power given to amplifier is more than sub woofer and this will results to give more sound with better base quality. When you use two channel of woofer make sure that second channel must be bridged double the power of first channel.
These of 8″ subwoofers can be purchased on internet with lots of option of different brands and test the frequency and sensitivity response that they are without fault.