I have a set of 12 pr series subs. They sound great and in a small seaed box. I tried a set of jl w0 which were comparable. The jl audio subs literally fell apart.
Memphis audio mono amp is good Soundstream is good Orion HCAA series amps. These are a few goodone's
NO STAY AWAY
Replacement audio speakers for a car can be bought at numerous locations. Good places to purchase them include car audio shops and car dealerships. Replacement speakers can also be purchased direct from manufacturers such as JVC, Pioneer, and Kicker.
Marine Audio would be for a boat or jet ski, not for a car. There is no "marine car audio"
If you are not happy with the sound of your car stereo, you can always buy a car audio equalizer. For the best quality sound this is a good option. It does come with a price though.
JL audio are a very good line of speakers definitely recommended for any car
The best ones believe it or not are mechanics because they know everything about cars. If they can fix a car, they can install audio into one. And they would be good at it.
One can find wholesale car audio by visiting the eBay website. One can also find wholesale car audio by visiting Onlinecarstereo and Car Audio Discount.
Alpine, Kenwood and Kicker are good brands of car audio amplifiers. You can go to a local Bestbuy or custom car shop to see what is available in your area as well as listen and compare the sound from test units that are set up in store.
My stock car is named the "Memphis Tempest".
How many hours does it take to travel from new Orleans to Memphis Tennessee by car