Question about Car sound system ....

I'm not sure if you guys know anything about car audio system but I'll just ask anyway . I'm thinking of replacing the stock speakers on my Nissan Altima 2009 , My car does NOT have the premium Bose sound system so the sound quality is not that good . A local store has a good deal on 2 of these JBL speakers along with JBL 1000w Sub . I'm thinking of installing those on the driver side/passenger side doors and I'm thinking of getting 2 more of these speakers to replace the back seat dash speakers as well as getting a 2 way channel pioneer amp they have on sale . My question:

1) will i notice a big difference in audio clarity/quality from stock speakers ?

2) knowing that i will get an amp , do i have to replace the stock head unit/radio ?

3) Should i install the extra 2 speakers in back seat doors or dash ?

4) is it necessary to repalce front dash / back seat doors speakers along with those ?

Thanks in advance .

You always want to start with a good head unit, get a top brand that you can change speaker Frequencies. You can take the bass out of your main speakers and let your sub handle all of the low frequencies, this way you won't have to replace your main speakers. The easier way to get good sound is add a new head unit paired with a sub and amp. The way you're explaining, most stock radio units make it Difficult to add a sub and amp. They don't have remote or rac jacks you would need to add a amp and sub, you can add a sub and amp still it just means cutting wires instead of plug n play. If you're going to replace the speakers I recommend replacing all of them with the same brand so they match well. The most major difference in sound quality leads from your source, the radio then speakers. #1 thing is upgrade your radio then go from there, remember you get what you pay for when it comes to car audio.gagit811

Thanks for the input , I did some research and found this Sony radio , it has good reviews and seems to have good features overall . Think this would be a good replacement ? Do i need to get an aftermarket radio kit for this ? if so , where can i get them ? Thanks .

I'm not sure if you guys know anything about car audio system but I'll just ask anyway . I'm thinking of replacing the stock speakers on my Nissan Altima 2009 , My car does NOT have the premium Bose sound system so the sound quality is not that good . A local store has a good deal on 2 of these JBL speakers along with JBL 1000w Sub . I'm thinking of installing those on the driver side/passenger side doors and I'm thinking of getting 2 more of these speakers to replace the back seat dash speakers as well as getting a 2 way channel pioneer amp they have on sale . My question:

1) will i notice a big difference in audio clarity/quality from stock speakers ?

2) knowing that i will get an amp , do i have to replace the stock head unit/radio ?

3) Should i install the extra 2 speakers in back seat doors or dash ?

4) is it necessary to repalce front dash / back seat doors speakers along with those ?

Thanks in advance .

ultrapc

gagit811 has a lot of good suggestions, but I'm going to offer a bit of a different viewpoint, and maybe save you a few bucks along the way.

To start, your front doors fit a 6.5" speaker, not the 6 x 9" JBL you listed. They will not fit in the stock location. Skip the sale on those speakers and find a nice pair of 6.5" component speakers (components have a separate woofer and tweeter, as well as a dedicated crossover). Component speakers offer significantly better sound.

Start by visiting Crutchfield.com. Crutchfield has decades of experience in custom car audio, they'll provide Master Sheets for your car that will guide you through the installation process, and they offer lifetime phone support, so you can just call them to ask questions if you get stuck (and they're good). Specifically to answer your questions:

1. Aftermarket speakers will offer a huge improvement over stock in almost any vehicle, even those with "premium" sound systems already installed. I would argue that replacing the speakers is a better upgrade than replacing the head unit if you had to pick, but ideally you want to replace both at the same time.
2. If you're getting an amp you need to either replace the factory head unit or get a special processor for your head unit, the latter of which is very expensive. By installing an aftermarket radio you will lose steering wheel controls in most instances, if you have them; a Crutchfield support member can walk you through that. Some aftermarket radios can actually be programmed to work with factory controls, if you buy the right module. You'll have to check.
3. Ignore the rear speakers. In fact, disconnect them. Rear speakers muddy your soundstage. At home you only use rear speakers for surround effects, and in a car where you're just listening to music they're not necessary. Serious IASCA and USAC (USAC no longer exists, but used to be an auto sound competition provider) SQ (sound quality) competitors rarely use a pair of speakers in the back. Focus on a quality pair of component speakers in the front and a great sub, and you'll have an excellent sounding system.
4. I believe my prior response should answer your fourth question.

In addition, I would suggest either a high-quality three-channel amplifier, or two amplifiers: A two-channel for your front speakers and a mono amp for your subwoofer. You do not need a Double-DIN head unit unless you want the larger screen, which is fine, but a $200 JVC head unit will have high-quality preamp outputs and all the features you want in a single-DIN installation without a fancy monitor. It depends on what you want.

I hope this is helpful. I'm a former MECP-certified installer and db Drag competitor, and happy to offer additional advice if you have further questions.

Good luck!

Boz

Bozanimal

Thanks for the input , I really appreciate it . I've done some research and decided to go for 2 of these6.5 speakers for the front door , 2 of these6*9 for the rear dash . Thing is , my car has an 8 speaker sound system (2 front dash , 4 doors and 2 in rear dash). As for the head unit , I've decided to go with thissony HU as a replacement for my factory HU (Unless you have a better suggestion at a similar price ). I would contactcrutchfield but I'm not in the US or Canada. As for the installation , I'm thinking of having all of these professionallyinstalled . Any way , I hope you don't mind answering a few more questions . I'm a noob when it comes to this stuff , i just want a better sound system :P

1) Are the speakers i linked good component speakers ?

2) Which of the 8 speakers in my car should i replace ?

3) The head unit i linked has a amp installed (as it says on the website) , does that mean i still have to get an amp ?

Thanks in advance .

Thanks for the input , I really appreciate it . I've done some research and decided to go for 2 of these6.5 speakers for the front door , 2 of these6*9 for the rear dash . Thing is , my car has an 8 speaker sound system (2 front dash , 4 doors and 2 in rear dash). As for the head unit , I've decided to go with thissony HU as a replacement for my factory HU (Unless you have a better suggestion at a similar price ). I would contactcrutchfield but I'm not in the US or Canada. As for the installation , I'm thinking of having all of these professionallyinstalled . Any way , I hope you don't mind answering a few more questions . I'm a noob when it comes to this stuff , i just want a better sound system :P

1) Are the speakers i linked good component speakers ?

2) Which of the 8 speakers in my car should i replace ?

3) The head unit i linked has a amp installed (as it says on the website) , does that mean i still have to get an amp ?

Thanks in advance .

ultrapc

1. The speakers you linked are not component speakers, they are coaxial speakers. Component speakers have a separate woofer, tweeter, and crossover. The 6.5" JBL's you linked have a passive cap strapped to the side: It's better than factory, but not quite as good as components (http://www.crutchfield.com/m_399/Car-Speakers.html?tp=12). Those "eight" speakers they're talking about in the factory system are referring to the separate woofer and tweeter in the front, which I would personally consider one pair of speakers, though it is technically accurate.
   
   Anyway, to your question "are they good," they're okay. JBL makes awesome subs and amps, but their midrange speakers and tweeters are not known for being fantastic. You can look to the Mylar/Titanium composite tweeter, which is not the greatest of materials. Silk tweeters have better audio qualities; in particular silk tweeters don't get that harsh sibilance (think of a harsh "s" sound) that metal composites are prone to.
2. As I mentioned, those "eight speakers" are counting the woofers and tweeters separately. I'm not sure how the rears are mounted, but my opinion remains to skip the rear speakers entirely and spend a little more on the fronts. A nice pair of Infinity or Polk separates will sound very nice up front.
3. All receivers have a "built-in amp," and this is true for the Sony you linked. But it's not the same as a dedicated amplifier, it puts out 17 x 4 watts RMS. That won't power a set of components well, let alone a subwoofer. If you're just replacing the factory speakers with coaxials then the head unit is fine. If you want an impressive system with stong bass, clear midrange, and sparking highs, you'll want dedicated amplifiers.

I'd call Crutchfield, even if you don't end up buying from them, and talk to one of their reps about options for your car. Seriously: They've got a great reputation for customer service for a reason. I've used them off and on for over 15 years depending on what I was buying. Talking to someone about what you want to do will be a huge help, and you can always take their recommendations and come back here to vet them.

Happy to help,

Boz

Bozanimal

Interesting stuff, if i understood right , the tweeters and crossovers in component speakers are mounted in the front dash while the woofers are in each of the doors ? I thought there was a seperate coaxial speaker under each grill in the car :P . If this is true , then I've been planning to buy an extra pair of speakers for for the front dash and i would have been disappointed :p Anyway , As it turns out , component speakers are a bit more expensive than coaxial but since I'm taking ur advice and only replacing the front speakers , it should be within my budget . Anyway , i looked up Polk component speakers and found these on amazon, They're about 30 dollars more expensive than JBLs but the reviews seem very positive, and i also fould an alpine 4 channelamp for a good price but it's 300watts so idk if that's enough , The stores in my area have none of those components so seems i may have to ship them from amazon . What do you think of Base tube box ? I found a JBL one in a store in my area for a good price , this one in particular . If you think these speakers,amp and sub (with new HU) are good enough replacement i will order them all in one package this week .

Thanks again , you've been very helpful .

Edit : It seems that my car does have seperate tweeters mounted in the front dash , so i guess component is the way to go , though i wonder where the corssover will go :O

Edit 2 : Since the car has seperate tweeters , I'm guessing it should have a built in cross over aswell , right ?