I would get a new HU before purchasing an amp. This will be rather expensive though.

Not being able to hear your rear speakers isn't easily diagnosed with the information you've provided. The rear speakers could be damaged, your fader might be off, your HU might not be operating correctly...just to name a few.

Short answer is that adding an amp to the stock system won't get you where you want. And until you figure out why your rear speakers aren't loud enough for you...I wouldn't look into possible fixes.

 

The rear speakers may sound quiet, because they are located in the doors behind the front seats. I actually like the fact that the sound is coming from the front speakers. In my last car I turned down the fader to the rear speakers so I would get a better front stage.

I'm sure the audio quality of the factory speakers have a lot to be desired. The problem with just replacing the speakers without adding a quality amp is distortion. The head units amp is probably pretty poor and you risk damaging the new speakers with an under-powered OEM head-unit.

Basically, if you're going to replace the speakers you should also add an amp or get a head-unit with a decent built-in amp.

 

Thanks for the reply guys, but like for example if I have passengers in the back seat, i have to turn up the sound to around 20+(thats if you have a stock HU, you would know what i mean). But in some parts of different songs, of course the front ones would hit a bit harder then i have to turn it back down a bit, but then again you can't hear the highs...Thats why I as wondering. My Fader is set to 0 like it came from the factory. I will try and record a vid and see if it will show you what i am talking about....

 

The 6's radio, like most radios, even aftermarket ones is tuned to have a louder, more broad front stage. Thats why your front speakers sound much louder, and probably more clearer than your rear speakers. They probably have a more full sound(mixture of both highs and lows).

When I built my system, I started off small. I replaced my front speakers first. Still wasn't happy with the quality, I purchased better front speakers and moved the previous pair to the rear speakers. Still not completely satisfied, I purchased an amp to use with my stock Head Unit(1st gen radios are not only expensive to replace, the dash kit looks terrible, unless you dress it up like some members on here do). I was satisfied for the most part, but wanted more bass. Now I have a complete 2 amp, "7 speaker" audio system. All running off my stock Head Unit.

I must mention; even with the amp and aftermarket speakers, my factory headunit still tunes the majority of the sound stage to the front speakers. So if you do replace your speakers, buy some high quality( best bet would be a component set) of speakers for the front doors and a good set for the rear doors.

Hope that helps.

 

That helps a lot! One quick question though, if i wanted to lets say add 2 more speakers in the spots where the Bose system has speakers, would it help with the highs for the rear? And also would i be able to utilize the center rear big opening for a sub if i chose to add one? All i want is a quality system that has a nice sound and a bass that can hit, but not so much to make everything rattle around...

 

They would possibly help out with the rear depending on the aiming and height. Is the stock position for the 2nd gen Bose also in the sailpanels? It would help slightly, but the A pillars would be a better location, requiring modification though.

If you're on a budget, the easiest upgrade to increase sq (for budget) would probably be swapping out the speakers. And if you choose passive components in the front, you could be able to place the tweeters in the sailpanels or the A pillars.

There are many different ways to approach the quest for better sq and each person has their own plan of attack so you will get varying opinions as already stated. If you have a budget in mind, it would be easier to give some options but I'd say, with a budget around $200 or less, speakers first, then amplification and processing as your budget increases.

 

http://forum.mazda6club.com/electrical/256945-alpine-445u-oem-headunit.html I'm very pleased with this amp, buy some good speakers and you will be set.

 

I'll Definitely give this amp a consideration. Thanks for the Help!

 

Riki is the man to go to for audio questions.