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well i don't know about your DSP, but if you want the best stuff spend the money, it all depends on how much you want to spend.
YOU NEED TO GET ALL AFTER MARKET PARTS. If you want to spend around $6g then i would suggest getting Diamond audio for the speakers and sub, one word AMAZING, blows MBQ out of the water, like a Regular 528 to an M5, both very good cars just one is better, same with these speakers. Go with the HEX speakers and the a TDX sub. These are the clearest, cleanest speakers for the price. To get the system as clear as possiable you need to have good amps and headunit. I would suggest a Diamond amp for the speakers and sub, very good and they are built using there speakers so the sound is unbelievable. For a Head Unit i would suggest either Eclipes or Kenwood Excelon. One of the higher end models, there are both very good and will sound the best. And get the best wires you can afford, those are the weaklink in most systems.

As a side note, for the best reproduction of bass an 8" sub sounds better than a 10" or 12", they reproduce a more natrual sound. If you want it louder than get two 8" or maybe 3 but that could get to loud. For Hard rock music or fast music a smaller sub like an 8" will be better, because it can move faster than a bigger sub, the biggest i would go for hard rock is an 10" and 12 or even a 15" can not move fast enough to go with the music.

This is just a few suggestions, It can be very pricey but it will be well worth it. If you need any more help setting up a system i will be glad to help, and no i don't work for Diamond, they just make really nice stuff, feel free to email me at [email protected]
 

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For a $1500 system i would go with The lowest end model of a Kenwood Excelon, very nice deck for $300, very nice, blows all other out of the water in that price range. For speaker is would run Kenwood Excelon Dual Mags coaxials, very good sound for a really good price, they sound almost like MBQ. For about $200 a pair, for subs go with JL W0 great speakers. They make a 3 10" box for $400 and that this is great, i mean amazing. It can get really loud, but still sounds good. For an amp, just get Like a little 50 or 75 watt by two and bridge it to run the subs, it will work sell, because you sould be able to get an amp that will put out about 250-300 watts bridged, and that is plenty of power for the subs and it will still be loud. I would run the speakers off of deck power, the kenwoods sound great off of deck power. And a good amp will run around $300.

So lets say deck at $300 + Speakers, 2 pairs at $200 a piece thats $400 + the Subs at $400 + the Amp at $300 your looking at about $1600, you can do a little better on the subs, if you go with two 8" W0's instead.

This would be a kick ass system for the money, and you will love it. It will not be as nice as the other system i suggested but that is really pricey, this one will do you well and i am sure you will have a lot of fun with it.
 

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i can understand why you wanted to replace the head unit if you have DSP, but if they don't why not, i have seen it done very well.

The wires are the weakest link in any audio system, that is a fact, you need to send the "sound" from a source i.e. Headunit, to the speakers or amp. I know you won't beleive me because the guys at BMW say their wires are really good, well that may be true for a factory car, but in general they are not that good, most of the wires are small and to not carry enough current through them.

Wires are the Weakest Link in any audio system.

If you are spending the money on a really nice system then invest the extra money into the wires, it will make a huge differnce in the sound. For the $1500 system i discribed i would not change all the wires, just get the best ones you can afford for you amp and the speakers wires from amp to subs. That is it, don't change all the wires in the car.

Once again the factory head unit maybe made by alpine and be good for factory. But getting an aftermarket headunit will give more options, like a repeat button for the cd player, i don't know if the factory one does but most of them don't. You will also get more options to control the sound, with a sub control, bass, treble (yes, most car audio stereos have Bass and treble control) but you also get Mid level control, this is a great control, it will really bring out the sound and will help keep the speakers longer, an aftermaket head unit also gives out more power, say 50 x 4 as unlike a factory even the Alpine is only like 20 x 4, more power better sound.

These are just the facts go to any audio shop and they will tell you the same.
 

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AK did you not read a thing i posted

I said an 8" has more natrual sounding bass than a larger sub, once again this is a fact, a 10" will give very good sound even a 12 will, but not as good of sound as the same speaker in an 8" form, yes if you want SPL then go with a 12" if you want SQ go with the 8".

For Hard Rock music a Free air sub does do well, the best for Rock is a Sealed box, because this will give a tighter sounding bass, it will also be a little deeper sounding than the free air. If you want the loudest box get a Banpass they rock for SPL, but if you want sound quality go with a sealed or a free air. :thumb:
 

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I miss wrote the first line i ment to say i can understand why you would not want to replace. That was my bad.

First let me say that i am an audiophile, i have a dream home system and a great car system, i have installed many car audio systems. I know stereos.

I never said that the stock stereo in the BMW was BAD, some one wanted advise on the subject so i gave recomendations. That is it. The best sounding stock system in any car is the Mark Levinson in the Lexus, it rocks for stock, but it can still be upgraded. I know a lot of aftermarket stereos are all flash, that i why i use an older RockfordFosgate, they look like nothing but are amazing stereos. and some people really like all the flash, that is why they call it ICE.

I know that the speakers suck, and are the weak point, but if you would read a little closer i said that when you put all the money into a nice system the wires are the weak link.:thumb:. you can not hook the speakers right up to the cd player, the sound has to travel distence, which will kill the orginal sound, to the speakers. the more effective and more effeicent the wires get the sound there the better the sound, i don't understand how you can not understand this. It is basic stereo knowledge.

I know any shop will tell you what you want to hear to get the sale. I am in Marketing i think i know this very well. AND I KNOW THAT IS A FACT.

I said that a free air system would be good, this is because of the sealed trunk, it acts like a big box, and it is cheap. But when listening hard rock music a small sealed box will work better with the music because of the fast beat. In the free air the box (created by the trunk) is to large and the soundwaves are going to interfere with each other because of the fast beat. THAT IS ANOTHER FACT. If you listen to classical, Jazz, Rap, Country and all the other, a free air systems like yours will sound just as good. It will sound really good with rap because of all the air and space in the trunk.

How many volts is your amp getting?

I understand you with the exposed wires, i don't care much about that either, unless the car is in a show.

I did not mean you get you all hot headed about this, i was just making a suggestion, calm down. IF YOU THINK YOUR SYSTEM F****** ROCKS THEN THAT IS ALL THAT MATTERS. Make youself happy first. for my self i am anal about it. I will change evey thing in any car, no matter what do make it sound better. even the wires. Sorry if i like good sound and enjoy this stuff. I was never saying that your system sucks, never once did i say that. All i was doing was giving advice to some one you needed help.
 
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