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Old 10-31-2013, 03:56 PM   #1
Natban
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Aftermarket Speaker Siz, Amplification, Crossovers and Other Audio Things

I got in touch with another member about aftermarket equipment options. I wanted start this thread in case it might help others and possibly get some more input.

Hey rondogg.

I don't know how much experience you have with building car audio systems. I'm just a hobbyist who's been building and rebuilding my own system,s for about 10 years. The Basic system is going to be a 5 channel stereo system, front left, front right, rear left, rear right and a substage (maybe 2 channels if you want stereo bass but not a must 80hz and below). Even though the car 3 speakers in the front left channel it's important to note that each speaker is reproducing a certain range of frequencies (hz) and we don't have any hz being made by two different speakers. A car's cabin is probably one of the worst places to try to build a good sounding stereo but to overcome the size, mounting locations etc you're going to need a good bit of sound processing. So the Idea is to have the system capable of reproducing the full range of frequencies (roughly 20hz-20,000hz) at the same level (spl) and have them all reach the driver ears at the same time.

I'll post up pics tonight when I get home from work and the kids are done trick-or-treating (it's Halloween up here).

I'm re-using my system from my e36 it's about 4 years old. If I were starting anew and had all kinds of money I would be using a Head Unit like you've got and running the audio signals into a processing unit like this one PXA-H800. The Alpine unit uses their ImprintEQ which is what I'm getting good results with in my PXA-H100 processor. The PXA-H800 lets you adjust the eq after the auto tuning is complete which is where mine falls short. The processor would feed into two class D digital amps, one four channel (like 150Wx4) and a monster mono amp (1200Wx4). And from the amps to the speakers I'd probably stick with the passive crossovers I'm using on my full range speakers.

I've got to get back to work, I just wanted to get this thread started. So rondogg, post up what you car is and came with stock, what you have for it and what you want to get or what you are after.

Last edited by Natban; 10-31-2013 at 04:03 PM.
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Old 10-31-2013, 06:34 PM   #2
rondogg
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thanks heaps for that, i have a 323i e46, which i have had for 2 weeks, i have already put the eonon 5150D dvd player in and just need help on where to go next, i am going to buy section by section, what would you normally start with and what requires hours of work. all speakers can be put in with out me going into the dash again?? when buying the speakers, do i get the same size speakers? somebody that has upgraded please help me on this
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Old 11-02-2013, 12:44 PM   #3
Natban
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One plug & play solution for your speakers would be BSW. My replacements were very close to stock sizes, only the rear woofer was the wrong diameter but I still had to do atleast a bit of custom work for every speaker except the front mids. Maybe some one here can speak about the quality of the BSW speakers but they look like they have small magnets and a stamped sheet metal cage, not sure what materials are used for the cones and surrounds. If you hunt around on ebay and other places you'll be able to get a better deal.

Your BMW amp also has the crossovers integrated in it. So not only does it amplify the signal it also send s the proper frequencies to the proper speakers. Most of the time when when you buy a 2 or 3 way speaker system they come with passive crossover and an amp is just an amp with hi & low pass capabilities. Because of this it might make the most sense to buy & install speakers and amps at the same time. Then you can add a processor and subwoofer/amp afterwards.

Here's Some pics of my speaker install


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Old 11-02-2013, 12:54 PM   #4
Natban
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You'll probably need to go back into the dash to run RCA cable from the HU to the amp or processor. However some amps/processors can accept the line level speaker inputs, in that case you could access those wires in the trunk where they connect to the factory amp.
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Old 11-06-2013, 09:10 PM   #5
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If at all possible use the high level input. It will give you a better quality input to your amps over a low level (rca's)
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Old 11-07-2013, 06:54 AM   #6
StereoInstaller1
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Quote:
Originally Posted by TnT817 View Post
If at all possible use the high level input. It will give you a better quality input to your amps over a low level (rca's)
This advice is completely wrong, please ignore.
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Old 11-07-2013, 09:25 AM   #7
Natban
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Originally Posted by StereoInstaller1 View Post
This advice is completely wrong, please ignore.
I would have to agree with SI1.
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Old 11-07-2013, 12:03 PM   #8
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Originally Posted by Natban View Post
I would have to agree with SI1.
So completely wrong as to seem trollish, isn't it?
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