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Old 03-22-2011, 09:27 PM   #1 (permalink)
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8th Gen audio question

I recently bought some goodies to add some better sound to my new 09 LT, and after talking with Best Buy installers, getting quotes, etc, I scheduled to have the install done.

I don't have the time, and am just lazy during the winter......

So we settle on what materials i need to get:

LC7i audio processor (to keep factory deck)
Alpine 12" Type R
Alpine MRP-1000 - for type R
Alpine MRP-300 - for the factory fronts and rears
many feet of 0 gauge and 2 gauge power wire
power distribution block
3 sets of Monster Cable RCA cables
Fuses

So after having purchased all this, and having my car in their install bay a *few* times, I show up at my appointment, and the installer looks in the truck at one of the factory speakers. He then begins to explain that the factory speakers are 8-Ohm, thus requiring me to purchase new speakers, since standard car audio is all based on 4-Ohm speakers.

So I'm a little more than pissed off that he
A. is retarded and somehow didn't see this on one of the previous 3 trips, or
B. is an jerk, and is just trying to get me to buy crap that I don't really need...

I have done many car installs over the years, but never once, have I come across a mobile audio system based on 8-Ohm speakers.....

Now somebody told me it could be a Bose system, but i thought those only came on the cars equipped with the OnStar feature?

Is this the standard for GM now? I did get under there and look, and the magnet of the factory 6x9 is stamped 8-Ohm....

I wasn't quite ready to dump another $300-400 for front and rear speakers just yet...

Any input is appreciated.

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2008 Impala SS
MagnaFlow cat-back exhaust
JL Audio components up front
15" Kicker L7 in the back
Alpine MRP-F300 & Alpine MRP-1000 for power
Audio Controls LC7 to make it all work!
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Old 03-23-2011, 05:05 AM   #2 (permalink)
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Sorry, I'm having trouble understanding the question. From what I understand you want to use the Alpine amp on the factory speakers? and you have already verified that your speakers are 8 ohm, but the guy is telling you theyre 4? is that right? also I dont think you need any 0 guage for 1300 watts. i may be wrong though, but i know 0awg is pretty costly, and not worth it if you dont need it

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Old 03-23-2011, 05:07 AM   #3 (permalink)
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ohhh is he saying the Alpine amp wont work with 8 ohm speakers? if thats the case I would look up the specs on the amp. mrp m300 is probably 300rms at 4ohms, just guessing. and are you using the mrp-m1000 for just one type r?

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Old 03-23-2011, 07:49 AM   #4 (permalink)
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I was curious if all the new impalas run 8-ohm based audio, and whether or not using my alpine MRP-300 with the 8-ohm speakers will trash it? Yes, i am running the single Type-R off the monoblock MRP-1000.

I am using 0 and 2 Gauge power becuase I plan on adding a second MRP-300 to bridge them both. one for fronts and one for rears. I am looking at the type-r component 6.5 speakers for the fronts, and those will eat up a MRP-300 bridged by themselves

I actually saved a bundle by purchasing my power wire from a welding shop, Pure copper, high strand count and heavy duty insulation make this wire a great choice for running audio component power. Purchasing all this, was cheaper than buying 4 & 8gauge from the audio supply stores :)

If running those 8-ohm speakers from my 4-ohm designed amp wont hurt anything, then I will just continue with my current plan. Otherwise, looks like i'm waiting till I purchase new front and rear speakers....

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2008 Impala SS
MagnaFlow cat-back exhaust
JL Audio components up front
15" Kicker L7 in the back
Alpine MRP-F300 & Alpine MRP-1000 for power
Audio Controls LC7 to make it all work!
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Old 03-23-2011, 08:42 AM   #5 (permalink)
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wow thats pretty cool about the wire. is it the newest type r thats 600 rms or the older one thats 500 rms? 4ohms dvc right? i wouldnt put 100rms to a 5 or 600 watt sub. and for the amp, no it wont hurt anything but the higher impedence will lessen the output of the amp significantly

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Old 03-23-2011, 09:43 AM   #6 (permalink)
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its the previous generation, according to what i have read online. The type-R is 4ohm DVC and is supposedly 600watt RMS. The amp puts out 1000 RMS, but I don't have to turn the gain all the way up... :) This just gives me room to add another type-r in the future.

I would rather have more than enough power and turn down the gain, then not have enough and be banging out massive distortion. Well, maybe i will just install everything the way it is, then add the new speakers when i have a little extra cash.

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2008 Impala SS
MagnaFlow cat-back exhaust
JL Audio components up front
15" Kicker L7 in the back
Alpine MRP-F300 & Alpine MRP-1000 for power
Audio Controls LC7 to make it all work!
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Old 03-23-2011, 09:45 AM   #7 (permalink)
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regarding the stock 8-ohm equipment... is this the new standard for GM? or ?

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2008 Impala SS
MagnaFlow cat-back exhaust
JL Audio components up front
15" Kicker L7 in the back
Alpine MRP-F300 & Alpine MRP-1000 for power
Audio Controls LC7 to make it all work!
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