aftermarket stereo system help

[6.2Frank]

The LC8i could be the solution due to this feature as it would allow you to use front and back inputs and regulate the front pair level.

Level Matching Controls

Your LC8

i

has level controls for each pair of channels. These controls

allow you to adjust the signal level from your factory-installed amplifier

or source unit to match up with your after-market amplifier or processor.

The Auxiliary input also has a level-matching control to balance it with

the main inputs.

http://www.audiocontrol.com/downloads/car/current/lc8i/lc8i-user-manual.pdf

Now the only thing factory that still is in the truck is the Headunit, the tweeters and all the speakers have been swapped out for Alpine Type S speakers. Would this have any effect on the LC8i?

[crewl1]

Now the only thing factory that still is in the truck is the Headunit, the tweeters and all the speakers have been swapped out for Alpine Type S speakers. Would this have any effect on the LC8i?

I think that is exactly the point of the LC8i.

It serves to take the output from your factory head unit (in this case the Bose amp outputs) and then convert it so it can be used effectively by the aftermarket amps to power the aftermarket speakers.

[6.2Frank]

I think that is exactly the point of the LC8i.

It serves to take the output from your factory head unit (in this case the Bose amp outputs) and then convert it so it can be used effectively by the aftermarket amps to power the aftermarket speakers.

Ok so that would help with the chimes, Bluetooth audio, hands free audio, and onstar issues? I mean the place told they can restore all the sounds but it'd be extremely loud due to the amp.

[Strykers_Inc]

Ok so that would help with the chimes, Bluetooth audio, hands free audio, and onstar issues? I mean the place told they can restore all the sounds but it'd be extremely loud due to the amp.

Using the Audiocontrol LC8i most likely will not change the volume of the chimes, especially if your getting the output from the Bose amp. The LC8i will sum channels in order to get a full range signal, and will sum the channel including the chime signal. This will effectively put chimes in all speakers. in order to get a full range signal, the front dash speakers, front door speakers and the sub signal are required. The bose amplifier has already separated the signals from full range to each speaker. Mosconi solved this issue with allowing % of signals to be used for select outputs.....reason being I am using a Mosconi, and will still be using one after I install the Alpine X110-SRA

[crewl1]

Personally I have not installed using an lc8i but in theory and looking at the manual it should allow you to control the level of input from the left front speaker to the amp and combine it with the other inputs to the aftermarket amp.
You can suggest it to the shop and see what they say.

 

It is true that if they just use the straight front speaker source to your amp the sounds will get loud.
I do think they should have mentioned this might happen before doing the install and let you decide rather than just take the sounds out completely.

 

Adding the speaker off the factory outputs may do the trick as well

[crewl1]

Using the Audiocontrol LC8i most likely will not change the volume of the chimes, especially if your getting the output from the Bose amp. The LC8i will sum channels in order to get a full range signal, and will sum the channel including the chime signal. This will effectively put chimes in all speakers. in order to get a full range signal, the front dash speakers, front door speakers and the sub signal are required. The bose amplifier has already separated the signals from full range to each speaker. Mosconi solved this issue with allowing % of signals to be used for select outputs.....reason being I am using a Mosconi, and will still be using one after I install the Alpine X110-SRA

The Mosconi unit feature sounds like a better solution than the LC8i that only allows level by pair vs individual input.

 

I believe the Bose Amp actually has full range signal off the front doors, so there is really no need to sum dash+door+sub to get a full range out. AFAIK.

Going off this post:

http://www.diymobileaudio.com/forum/build-logs-project-install-gallery/159994-2014-chevy-silverado-musicar-northwest.html

[Strykers_Inc]

The Mosconi unit feature sounds like a better solution than the LC8i that only allows level by pair vs individual input.

 

I believe the Bose Amp actually has full range signal off the front doors, so there is really no need to sum dash+door+sub to get a full range out. AFAIK.

Going off this post:

http://www.diymobileaudio.com/forum/build-logs-project-install-gallery/159994-2014-chevy-silverado-musicar-northwest.html

 

The signals coming from the doors do not reach 20K....... they are purely midrange.....you will need the dash speaker signal in order to get the full range....the pictures you linked to I posted a while back, the dash signal was measured at 15khz, while the door speakers were measured at 50hz.....

[crewl1]

Racinghart user posted the following diagram of the Bose wiring output (UQG.)

Is it incorrect?

According to this diagram the front signal is full range, then gets split off to the dash, assume with a capacitor to cutoff the lows.

If what you are saying is true , then the Bose would have to be sending out an entirely separate set of outputs to the dash.

 

[Strykers_Inc]

Racinghart user posted the following diagram of the Bose wiring output (UQG.)

Is it incorrect?

According to this diagram the front signal is full range, then gets split off to the dash, assume with a capacitor to cutoff the lows.

If what you are saying is true , then the Bose would have to be sending out an entirely separate set of outputs to the dash.

 

 

 

I see your point in referencing the schematic.

 

After working with my system, I can assure you that something doesn't seem correct with that schematic. The color codes do not match mine. In example, it shows that both the front dash and the front doors are using the same color coded wire. This is not correct. The outputs for the amp are as shown in my reference attached.

 

If you want to go with that schematic, then this leaves you with two options, no chimes, or with chimes. See my point?

 

Alpine head units with iDatalink Maestro utilize a separate small speaker for chimes, but are also not compatible with Bose from my understanding. The chimes originate before the Bose amplifier, and for some reason are not amplified by the Bose amplifier.

 

2014 GMC Sierra Bose Amplifier Line Out:

(NOTE: This should be correct as far as POS/NEG, I only had my first draft from on my phone to post this)

 

1st HARNESS SUB (POS+) Blue/gray

(NEG-) Grey/black

 

 

FRONT RIGHT DOOR (POS+) Yellow

(NEG-) Yellow/black

 

 

FRONT LEFT DOOR (POS+) Blue/black

(NEG-) Brown/blue

 

 

2nd HARNESS REAR RIGHT DOOR (POS+) White

(NEG-) Blue/black

 

 

REAR LEFT DOOR (POS+) Green

(NEG-) Green/black

 

 

FRONT RIGHT DASH (POS+) Brown/green

(NEG-) Brown/purple

 

 

FRONT LEFT DASH (POS+) Yellow/blue

(NEG-) Yellow/gray

 

 

 

 

 

[6.2Frank]

Well here's an update, I took the truck in and basically what they was install the speaker in the dash and that is being powered by the bose amp, but the volume is low for bluetooth audio and the chimes. He told me its all because of the magnet size and the bose magnet were pretty small to begin with and didn't require much power and the speaker they used has a bigger magnet and that's all they can find so we figured out that if we had another speaker that we threw under the passenger side of the dash the audio quality would be better when it came to the chimes and bluetooth/onstar audio would be better. And that left us the those whole lack of power to power the 2 speakers since the Bose amp is short of that, so I threw out the idea if we get another amp to power the bose amp to power the speaker if that would work and he said that it will and shouldn't be an issue as long as the amp is a 200watt amp. So we'll see how it'll work out, i'm not paying for this the place stereo place is paying for the equipment since they didn't warn me about anything so lets see.

[AZ_SS]

Would the non-Bose system have the same problem?