Stereo upgrade - Pontiac G8 Forum: G8 Forums - G8Board.com
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post #1 of 15 (permalink) Old 01-22-2018, 07:57 PM Thread Starter
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Stereo upgrade

Any suggestions for speakers (maybe and amp) and a stereo I can use with Blu-tooth? Is the stock amp (if there is one) any good? Or does the head unit power the front door, rear door and dash speakers?


Paul Jarrett
08 G8 GT
Parker, CO

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post #2 of 15 (permalink) Old 01-22-2018, 08:14 PM
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Quote:
Originally Posted by 56belair View Post
Any suggestions for speakers (maybe and amp) and a stereo I can use with Blu-tooth? Is the stock amp (if there is one) any good? Or does the head unit power the front door, rear door and dash speakers?


Paul Jarrett
08 G8 GT
Parker, CO
I have the g8 Design kit with a Pioneer Double DIN 42 0 1 It has android auto I love it

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post #3 of 15 (permalink) Old 01-22-2018, 08:33 PM Thread Starter
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Crutchfield suggested

Clarion Xc1410 amp
INFINITY REF-6522EX 6.5" speakers
JL AUDIO C2-600 6" speakers

They didn't suggest a 6x9. Can someone verify if the rear speakers are 6x9?

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post #4 of 15 (permalink) Old 01-22-2018, 08:38 PM
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Quote:
Originally Posted by 56belair View Post
Crutchfield suggested

Clarion Xc1410 amp
INFINITY REF-6522EX 6.5" speakers
JL AUDIO C2-600 6" speakers

They didn't suggest a 6x9. Can someone verify if the rear speakers are 6x9?
It's 2. 8 inch

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post #5 of 15 (permalink) Old 01-22-2018, 11:20 PM
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I was thinking all the door speakers were 6.25”. The rear deck speakers are 8".

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post #6 of 15 (permalink) Old 01-22-2018, 11:23 PM Thread Starter
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Can someone verify a total count of speakers for me?

2xdash
4xdoor
2xrear deck?
__________=
8

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post #7 of 15 (permalink) Old 01-23-2018, 08:11 AM
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3 dash.
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post #8 of 15 (permalink) Old 01-23-2018, 08:18 AM
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Quote:
Originally Posted by 56belair View Post
Can someone verify a total count of speakers for me?

2xdash
4xdoor
2xrear deck?
__________=
8
3xdash, one center channel, two tweeters
4xdoor 6 1/2 in all 4 spots.
2xrear deck, 8 inch woofers.

Recommend starting with the door speakers and the resistor mod on the center speaker (to tone it down).

Matt Jones
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post #9 of 15 (permalink) Old 01-24-2018, 01:29 PM
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It depends on how deep you want to get into it. I would think for most people, some quality drop-ins, tone down or remove the center speaker and some sound deadening to the doors and such would give you a big jump in sound quality. If you want more than that, you're looking at some dedicated amps to drive those fancy new speakers, a rear sub and a digital sound processor to do it right.
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post #10 of 15 (permalink) Old 01-24-2018, 01:54 PM
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If you upgrade your Subs you need to invest in an amp. As it is now, any aftermarket sub is going to be under powered by the factory amp. The 2x40W channels are perfect for the factory subs, but providing 40W to a 250W woofer, for example, is just risking damage to the cones. So a decent monoblock amp will do the trick for just the subs if you were to replace them.

The Amp that Crutchfield recommended is based on what you want, but personally I didn't like the looks of any of those bluetooth amps.

I went with the DB+ series speakers (6502s up front, and 652s in the back). Then I got two of their 8" DVC Subs. I'm still in the selection process for Amps.

What most folks I've talked to have told me is that I shouldn't waste my money on a DSP unless I am super serious into audio. A good amp has filtering, and the power will provide the clarity you want. You can always add a DSP later with a good amp set-up.

Most will be satisfied with speaker upgrades and a reasonable amp to complement it without breaking the bank, which is what they recommended. If you go for subs, though.... Like I said, get a proper amp for them. Otherwise, you'll be posting a "why did my subs blow" thread later on.

Crutchfield's website has a ridiculous amount of information to help you make up your mind.

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post #11 of 15 (permalink) Old 01-26-2018, 05:07 PM
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post #12 of 15 (permalink) Old 02-04-2018, 03:49 PM Thread Starter
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I decided I will keep the stock stereo deck and use the 1/8" input jack to connect to my phone

Where is the amplifier located?

If I buy component speakers for the front door, how do I incorporate a 3rd tweeter in the the dash? Perhaps leave it out of the solution?

It it possible to keep the stock door speakers and tweeters, upgrade the amp with noticeable sound quality? Are replacement speakers a must?

I'd love to replace the rear deck 8" subs with aftermarket speakers and power them with their own amp. How can you control the volume of two amplifiers with a stock deck?

Any wiring diagrams available?

Paul
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2008 G8 GT
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post #13 of 15 (permalink) Old 02-05-2018, 04:55 PM
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The amplifier for most of the speakers is in the head unit and it will probably be adequate for your new door speakers.

If you have the rear deck subwoofers, the wimpy little amplifier for them is in the trunk. That amplifier should be replaced.

You don't want a third tweeter in the dash. The center speaker is full range. See the "Center speaker resistor mod" which is linked from the Sticky that I posted earlier.

The subwoofer amp taps off of the rear speaker wires. If you wire your new amp the same way, you just set it's level once and forget it.

I think wiring diagrams are also listed in that Sticky. If not, they're in the service manuals. Which were available from Helm Inc the last time I looked.

Read the Sticky, OK? It will answer your next dozen questions.

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post #14 of 15 (permalink) Old 02-05-2018, 06:06 PM
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Upgrading to a Holden IQ is also a possibility. There are a handful of businesses in Oz that will program the radio to your VIN and include all of the trim. A friend of mine on the board received got the base IQ and paid $900 shipped. I got mine with the gauges for $1500. PM me if you want the information as the guy I dealt with is not a vendor on here.

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post #15 of 15 (permalink) Unread Yesterday, 09:35 PM
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Any suggestions on where to mount the line out converter that connects to the stock stereo using the Metra connector? Is the line out converter something that gets tucked away in your dash?
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