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Discussion Starter · #1 ·
Has anybody found out what speaker sizes and mounting depths are used in the 14-15 Impala's (Front Doors, Rear Doors, Rear Deck ?

I have looked online and found nothing. Crutchfield and Sonic Eletronix have no info for these vehicles.
 

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Discussion Starter · #4 ·
Any chance you could post a picture if it is not too late. 6x9's are pretty large for a door are you sure they are not 5x7 or 4x6 ?
 

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Not many options plus I wouldn't recommend it for these reasons.
Installation Details for your 2015 Chevrolet Impala Sedan without Bose system; With 8" LCD Radio


  • This item fits your vehicle
  • Use the factory speaker grilles.
  • Replacing the factory low-impedance (1-ohm or 2-ohm) factory speaker with a higher-impedance speaker will often result in lower volume levels.
  • A speaker adapter bracket is required, and it's included free with your speaker purchase.
  • You'll need to re-drill the mounting screw holes.
  • A wiring harness is not available. You'll have to cut off the factory connectors and splice the vehicle's speaker wires to your new speaker wires.
 

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Been researching this myself. First, Crutchfield is pretty useless for gen 9, so don't expect much love there...

Here's what I've found as it pertains to the upgraded factory "premium" MyLink system, and the Bose premium stereo. I don't know what the lowest stock model stereo has.

Dash- two 2&1/2 in. tweeters, L and R
Front doors- one 6x9 in. woofer in each door
Rear doors- one 5&1/4 in. "wide range" coaxial speaker in each door

These speakers are powered by a "Bose" labeled amplifier located on the right side of the trunk behind the trunk liner. (I know because that's what mine has, and couldn't believe it, kinda...)

The "actual" Bose system, besides having marginally better speakers than those listed above adds:

One 3&1/2 in. center channel speaker in the center of the dash
two- 6x9 woofers in the rear deck
two-2&1/2 in. tweeters in the rear deck

... bringing the total to 11 speakers for the Bose system. There is NO single, dedicated subwoofer, contrary to popular belief (or dis-belief). Instead, the 6x9s in the front doors and (if equipped) rear deck provide the bass.

The Bose system also includes "active" noise cancellation via in-cabin microphones, as well as a more extensive equalization set; 10 band, as opposed to "Treble, Mid, Bass" in the MyLink premium head unit.

I just added a Kicker pt250 bass station to my stock set up, and it rounds things out really well. I might get around to swapping door speakers some day, but am pretty happy so far.

Lastly, the only reason I said Crutchfield was "useless" is that for 15s anyhow, they only list 3 products as compatible with our cars, digital signal processors that run from $650- $1100, and they only list 6&1/2 and 6&3/4 round two and three way speakers for the doors. It doesn't give me much confidence in their mastersheet until they get a few more 9 gens cracked open.

Hopefully this info helps!
 

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It is very strange that the front doors have 6x9" speakers - don't think I've ever seen a car with 6x9's in the front doors! They are always round speakers - usually 5.25, 6.5" or 6.75". Usually space is tight, which is why 6x9's are very uncommon in the front doors (at least in regards to GMs).

Have you actually seen the 6x9's in the doors? Just wondering where you saw that at. It really surprises me.

But then again, it's also VERY unusual for a a car not to have "rear deck" speakers too (that is usually where the 6x9's go).

Very strange speaker setup....

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Have you actually seen the 6x9's in the doors? Just wondering where you saw that at. It really surprises me.

But then again, it's also VERY unusual for a a car not to have "rear deck" speakers too (that is usually where the 6x9's go).

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Hehe, yup, I've seen them. Shined a flashlight through the speaker grilles in the doors, and the dimensions were originally provided to someone on a different forum directly from Bose... (GM wouldn't reply)

As for the rear deck speakers, well, amongst automotive audiophiles, the current hip wisdom is that only subs belong in the rear of the car, rear door speakers are only good for "fill", not crucial to sound, yadda yadda, and only component speakers, magically imbued with sweat from Japanese and German folks in lab coats, as well as 4-digit power amps will provide a marginally adequate listening experience... (I kid, but only slightly)

Pretty much felt the same way you do when I figured it out. What was really funny to me was having a Bose amp in a non-Bose system.
 

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Yeah, apparently, having no speakers in the back of the car is all the rage now! Personally, I don't understand it. Maybe it's because I'm just old fashioned and set it my ways, but I actually fade my sound to the *rear* a little! I tried fading all of the sound to the front speakers and absolutely hated it - I just have to have that sound coming from the back as well to truly sound good to me...

Although, I will admit, I only have a 45Wx4 RMS amp connected to my Rosen OEM-look, DVD/navigation head-unit with no subs and it's still way too much power with more than enough bass for me! So that will probably tell you something right there! :)

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Discussion Starter · #10 ·
The Bose system also includes "active" noise cancellation via in-cabin microphones, as well as a more extensive equalization set; 10 band, as opposed to "Treble, Mid, Bass" in the MyLink premium head unit.
It is my understanding that the Active Noise Cancellation is in the 4Cyl version only. The 10 Band EQ is news to me as well. I have Bose system in the V6 LTZ and there is only Treble, Mid & Bass.
 

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It is my understanding that the Active Noise Cancellation is in the 4Cyl version only. The 10 Band EQ is news to me as well. I have Bose system in the V6 LTZ and there is only Treble, Mid & Bass.
I was taking that from the Bose info sent to a member on a different forum... I wonder if they aren't referring to eq presets? Mine has 5 or 6 plus "custom".

Anyhow, here's the link to the thread at the Chevrolet forum, in the Impala section:Bose® Centerpoint® Surround Sound Premium 11-Speaker System Specs? - Chevrolet Forum - Chevy Enthusiasts Forums

Hope that helps!
 

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Bose...like that means "good" anymore....still better than stock I guess.

one issue with my bose system in my 12' malipoo, was that the speakers had FOUR wires going to one plug on the speaker--the tweeter and "woofer" were on separate wires. I did not mess with them...
 

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Bose...like that means "good" anymore....still better than stock I guess.

one issue with my bose system in my 12' malipoo, was that the speakers had FOUR wires going to one plug on the speaker--the tweeter and "woofer" were on separate wires. I did not mess with them...
That must be for the rear deck speakers, right?

What I've found is that each type of speaker has its own pos and neg wire, but the rear deck speakers are referred to as an "assembly", so they likely share a common harness connector.

In mine, adding a powered sub, I only had to splice into the front door speakers, since they are the only bass-dedicated speakers in the car. I kinda wonder if my amp puts out voltage to non-used harness connections though. Hmmm...
 

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Just an FYI if you have the Bose Centerpoint Surround Sound System in your 2014-15 Impala (per Bose).


11 HIGH-PERFORMANCE SPEAKERS
1 Two 2.5-inch (60mm) Twiddler® mid/highrange speakers, one on each side of the
instrument panel.
2 One 3.5-inch (90mm) mid/high-range
speaker in the center of the instrument panel.
3 Two 6 x 9-inch (150 x 230mm) woofers, one in
each front door.
4 Two 5.25-inch (130mm) wide-range speakers,
one in each rear door.
5 Two 6 x 9-inch (150 x 230mm) woofers with
two 2.5-inch (60mm) Twiddler mid/highrange speakers in an integrated assembly in
the rear deck.
SYSTEM ELECTRONICS
6 A Bose digital amplifier mounted in the right
side of the trunk, with 10 channels of custom
equalization and digital signal processing.


 

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Replaced the entire set of speakers today in a 2016 Impala. Alpine 6x9's in the front doors and the rear deck. And 6.5" in the rear doors. Added a 4 channel amp and lost all almost all bass. The factory speakers and Delco amp actually sounded way better. Going to have to install subwoofers in the trunk just to not hate the sound now.

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Replaced the entire set of speakers today in a 2016 Impala. Alpine 6x9's in the front doors and the rear deck. And 6.5" in the rear doors. Added a 4 channel amp and lost all almost all bass. The factory speakers and Delco amp actually sounded way better. Going to have to install subwoofers in the trunk just to not hate the sound now.
What trim level Impala do you have (LT, LTZ) ?, Does it have the Bose System ? If so, the factory head unit is made to utilize the Bose Amp and Bose makes some quirky stuff, with bizarre equalization and odd impedance levels that only seem to work good with their amps and sound like crap with anything else. What kind of Amp did you use ? I once owned a Mazda 3 with a Bose system, I changed the Speakers to Infinity and it sounded worse than stock. I ended up changing the whole head unit to a Pioneer touch screen unit with a Pioneer 4ch Amp and it was a night and day difference.

The problem with the 2014-2016 Impala's is that the head unit is a big problem to change because of system integration and the proprietary screen in the dash. You may find that it is the GM Factort headunit that is not playing well with the new components. Based on the speakers you installed and provided you used a decient Amp, you should get good bass just from what you have now, plus a Sub will not fix the missing mid bass that should be there with the door and deck speakers.
 
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