Audio/Electronics Stereo System Installation Info, Amplifiers, Subwoofers, Radar Detectors, Police Scanners, and CB Radios for the Corvette
Sponsored by:
Sponsored by: Innova

Inconsistent amp operation

Thread Tools
 
Search this Thread
 
Old Mar 28, 2023 | 10:01 AM
  #1  
jaki30's Avatar
jaki30
Thread Starter
Safety Car
Veteran: Navy
20 Year Member
Conversation Starter
Liked
 
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Default Inconsistent amp operation

Just picked up a 2013GS.
Car came with an Alpine iLX 650 head unit and a JL audio X-ray 500/2v/ 3 amp.
Also there are two crossover JL units in the system.
My problem is after starting the car, the amp may or may not turn on.
When it doesn’t, I get low volume out of the two rear speakers only.
When it does turn on, the volume is very loud.
The Alpine volume control does work for both cases.
Unsure why it doesn’t consistently turn on.
Any thoughts?
System appears to have been professionally installed.
Not too savvy with these audio systems. When I grew up, the
trick was to a speaker in the rear and use a fader potentiometer to control output.
Reply
Old Mar 28, 2023 | 10:44 AM
  #2  
madsonp's Avatar
madsonp
Le Mans Master
Supporting Member
Liked
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2017
Posts: 5,424
Likes: 2,304
From: Billings Montana. Out in the wild west
Default

Originally Posted by jaki30
Just picked up a 2013GS.
Car came with an Alpine iLX 650 head unit and a JL audio X-ray 500/2v/ 3 amp.
Also there are two crossover JL units in the system.
My problem is after starting the car, the amp may or may not turn on.
When it doesn’t, I get low volume out of the two rear speakers only.
When it does turn on, the volume is very loud.
The Alpine volume control does work for both cases.
Unsure why it doesn’t consistently turn on.
Any thoughts?
System appears to have been professionally installed.
Not too savvy with these audio systems. When I grew up, the
trick was to a speaker in the rear and use a fader potentiometer to control output.
Do you know if there's an interface installed with your system, and if so which one ? The interface should have an amp turn on circuit that sends a signal to the amp to turn it on, could be you have a loose connection on this circuit either at the interface, or the amp.
Reply
Old Apr 14, 2023 | 07:18 PM
  #3  
jaki30's Avatar
jaki30
Thread Starter
Safety Car
Veteran: Navy
20 Year Member
Conversation Starter
Liked
 
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Default

Status: Found a bad ground connection at the battery.
Installer ran ground and positive from the battery clamp
studs. The oversize terminals are hard to get tight and stay
tiight.
Reply
Old Apr 14, 2023 | 09:12 PM
  #4  
madsonp's Avatar
madsonp
Le Mans Master
Supporting Member
Liked
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2017
Posts: 5,424
Likes: 2,304
From: Billings Montana. Out in the wild west
Default

Originally Posted by jaki30
Status: Found a bad ground connection at the battery.
Installer ran ground and positive from the battery clamp
studs. The oversize terminals are hard to get tight and stay
tiight.
Connecting to the battery terminals isn't really a good idea for that reason, when you ground an amp, ideally you want to ground it as close to the amp as possible at a good chassis ground point. As for the positive cable, I suggest connecting it to the positive terminal of the under hood fuse box, it's a much more secure connection point, shown here. The cable shown in the picture with the red tape is my amps positive cable.


Reply
Old Apr 16, 2023 | 11:47 AM
  #5  
jaki30's Avatar
jaki30
Thread Starter
Safety Car
Veteran: Navy
20 Year Member
Conversation Starter
Liked
 
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Default

madsonp,
Thanks. Just did the positive cable as in your picture.
Trying to find the ground that is supposed to be on the passenger side behind the seat.
Can't figure how to get the trim panels off.
Searching the net.
Reply
Old Apr 16, 2023 | 12:09 PM
  #6  
madsonp's Avatar
madsonp
Le Mans Master
Supporting Member
Liked
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2017
Posts: 5,424
Likes: 2,304
From: Billings Montana. Out in the wild west
Default

Originally Posted by jaki30
madsonp,
Thanks. Just did the positive cable as in your picture.
Trying to find the ground that is supposed to be on the passenger side behind the seat.
Can't figure how to get the trim panels off.
Searching the net.
Yeah I can't really say about the coupe, on my vert there's a good grounding point behind the water fall where the stock XM tuner was, I removed the tuner and mounted my amp in it's place and grounded it right there, but like I say, that's on my vert.
Reply
Old Apr 16, 2023 | 12:47 PM
  #7  
jaki30's Avatar
jaki30
Thread Starter
Safety Car
Veteran: Navy
20 Year Member
Conversation Starter
Liked
 
Joined: May 2006
Posts: 3,732
Likes: 708
From: Shelton, Connecticut
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Default

What year is your vert?
My 2013 GS vert has what appears to be a heavy duty sheet metal hex head screw with one ground
wire attached . It appears to be factory from the wire and terminal that is cripmed to it.
Reply
Old Apr 16, 2023 | 05:18 PM
  #8  
madsonp's Avatar
madsonp
Le Mans Master
Supporting Member
Liked
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2017
Posts: 5,424
Likes: 2,304
From: Billings Montana. Out in the wild west
Default

Originally Posted by jaki30
What year is your vert?
My 2013 GS vert has what appears to be a heavy duty sheet metal hex head screw with one ground
wire attached . It appears to be factory from the wire and terminal that is cripmed to it.
Mine's an 05, I'd say try the one you found, if somethings already grounded to it, you should be good. Just be sure there's no corrosion or paint on it.
Reply

Get notified of new replies

To Inconsistent amp operation

Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

 Michael S. Palmer
story-1

Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

 Joe Kucinski
story-2

150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

 Joe Kucinski
story-3

8 Coolest Corvette Pace Cars (and Replicas) of All Time

 Verdad Gallardo
story-4

Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

 Joe Kucinski
story-5

Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

 Verdad Gallardo
story-6

Top 10 Corvettes Coming to Mecum Indy 2026!

 Brett Foote
story-7

Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

 Michael S. Palmer
story-8

10 Revolutionary 'Corvette Firsts' Most People Don't Know

 Joe Kucinski
story-9

5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

 Michael S. Palmer




All times are GMT -4. The time now is 10:38 PM.

story-0
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!

Slideshow: How to Protect A Convertible Top: 10 DOs & DON'Ts

By Michael S. Palmer | 2026-04-03 00:00:00


VIEW MORE
story-1
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!

Slideshow: The 10 most explosive Corvettes ever built based on power-to-weight ratio.

By Joe Kucinski | 2026-05-20 07:23:03


VIEW MORE
story-2
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter

Slideshow: From C1 to C8 we compare every Corvette generation by the numbers.

By Joe Kucinski | 2026-05-12 16:54:12


VIEW MORE
story-3
8 Coolest Corvette Pace Cars (and Replicas) of All Time

Slideshow: Some Corvette pace cars became collectible legends, while others perfectly captured the look and attitude of their era.

By Verdad Gallardo | 2026-05-11 09:50:51


VIEW MORE
story-4
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)

Slideshow: Ranking the top 10 Corvette engines by torque output.

By Joe Kucinski | 2026-05-05 11:58:09


VIEW MORE
story-5
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!

Slideshow: A Corvette pace car nearly matching IndyCar speeds sounds exaggerated, until you look at the numbers.

By Verdad Gallardo | 2026-05-04 20:03:36


VIEW MORE
story-6
Top 10 Corvettes Coming to Mecum Indy 2026!

Among a rather large group of them.

By Brett Foote | 2026-05-04 13:56:44


VIEW MORE
story-7
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!

Slideshow: the top 10 things Corvette owners want in the C9 Corvette

By Michael S. Palmer | 2026-04-30 12:41:15


VIEW MORE
story-8
10 Revolutionary 'Corvette Firsts' Most People Don't Know

Slideshow: 10 Important Corvette 'firsts' that every fan should know.

By Joe Kucinski | 2026-04-29 17:02:16


VIEW MORE
story-9
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2

Slideshow: Should you buy a 2020-2026 Corvette or wait for 2027?

By Michael S. Palmer | 2026-04-22 10:08:58


VIEW MORE