Stereo Power On THUMP
Thread Starter
Advanced
Joined: Aug 2004
Posts: 57
Likes: 0
From: Egg Harbor Township NJ
Stereo Power On THUMP
Anyone having a problem with the C5 Bose stereo giving you a power "thump" when the ignition is first turned on? This is happening even with the volume down. Most stereos have a power-on mute to avoid this surge.
Intermediate
Joined: Nov 2004
Posts: 49
Likes: 0
From: pittsburgh Pa
Thump
I agree it's probably a ground problem, Is it coming from all the speakers or Just one? If it's coming from all then it may be a radio ground issue if it's coming from one then possibly one of the amps my need a new ground. Hope this helps (This did fix my C4 but I just got a 04 C5 so no problems on the C5 yet)
Drifting
Joined: Oct 1999
Posts: 1,407
Likes: 0
From: Atlanta GA
Originally Posted by marksr
Anyone having a problem with the C5 Bose stereo giving you a power "thump" when the ignition is first turned on? This is happening even with the volume down. Most stereos have a power-on mute to avoid this surge.
Thread Starter
Advanced
Joined: Aug 2004
Posts: 57
Likes: 0
From: Egg Harbor Township NJ
I think it comes from all speakers, but not 100% sure. So can anyone tell me where the ground for the radio is? I had a hard enough time finding a good ground for my radar detector.
This is a 2004 with 2,000 miles on it. I will take it to the dealer at 7,500 if I can't resolve the issue. This didn't happen until recently.
This is a 2004 with 2,000 miles on it. I will take it to the dealer at 7,500 if I can't resolve the issue. This didn't happen until recently.
Melting Slicks
Joined: Sep 2003
Posts: 3,306
Likes: 2
From: Wesley Chapel Fl
Take it to the dealer..it is still under warranty. Since it is a factory system untouched it is most likely a faulty piece of electronics. Not likely that the factory ground came loose and if it did the products would not work at all...not cause a turn on thump. Either the output from the radio is bad or the input to the amp is bad. Either way just take it to the dealer and have them swap electronics till it is gone.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Race Director
Joined: Feb 2004
Posts: 11,651
Likes: 9
From: HOW FAST WAS I GOING OFFICER? Los Angeles Hating GM Dealership Service Dept.'s Since Sept. 2004
St. Jude Donor '04-'05-'06-'07
Only "thunmp" my stock stereo had before I got a real one was the blown subwoofer ... came blown with the car.