Author Topic: Bad sound distortion on stock stereo  (Read 718 times)

Offline shinkle

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Bad sound distortion on stock stereo
« on: April 10, 2021, 11:27:00 AM »
My stock radio has a digital clock with cassett player. It works great except for a bad distortion on the left side speakers. Mainly the rear speaker on the bass sound. The beat beat beat rythm of songs is badly distorted. I replaced the rear stock speakers with no luck. It does it on both antenna and cassette tapes.

Any suggestions?
1987 R10 5.7L TBI

Offline bd

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Re: Bad sound distortion on stock stereo
« Reply #1 on: April 10, 2021, 12:48:49 PM »
Try thoroughly cleaning and verifying all of the connections between the head unit and the speakers.  Validate the ground connection for the head unit.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline mdws1987

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Re: Bad sound distortion on stock stereo
« Reply #2 on: April 10, 2021, 04:21:27 PM »
Try reversing the left and right connections at the radio. If the distortion moves to the other side, the radio output may be bad...

Offline shinkle

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Re: Bad sound distortion on stock stereo
« Reply #3 on: April 10, 2021, 10:12:24 PM »
Where would the ground for the head unit be located? 

I'll try the left right swap and see if the distortion follows it
1987 R10 5.7L TBI

Offline bd

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Re: Bad sound distortion on stock stereo
« Reply #4 on: April 10, 2021, 11:18:52 PM »
Where would the ground for the head unit be located? 

If it follows the factory location, the radio grounds to the left kick panel area or the e-brake pedal frame.  Switching the left rear and right rear feeds is a good idea.
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)

Offline calif phil

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Re: Bad sound distortion on stock stereo
« Reply #5 on: October 16, 2021, 08:38:49 PM »
I sprayed the shafts of my stock ETR radio with Deoxit and it improved the sound immediately.   I took the radio out to do it. 


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Online JohnnyPopper

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Re: Bad sound distortion on stock stereo
« Reply #6 on: October 16, 2021, 09:33:37 PM »
That stuff is phenomenal! D5 for general purposes, F5 made the same but is good on faders.

(funny- spell check doesn't recognize "fader") ::)

Please post what you find!
1957 Apache 3100 235 Inline 6, 3 on the tree
1973 C-20, 3+3 454 4BBL TH400  Water Injection
1978 K-10, 350 4BBL TH350 NP203 M.M. Part time Kit/Hubs
1980 C-10 under construction

Offline bd

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Re: Bad sound distortion on stock stereo
« Reply #7 on: October 16, 2021, 11:34:00 PM »
(funny- spell check doesn't recognize "fader") ::)

First name "garth," from a galaxy... well, somewhere...  :)
Rich
It's difficult to know just how much you don't know until you know it.
In other words... if people learn by making mistakes, by now I should know just about everything!!!
87 R10 Silverado Fleetside 355 MPFI 700R4 3.42 Locker (aka Rusty, aka Mater)