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C5 rear speaker volume level question w/ PAC ROEM-Vet1 adapter

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

C5 rear speaker volume level question w/ PAC ROEM-Vet1 adapter

Old 04-15-2019, 02:05 PM
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Originally Posted by Stingroo View Post
...I know it's been a couple or three years now (lol) but did you ever get your sound back to your rear speakers?
@Stingroo , if you're having this problem, most probably your door subwoofers are too cranked up in relation to the 4 main channels, and since they are physically located in the same place as the front channels, this is creating the illusion that the rears are "lower" than the front channels, when in fact they are not.

In this specific application (remember the PAC is bundled with different harnesses for many other cars) the potentiometers on the PAC unit only have control of the door subwoofers (the 4 main channels are controlled from the headunit). Using the adjusting pots, try to play with the level of the subs until you reach a better overall balance (if necessary, adjust the headunit volume while you're doing that).

You can try this approach:
  1. Adjust the fade all the way to the front.
  2. Turn PAC pots all the way down (no signal to the subs).
  3. Turn up the HU to hear the 3" speakers.
  4. Start turning up the pots to add bass until a well balanced mix is obtained (subtle is the key word ).
  5. Fade back to center.

I was helping Sirdano with this same problem and he modified this adjusting procedure, kicking it up a couple of notches with good results . Click here for his write-up.

The following diagram may help to better understand all this:

Last edited by GCG; 04-17-2019 at 10:16 AM.
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