Impreza Outback Sport AWD F4-2.5L SOHC (2002)
If the speakers still chatter and/or vibrate, perform the following countermeasure(s):
[A] Standard speaker, perform Countermeasure 1 & 2.
[B] High-grade speaker, perform Countermeasure 1.
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Sealing covers with urethane are used with high-grade speakers; therefore countermeasure 2 does not need to be performed.
How to distinguish between Standard speaker and High-grade speaker
Vehicles equipped with standard speakers use a sealing cover without urethane. Vehicles equipped with high-grade speakers use a sealing cover with
urethane.
Countermeasure 1
1)
Remove the door trim speaker and sealing cover (see figure 1, below).