speaker

[Pat Cooke]

I have an intermittent screeching noise from my left front Bose speaker.
Can anyone confirm whether it is the amplifier or speaker ?

[gbrtng]

Amplifier failure - disconnect the amplifier or send it to Doctor Don in Huntsville TX for
repair. Replacements are available in salvage yards too - I think Nissan uses a similar amplifier.

[scottfab]

I have an intermittent screeching noise from my left front Bose speaker.
Can anyone confirm whether it is the amplifier or speaker ?

Yes, sounds like amp. As has been mentioned, you can replace it with one from a 95-98 Nissan Maxima equipped with Bose or you can repair it as is shown here:

Bose amp repair (http://www.zr1netregistry.com/Information/TechNet/Electronics/tabid/114/articleType/ArticleView/articleId/222/Bose-Amplifier-Removal-and-Repair.aspx)