Pat,

The thing is, he does not know for SURE they used those speakers. Sure, they sound like a good shop, but if they used another speaker (knowing that he is not going to tear it apart to check), and he is HAPPY - what's the harm?

I'd lay money they used a different speaker, once they got in there. They sound knowledgeable and probably have various parts in stock (or locally available) and the tech knew right away what he could do to get it done - and I can see why they didn't tell him, no need to upset the customer when you can 'fix' it another way.

And for 29 years, I earned my pay in a similar way - the shop I worked at outfitted emergency vehicles. The guys would sub different parts often, just to get the job done and make the customer happy.

I'll bet that, when he asks them, they either make up some good sounding story, or they just tell him, "Yea, those speakers never would fit, we used the Google-tronics 4000's instead - they cost more, but we didn't bill you more".. And had they called him, he'd have told them to do that, anyway. Again, I see no harm in what I THINK they did.