Boston Acoustics Dust cap differences

Sleeklsc
5,000+ posts

CarAudio.com Veteran
I can't figure this out. Why did some of the G series Boston subwoofers have a gray dust cap while others had a black one? I tried to figure out if it was a generational change or if the difference was rather it was a d4 or s4 but can't figure it out. Past reviews for both versions don't hint at any clues as to when the change was made.

 
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Sleeklsc

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