The “Shot Caller” was unveiled in the MTX Audio booth at the 2007 SEMA show. According to its creator, Marketing In Motion (MIM), the pimped R550 is the first 

Link: MIM
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The “Shot Caller” was unveiled in the MTX Audio booth at the 2007 SEMA show. According to its creator, Marketing In Motion (MIM), the pimped R550 is the first 

Link: MIM
|
|
|---|



