One is most likely older than the other.
Sundown is known to have small revisions in their lineups from time to time to improve on small things that are not large enough to call it a whole new version.
Emailed sundown and that is exactly what they said. Said they were just made at different times
Weird Tinsel Leads ~ SA Audio
in Sundown Audio - GREAT Amps/Subs! GREAT Customer Service!
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Emailed sundown and that is exactly what they said. Said they were just made at different times