Own a piece of pro audio history.
Back when Mercenary Audio kicked ass — back when it was still owned by Fletcher and known for its legendary crew and no-BS approach to recording gear. Back before Stevie Boy managed to run an institution straight into the ground — these heavy-duty 500 series blank panels were included with the purchase of every 500 series module.
 
The idea was simple: when you bought another module to fill the empty slot, you mailed the panel back in the included prepaid envelope and Mercenary refunded you $50.
 
These are the real deal — thick, solid, heavy-duty steel panels made to properly protect unused slots in your 500 series rack. Not flimsy aftermarket fillers.
Extremely rare piece of recording industry history and a cool collectible from one of the most iconic eras of pro audio retail.