I'm looking to buy the Aputure V-Mic D1 which is a Shotgun mic for DSLRs, so it terminates with a 3.5 mm connector (my camera has a 3.5 mm jack). I'd like to extend this so I can mount it on a boom. I'm planning on getting a Monoprice 3.5 mm extension cable. How long can the extension run for before the quality of the sound gets audibly degraded?
I was thinking I should get a 50 ft cable, but is that too long (in terms of degrading sound quality)? Would it make sense to have two 25 ft cables and plug them into each other only when I need 50 ft (and using just a single 25 ft cable when I don't need all 50 ft)? Or is plugging an extension into an extension a really bad idea?