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?

  • We're still trying to figure out the balancing point, but this may (or may not) be better suited for Video Production since it relates specifically to doing audio for video with a DSLR input (which is not a traditional type of professional audio connector).
    – AJ Henderson
    Feb 9, 2014 at 20:59
  • Are you saying that I should ask this in Video Production or that it might get moved there?
    – Phazor
    Feb 9, 2014 at 21:17
  • Just that it might get moved there. I was more raising the point as something to consider discussion on. We just split the sites in to audio and video components within the last week or so. We're still figuring out the boundaries.
    – AJ Henderson
    Feb 9, 2014 at 21:19

1 Answer 1


The output from the microphone you are looking at is powered, so it should hold up relatively well over short distances, but you are still going to pick up some noise. If you can get some shielded cable, it should probably be sufficient for your purposes. Running a balanced cable and converting it to unbalanced closer to the camera would still be preferable, but not nearly as cheap.

As long as you have good solid connections, plugging one cable in to another isn't nearly as much problem as run length, but do also keep in mind that 3.5mm cables are non-locking and can be pulled apart easily, so you'll need to tape them together for live usage. I would personally probably go with the shorter options. I'd even say get a 10 ft, a 15 ft and a 25 ft, that way you can use the shortest available combination.

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