Introduction

The DM-100 is still the go-to microphone for all Legria / Vixia camcorders. This basically includes all Canon camcorders starting with "HF". The mic has a high price point of about 190$, and has a design flaw that will render it unusable after only a couple of years of use.

Symptoms: The microphone produces a rattling noise when the camera is being moved, basically rendering it useless for all other than stationary shots. This guide will give a quick fix to the problem for less than a dollar.

This is the rattly beast.
  • This is the rattly beast.

Add Comment

You access the internals by removing the grill in the front, which is held in place by a small amount of adhesive.
  • You access the internals by removing the grill in the front, which is held in place by a small amount of adhesive.

  • Use a set of tweezers (or a pointy metallic object, I used a tiny screwdriver) and gently pull in a circular fashion not to destroy the metal girder.

Add Comment

Canon has used an elastic band for vibration reduction of the directional "sound pipe" (seen as a circle behind the elastic band). The pipe visible behind the elastic  is supposed to be mounted toe the inner wall with the two marked circular joints.
  • Canon has used an elastic band for vibration reduction of the directional "sound pipe" (seen as a circle behind the elastic band).

  • The pipe visible behind the elastic is supposed to be mounted toe the inner wall with the two marked circular joints.

  • These incredibly weak joints are bound to break as the rubber loses its elasticity.

Add Comment

Rubber band is irreparable and needs to go. I scratched it out using a small, sharp screwdriver. Rubber band is irreparable and needs to go. I scratched it out using a small, sharp screwdriver.
  • Rubber band is irreparable and needs to go. I scratched it out using a small, sharp screwdriver.

Add Comment

Black Friday
Broken doesn't stand a chance.
The culprit of the rattling noise is now apparent. A plastic cylinder stretches through the whole of the microphone, enabling the microphones forward focused / directional sound.
  • The culprit of the rattling noise is now apparent. A plastic cylinder stretches through the whole of the microphone, enabling the microphones forward focused / directional sound.

  • When the rubber band breaks because of the bad joints, this thing hits the inner side of the cylinder.

Add Comment

I measured the internal diameter, and found that there in total was a void of about 2mm  in between the tube and the mic cylinder. After some searching, I found a 2mm thick foam sheet  for about 50 cents at a hobbyist shop. Use this to cut a small sheet of depth of about 2 cm and length matching the inner circumference.
  • I measured the internal diameter, and found that there in total was a void of about 2mm in between the tube and the mic cylinder.

  • After some searching, I found a 2mm thick foam sheet for about 50 cents at a hobbyist shop.

  • Use this to cut a small sheet of depth of about 2 cm and length matching the inner circumference.

Add Comment

After some scissoring, you should have something that looks a bit like this.
  • After some scissoring, you should have something that looks a bit like this.

Add Comment

Add a dab of glue around the foam  to make sure it stays in place.
  • Add a dab of glue around the foam to make sure it stays in place.

Add Comment

Add a thin layer of glue to the yellow circle and reattach the grill and windstopper.
  • Add a thin layer of glue to the yellow circle and reattach the grill and windstopper.

Add Comment

There! 190$ microphone fixed for less than a dollar.
  • There! 190$ microphone fixed for less than a dollar.

  • The audio quality isn't affected at all.

Add Comment

Conclusion

The DM-100 is a good, but expensive microphone for all Canon camcorders. The internal suspension is broken by design, and will render the microphone unusable after 2-3 years of use.

This fix is a permanent fix to Canons poor design. Since the pipe is solid, and the foam is only reaching about 2cm into the pipe, audio quality is not affected at all.

One other person completed this guide.

Bonka

Member since: 05/15/2015

131 Reputation

1 Guide authored

0 Comments

Add Comment

View Statistics:

Past 24 Hours: 0

Past 7 Days: 3

Past 30 Days: 10

All Time: 72