Topic: ECM-MS907 and 12 Volts?

[NineEyes]

Has anyone tried loading the ECM-MS907 with two PX28 (6V) batteries for 12 volts?  I have another electret where this is recommended over the standard 1.5V AA for "greater dynamic range and higher SPL."

If so, does 12V reduce the MS907 self noise?

[Church-Audio]

Has anyone tried loading the ECM-MS907 with two PX28 (6V) batteries for 12 volts?  I have another electret where this is recommended over the standard 1.5V AA for "greater dynamic range and higher SPL."

If so, does 12V reduce the MS907 self noise?

Increasing the voltage to the fet will not really reduce the output noise. The main problem with that mic is the lack of sensitivity that the capsules have. You would be better off with a pair of fets inside to boost the output level but you will also be boosting the noise of the capsules as well. If you want to send the mic to me I might have some capsules here that would be more sensitive and have lower self noise.

[NineEyes]

Chris,

Increasing the voltage to the fet will not really reduce the output noise.

This makes sense.  Agree.

Here are some pictures of the electrets in the MS907:

http://drop.io/ecm_ms907

The two electrets are 14mm in diameter, appear to be identical and are open-backed.  The FETs are exposed and could be replaced without replacing the diaphrams.

There is some potential here.  Does anybody want to give their MS907 to science?

[Church-Audio]

Chris,

Increasing the voltage to the fet will not really reduce the output noise.

This makes sense.  Agree.

Here are some pictures of the electrets in the MS907:

http://drop.io/ecm_ms907

The two electrets are 14mm in diameter, appear to be identical and are open-backed.  The FETs are exposed and could be replaced without replacing the diaphrams.

There is some potential here.  Does anybody want to give their MS907 to science?

I agree with John there is no point to replacing the fet But I might be able to do something with the circuit and shielding to reduce noise as well as a more sensitive capsule.

[illconditioned]

Remember, one of those capsules is a figure-8.  Does anyone know a source of these capsules?  If so, please tell me, lol.

As far as replacing the mid capsule, I don't think the Transsound are any better.

Instead, I would suggest applying EQ (bass boost) in post.  And take the grille off for better high freq response.  Both suggestions from Bob Cain at the Yahoo "micbuilders" discussion group.

 Richard

[jacobmyers]

 Speaking as a former (and reasonably active) user of the MS907, I have to say that your money could be better spent elsewhere. The cable is flimsy, there really is no low end to speak of, and it picks up cellphones within ~10ft as if it was the tower. That said, I used one for years because it fit my budget. The first thing I did after purchasing is was make an adapter cable for twin 1/4" output (from an old stereo RCA cable and parts from Radio Shack. I then proceeded to record hundreds of hours of audio over the 2+ years I used the mic.

 Some of the recordings were good enough that I co-produced two "locals only" compilation CDs of four-track SBD/AUD mixes which used the MS907 with a variety of four-track recorders (both analog and digital). Some of the bands I recorded used my work as their "live demo" CD. But the recordings needed a LOT of careful post-recording processing (as mentioned by illconditioned), all of it intended to deal with the limitations of the microphone itself. Approach the MS907 with caution (and with its limitations in mind).