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cm312ae and sennheiser evolution wireless


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#1 fab

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Posted 18 February 2007 - 12:23 PM

Hello !

Can we plug a cm312ae microphone on a sennheiser evolution wireless transmitter ?

It's compatible or not ?

Because we have plug it on a EW100 transmitter,
and the AF signal (of the receiver) is very low.

The mic deliver signal, but very low, and we have "blowing sound".

It's connect on a 3,5 mm jack:
1: shield
2: audio
3: +

is it good ?

Thanks a lot for your answer.

Fab
France

#2 MChapman

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Posted 19 February 2007 - 04:03 PM

QUOTE(fab @ Feb 18 2007, 12:23 PM)
Can we plug a cm312ae microphone on a sennheiser evolution wireless transmitter ?

It's compatible or not ?

Because we have plug it on a EW100 transmitter,
and the AF signal (of the receiver) is very low.

The mic deliver signal, but very low, and we have "blowing sound".

It's connect on a 3,5 mm jack:
1: shield
2: audio
3: +

is it good ?
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Yes, the CM-312AE and the CM-311AE can be used on the G2 Evolution transmitters, but there are a couple tricks. Sennheiser typically uses a 2 wire configuration, where the audio and bias voltage are together on the tip. Our mics are designed as 3 wire, where you need separate contacts for audio, bias voltage, and ground.
On the 3.5mm jack, you have a tip, ring, and sleeve. The tip will be the red wire for bias voltage. The ring will be the white wire for the audio input, while the sleeve is the ground or shield. Since we are using the ring for the audio input, the transmitter will have to be changed to show 0dB attenuation (if I remember correctly, it is normally set at 30 or 40dB attenuation) for a mic input on the ring, which is normally the "line level" input.
<span style='color:blue'>J. Mark Chapman
Crown Application Support Technician</span>

#3 Aurélien

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Posted 01 March 2007 - 06:20 PM

Hello !

Thanks ... But ......

It doesn't work on my Sennheiser Pocket (old and new generation) ...

I have changed the attenuation to 0dB, it's the same.

There are always "blowing sound"

I will check the cm312ae on a shure transmitter next week.

#4 MChapman

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Posted 09 March 2007 - 04:17 PM

Assuming you wired the connector correctly, the mic should work. However, if it is wired right and is still making the "blowing sound", then there is a good chance the mic has been damaged in the process of changing it, and it needs to see service. Only way to know for sure is to have another CM-312AE wired for the Sennheiser to test against. If one works and one does not, then you know it is the mic. I would suggest you get the mic in for service.
<span style='color:blue'>J. Mark Chapman
Crown Application Support Technician</span>