Mic Problems

[Mattangles]

Hi all,

 

I am using some sennheiser ew100 g2 packs with some cheapish cpc prosignal heads (seem to do the job). The problem is the heads (which are booms) are so sensitive they peak the input. The only way the system doesnt peak is if I take the sensitivity of the packs down to -30db. (I have also tried move the mic placement further back along the head). When I take the system down to -30db I have so little gain on the audio I end up just amplifying unwanted noise (hum!)

 

Ive been looking to see if any kind of inline attenuators are avaliable for the sennheiser g2 packs to lower the input gain of the mic before it gets to the pack. Unfortuantly I cant find such a device.

 

If anyone can help it would be greatly apreciated.

[johndenim]

Limiter/Compressor?

[david.elsbury]

John, did you miss the part in the OP where it says "inline" and "...the mic before it gets to the pack" ?

 

To the OP, if that's what you want to do, a two resistor network should pad the audio down sufficiently, you may be able to fit the resistors into the connector?

Do a search for attenuation on here, it's been discussed before but more in reference to a line level signal- but I would say the calculations would be the same.

 

[Shez]

When I take the system down to -30db I have so little gain on the audio I end up just amplifying unwanted noise (hum!)

 

I'm using very similar mics with those same packs (yes they are very sensitive) all this week in a panto. The packs are all at -30dB out of necessity and I've not encountered any noise issues whatsoever. Nor have I experienced them when doing such things numerous times previously.

I would be looking somewhere else for the problem. What is the output level of the receivers set to? Are you going in to a mic or line input?

[paulears]

I too have no issues with using the 30dB setting on the transmitters - works fine - no problems at all. If you use the middle setting I don't find this an abnormal jump. The settings seem quite sensible and finding the correct one hasn't been an issue.

[Sound Man]

You need to take the sensitivity of the packs back down to -30db and turn up the AF output of the receivers to get more signal into your mixer.

 

This will sort out your issues.

 

David

[TimmyP1955]

You need to take the sensitivity of the packs back down to -30db and turn up the AF output of the receivers to get more signal into your mixer. This will sort out your issues.

 

David

 

Agreed. Running the packs at -30 should give you no problems at all. The problem comes in when you run the output of the receiver too low. There is a bit of noise on the output of the receivers that does not change when you goose the audio output level. So goose the level, and all will be well.

 

Also, make sure that none of your XLR connectors (cables, snake stage box, cable fanout, etc.) have pin 1 connected to the body of the connector. This will cause a buzz in many systems.

[Rob_Beech]

Well Shez, I'm pleased they're working for you, still can't work out where that last receiver went, but back OT. As Shez says, there are not normally problems with this combination, I have over 30 channels of this very combination(actually shez has 12 channels from me but only 2 of them are mine) (ok the heads are not all cpc but they're the same sort of thing) and I usually find -30dB and a balanced output level on the AF out on the receiver works well. The noise must therefore be picked up from elsewhere in the chain.