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just got some IEM's - static :(
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PhilG
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im using the Sennheiser EW 300 series, have a g2 and a g3 set.

The problem I am having is a kind of static almost pink noise sound comming from the studiolive aux sends - I do not notice this noise when using wedges (MRS400's) but now that im using these in ears we notice quite a bit of static - its not a hugely loud issue but it is there and rather annoying.

Basically what I have done so far is tried different frequencies on the IEM's and different aux sends, tried different squelch settings on the rx unit but its all the same static noise - I unplug the balanced outputs from the desk and the noise goes away - the noise is also evident if I connect the IEM's to the main outs but not as much.

Im not sure of the technical term but I call it amplifier noise - kind of like if you connected speakers to your desk and opened all the channels wide open with the amps / speakers cranked up you always get the slight hissing noise - thats what its like in the IEM's.

Im pretty sure this is not normal but they are perfectly quiet when not connected to the desk.

is it just a setting that I dont have quite right somewhere or is it a deeper issue like power supply noise ... I really hope not as my desk just came out of warranty

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Hey, I had a similar problem with my Sennheiser G3 until I bought the Omni Directional antenna & hooked it up http://www.sweetwater.com/store/detail/A1031U

Not sure if you're having exactly the same problem but it sounds like the issue I was having. There's a big difference now between hooking up the external antenna and not. From what I understand you can use one omni antenna & daisy chain the units together to use it. I haven't done that yet, as I only have one transmitter, but I read somewhere that you can do that.

Hope this helps. I searched for quite a while trying to find a solution to the static (squelch, trims, levels, etc) until I finally decided to try the antenna.

Good luck.
- Ray
PhilG
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yeah im pretty sure its not the IEM's as if I disconnect the TRS leads from the SL the noise has totally gone - if I hook up a wireless sm58 straight to the iems, no static either - im 100% sure its comming from the SL

2 x SL16.4.2's
Audiobox USB
Studio One V2 Pro
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AMD FX-4170 / 16GB DDR3 / Win7x64 / Via 6308FW Onboard
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MikeRivers
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Joined: 28/07/2010 15:44:52
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There was a problem a while back with some power supplies that generated a fair amount of radio interference. It could be that yours is one of those, and that the interference is being coupled to the transmitter directly through the cable connecting it to the mixer.

If I remember correctly, the test people were using is to tune a radio to about 100 MHz and move it close to the mixer. You'll hear the noise in the radio if you have a noisy power supply. PreSonus will fix it if you send it back to them.
Visit http://mikeriversaudio.wordpress.com for some useful audio info
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PhilG
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MikeRivers wrote:There was a problem a while back with some power supplies that generated a fair amount of radio interference. It could be that yours is one of those, and that the interference is being coupled to the transmitter directly through the cable connecting it to the mixer.

If I remember correctly, the test people were using is to tune a radio to about 100 MHz and move it close to the mixer. You'll hear the noise in the radio if you have a noisy power supply. PreSonus will fix it if you send it back to them.


Yeah thats an option but the shipping quote isnt

Just did the test and yeah I get a slight hum/buzz in the radio this fully sucks - at least I dont get the buzz out the FOH speakers

Pickup Fri Aug 6, 2010 10:30 AM Brisbane Australia FedEx International to Batton Rouge California $707.63 AUD / 645.14 USD

I would probably buy another desk than send it International mail with those kinds of rates

Any chance of Presonus shipping me the PSU and I can fix it myself??

This message was edited 2 times. Last update was at 04/08/2010 13:31:06


2 x SL16.4.2's
Audiobox USB
Studio One V2 Pro
/ Rack System
AMD FX-4170 / 16GB DDR3 / Win7x64 / Via 6308FW Onboard
/Mobile System
Toshiba Satellite P200 / 8GB DDR2 / Win7x64 / Ti FW & i7 13" MBP
/Wireless
Ipad v1 16gb - Samsung Galaxy Tab - Asus Black Diamond router

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MikeRivers
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If they're selling the mixer in Australia, they should be supporting it there. Try an e-mail to Tech Support asking what you can do.
Visit http://mikeriversaudio.wordpress.com for some useful audio info
"It's much easier to look for a magic solution than it is to adapt to reality." - Allan Sloan
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PhilG
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Just sent an email to Rick - I hope I get some kind of good news

2 x SL16.4.2's
Audiobox USB
Studio One V2 Pro
/ Rack System
AMD FX-4170 / 16GB DDR3 / Win7x64 / Via 6308FW Onboard
/Mobile System
Toshiba Satellite P200 / 8GB DDR2 / Win7x64 / Ti FW & i7 13" MBP
/Wireless
Ipad v1 16gb - Samsung Galaxy Tab - Asus Black Diamond router

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TimmyP1955
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IIRC there was a weird problem with one or two particular consoles and a particular IEM transmitter - it could be that this console/IEM combination has the same anomaly. I can't remember if it was Senny or Shure IEMs, but there was a fix - a google search might get you the info (I thought I had it saved, but can't find it ;-(
http://www.padrick.net/TP_Audio.htm
Big Joe Daddy
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Joined: 30/07/2010 01:24:03
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PhilG wrote:im using the Sennheiser EW 300 series, have a g2 and a g3 set.

The problem I am having is a kind of static almost pink noise sound comming from the studiolive aux sends - I do not notice this noise when using wedges (MRS400's) but now that im using these in ears we notice quite a bit of static - its not a hugely loud issue but it is there and rather annoying.

Basically what I have done so far is tried different frequencies on the IEM's and different aux sends, tried different squelch settings on the rx unit but its all the same static noise - I unplug the balanced outputs from the desk and the noise goes away - the noise is also evident if I connect the IEM's to the main outs but not as much.

Im not sure of the technical term but I call it amplifier noise - kind of like if you connected speakers to your desk and opened all the channels wide open with the amps / speakers cranked up you always get the slight hissing noise - thats what its like in the IEM's.

Im pretty sure this is not normal but they are perfectly quiet when not connected to the desk.

is it just a setting that I dont have quite right somewhere or is it a deeper issue like power supply noise ... I really hope not as my desk just came out of warranty

Hey Phil,
I just got a Sennheiser EW 300 G3 system and I've got the same problem you described. In my case, I'm certain it's not the desk. I hear the static even when nothing else in the room is even on, except the belt pack receiver. The static level doesn't change when I adjust the volume level on the receiver. Weird. I first tried the setup last night with my Audio Technica ATH-M50 headphones and it sounded great. Then tonight I tried it with my Ultimate Ears UE 11's and the static was very pronounces and very annoying. Went and tried the headphones again and static was almost completely silent. I'm stumped. Any ideas?
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Monolithent
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Have you tried the UE plugs on anything else?
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Big Joe Daddy
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Yeah Johnny,
I tried my buds on other sources and they sound great. The hiss with the IEM receiver and transmitter isn't as bad as I thought once I start to run some audio through 'em. We rehearsed a couple nights ago with all IEM's and they sounded great. Just sort of a bummer that there's any hiss at all.

In any case, with the SL 24.4.2, we're running five pairs of stereo auxes, and everybody is happy. I keep bugging other boys in the band to get Qmix going so they can tweak their mix themselves but they keep telling me it sounds great and no tweaking needed.

Rock on!
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