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Microphone Frequency Question

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Bigdog
Posts: 2937
Joined: Wed Jan 31, 2007 2:15 am

Microphone Frequency Question

Post by Bigdog »

Shure advertises 2 different freqency bands on their cordless microphones.

H5 band---518--542

L4 band---638--662

Any preference????

I thought they would cover all the freqencies in one unit but it's not so. Now you have to pick one band or the other.


DanG2006
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Location: USA

Post by DanG2006 »

One thing is good with that. If you're buying more than one for the same system you can pretty much gurrantee that they won't interfere with each other if you purchase one from each band.
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letitrip
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Location: Jackson, WI

Post by letitrip »

I have two Shure wireless systems, a J3 and L4 and have never noticed a difference between them in terms of range or interference. Unfortunately, DanG is not correct that having them in different bands prevents interference. Multiple devices operating on different frequencies can create both harmonic and intermodulation interference. Without getting into the nitty gritty details, the interaction of two signals at different frequencies can result in a signal at a third frequency, that's intermodulation. Harmonic interference occurs when two devices operate on frequencies that are harmonics of eachother. These types of interference are why having a 12 channel system doesn't mean you can have 12 microphones operating at the same time.

In the end, the number of channels the system supports is way more important than which band it operates in (unless of course you're building a full concert system with 10, 15, 20 devices). Typically you'll find holes to operate in no matter what band, but the more options you have in terms of channels, the better your chances. Hopefully that all makes sense.
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Bigdog
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Post by Bigdog »

So which one do we pick?

H5 or L4
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letitrip
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Joined: Fri Nov 24, 2006 12:47 am
Location: Jackson, WI

Post by letitrip »

You'll do fine with either one, unless you've got a whole slew of wireless devices going on at that same time (like 8 or more) it won't matter which band you pick. More important would be your choice of PGX, SLX or ULX series. PGX having the fewest number of channels (8 or 12, I don't recall for sure which) SLX has over 20 and ULX over 40.

My choice was the SLX series. Enough channels to ensure I'll never have a problem but all the nice user friendly features (auto channel selection, AA instead of 9V batteries, etc).
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