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Title: Wireless Mic System for measurements
Post by: David Sturzenbecher on September 06, 2013, 08:29:14 PM
Looking through the topic lists I don't see anything recent on wireless mic systems for system tuning. 

I am looking for a system that has good response below 20hz.  I have found that my current Lectrosonics TM400a rolls off heavy before 50hz which makes crossover decisions in this area difficult. 

Is there anything out there with verified response a little lower?
Title: Re: Wireless Mic System for measurements
Post by: Doug Fowler on September 06, 2013, 08:35:59 PM
Looking through the topic lists I don't see anything recent on wireless mic systems for system tuning. 

I am looking for a system that has good response below 20hz.  I have found that my current Lectrosonics TM400a rolls off heavy before 50hz which makes crossover decisions in this area difficult. 

Is there anything out there with verified response a little lower?

My MacGyver rig using Line6 beltpacks is flat to at least 20, maybe down to 16 Hz IIRC. 

Line6 beltpack / receiver / Shure cable / Countryman phantom power box.  It's around $600 per channel.

The caveat is your microphone has to be happy with 18v. 

Is your microphone solid below 20 Hz?

Title: Re: Wireless Mic System for measurements
Post by: David Sturzenbecher on September 06, 2013, 08:41:26 PM
I use a Josephson C550 and Audix TM1s... (Not at the same time). Spec sheet say flat till 20... Haven't dug up the graphs yet.
Title: Re: Wireless Mic System for measurements
Post by: Doug Fowler on September 06, 2013, 08:47:09 PM
I use a Josephson C550 and Audix TM1s... (Not at the same time). Spec sheet say flat till 20... Haven't dug up the graphs yet.

I also use a 550.
Title: Re: Wireless Mic System for measurements
Post by: Jason Lavoie on September 09, 2013, 08:33:59 PM
Looking through the topic lists I don't see anything recent on wireless mic systems for system tuning. 

I am looking for a system that has good response below 20hz.  I have found that my current Lectrosonics TM400a rolls off heavy before 50hz which makes crossover decisions in this area difficult. 

Is there anything out there with verified response a little lower?

You are aware that the lectrosonics transmitters have a selectable high pass filter? options are 35, 50, 70, and hopefully off (though the manual doesn't mention it and I don't have mine handy to test).

Jason
Title: Re: Wireless Mic System for measurements
Post by: Johnny Diaz on September 10, 2013, 07:41:17 PM
What is the decent wireless mic system to use for measurements with Smaart?  Do I have to spend almost 2K for the Lectrosonics TM400?  Anything a bit cheaper?
Title: Re: Wireless Mic System for measurements
Post by: Don Boomer on September 10, 2013, 07:43:50 PM
What is the decent wireless mic system to use for measurements with Smaart?  Do I have to spend almost 2K for the Lectrosonics TM400?  Anything a bit cheaper?

Did you miss the second post in this thread?  ;)
Title: Re: Wireless Mic System for measurements
Post by: Johnny Diaz on September 10, 2013, 09:39:51 PM
Did you miss the second post in this thread?  ;)

Sorry don't understand the second post. 
Title: Re: Wireless Mic System for measurements
Post by: Mac Kerr on September 10, 2013, 09:51:32 PM
Sorry don't understand the second post.

Then maybe you shouldn't be trying out measurements you don't understand. The post was quite clear. It listed all the equipment an experienced measurement specialist uses for his wireless measurements.

Mac
Title: Re: Wireless Mic System for measurements
Post by: Johnny Diaz on September 11, 2013, 07:29:27 AM
My MacGyver rig using Line6 beltpacks is flat to at least 20, maybe down to 16 Hz IIRC. 

Line6 beltpack / receiver / Shure cable / Countryman phantom power box.  It's around $600 per channel.

The caveat is your microphone has to be happy with 18v. 

Is your microphone solid below 20 Hz?

Doug,

What receiver do yo use?  Would the earthworks m23 work with this setup?

Johnny
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 12, 2013, 03:36:00 PM
Would the earthworks m23 work with this setup?
I see no reason why the Earthworks m23 wouldn't work with this setup.  Use a battery power phantom power adapter such as the Countryman Battery Power Module AXBPM, which provides 18V phantom power, which is sufficient for the M23.  On my Lectrosonics HM transmitter, I have mine set to 15 volts mic power, and my M23 works fine with that voltage.  Considering that the Line 6 XD-V70L systems are discontinued and dealers are selling off old stock, you might be able find a good deal on one.  Hmm, this is very tempting!   :)

The only caveat in using phantom power supplies with less voltage output is that the microphone loses a few dB of headroom, but considering the Max Acoustic input of the M23 is 142 dB SPL with 48 volt phantom power, I don't think you'd be measuring at that high a level anyway, or even a couple dB less!  I certainly wouldn't want to be in such conditions!
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 13, 2013, 01:38:27 PM
I see no reason why the Earthworks m23 wouldn't work with this setup.  Use a battery power phantom power adapter such as the Countryman Battery Power Module AXBPM, which provides 18V phantom power, which is sufficient for the M23.  On my Lectrosonics HM transmitter, I have mine set to 15 volts mic power, and my M23 works fine with that voltage.  Considering that the Line 6 XD-V70L systems are discontinued and dealers are selling off old stock, you might be able find a good deal on one.  Hmm, this is very tempting!   :)

The only caveat in using phantom power supplies with less voltage output is that the microphone loses a few dB of headroom, but considering the Max Acoustic input of the M23 is 142 dB SPL with 48 volt phantom power, I don't think you'd be measuring at that high a level anyway, or even a couple dB less!  I certainly wouldn't want to be in such conditions!
Its not so much the power but the sensitivity of the M23. At least on the Line6  i have where there are no gain on the beltpack (what a hopeless design... but thats an other story) it makes the signal to noise ratio way low to an almost unusable level.
I have only gotten good result with a little DPA 4061(60) (what ever is the high gain version, can't remember), but don't have the mic Dough use to test.
/R
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 13, 2013, 03:10:46 PM
Its not so much the power but the sensitivity of the M23. At least on the Line6  i have where there are no gain on the beltpack (what a hopeless design... but thats an other story) it makes the signal to noise ratio way low to an almost unusable level.
I have only gotten good result with a little DPA 4061(60) (what ever is the high gain version, can't remember), but don't have the mic Dough use to test.
/R
So with the Line 6 bodypack transmitter, use a mic with a higher output?  Anyone know if the Earthworks M30BX or the NTI Mini SPL battery powered mics have a higher output?  What test mics have been successfully used with the Line 6 bodypack transmitter?

No input gain trim on the Line 6 bodypack transmitter??  That's very odd!  How does one compensate for the varying levels from Lav mics and the strength of a person's voice with such a system?   :o
Title: Re: Wireless Mic System for measurements
Post by: David Sturzenbecher on September 13, 2013, 04:03:45 PM

You are aware that the lectrosonics transmitters have a selectable high pass filter? options are 35, 50, 70, and hopefully off (though the manual doesn't mention it and I don't have mine handy to test).

Jason

I can't find that option on my UH400TM, manual states 12db/oct at 35Hz. But I suspect higher.
Title: Re: Wireless Mic System for measurements
Post by: Don Boomer on September 13, 2013, 05:06:29 PM

No input gain trim on the Line 6 bodypack transmitter??  That's very odd!  How does one compensate for the varying levels from Lav mics and the strength of a person's voice with such a system?   :o

Same way as you do with a wired mic ... at the mixer.  All Line 6 systems are simply unity gain.

btw ... there is a built-in little Line 6 trick that we have been using for years to drive the bit rate up in the case of very low input.  If you are within 20 dB it comes out optimized.
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 14, 2013, 03:07:48 AM
Same way as you do with a wired mic ... at the mixer.  All Line 6 systems are simply unity gain.

btw ... there is a built-in little Line 6 trick that we have been using for years to drive the bit rate up in the case of very low input.  If you are within 20 dB it comes out optimized.

Hey Don,
What mic sensitivity mv/PA does the beltpack "expect"? (thinking about the system that comes with a Lav mic, can't remember the model number) Also doesn't the bit rate manipulation render the system non linear?, a big deal for us measure meant folks, or does it mean you only have 20db of linear working space (headroom), any where to tell when the bite rate increases?.

mvh
R
Title: Re: Wireless Mic System for measurements
Post by: Jason Lavoie on September 14, 2013, 04:41:16 PM
I can't find that option on my UH400TM, manual states 12db/oct at 35Hz. But I suspect higher.

It looks like you are correct. only the newer HM Series has the selectable filter. yours is unfortunately fixed..

Jason
Title: Re: Wireless Mic System for measurements
Post by: Gustaf Kempe on September 14, 2013, 07:19:22 PM
So with the Line 6 bodypack transmitter, use a mic with a higher output?  Anyone know if the Earthworks M30BX or the NTI Mini SPL battery powered mics have a higher output?  What test mics have been successfully used with the Line 6 bodypack transmitter?

No input gain trim on the Line 6 bodypack transmitter??  That's very odd!  How does one compensate for the varying levels from Lav mics and the strength of a person's voice with such a system?   :o
I use the Line6 system with a Nti Mini SPL, works flawless. I measured it wired vs wireless and the only difference is that with the line6 I loose 5dB. But that I compensated for on the output volume of the reciever (so the SPL meter stays the same).

I thought of buying the M30BX but thought it was a bit expensive to travell with.
The NTI drops off from about 4kHz, but as long as you know about it...
It's a quite neet setup without an phantompower sypply, just a cable from the mic to the bodypack. I have one of those headphone holders for mic stands that I put the beltpack on.
Title: Re: Wireless Mic System for measurements
Post by: Alfredo Prada on September 14, 2013, 07:38:53 PM
So with the Line 6 bodypack transmitter, use a mic with a higher output?  Anyone know if the Earthworks M30BX or the NTI Mini SPL battery powered mics have a higher output? 

My NTI mini SPL sensitivity measured 20.6 mV/PA versus 6.71 mV/PA from my SIA RTA420, measured with NTI 's XL2 calibration function and Galaxy Audio's mic calibrator @94 dB


Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 20, 2013, 06:08:40 AM
Here is a loop through test of the Line6. And a pic to show that compare to a M23 on wire you have ca 15db less gain with a DPA 4060 and about 25db less gain with the Micw. So by not having a gain on the beltpack you have to increase the noise 15/25 db... not reallly optimal?
/R
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 20, 2013, 02:07:30 PM
Here is a loop through test of the Line6. And a pic to show that compare to a M23 on wire you have ca 15db less gain with a DPA 4060 and about 25db less gain with the Micw. So by not having a gain on the beltpack you have to increase the noise 15/25 db... not reallly optimal?
/R
Hi Rasmus,  Could you repost those jpgs at higher resolution/bigger size?  Very interesting!
So what you're saying is that the beltpack M23 is 25 dB less than a M23 on a wire?  Are you able to do some noise floor comparisons in spectrum mode?
Arthur

Edit:  It would be great to know the setup of your measurement (eg input gains) as well.
Title: Re: Wireless Mic System for measurements
Post by: Gustaf Kempe on September 20, 2013, 03:31:44 PM
But you have to test it that eay with 2 identical mics. I only loose 5dB compared to a wire. You don't have to do a TF to find out. Ju a spectrum and check the dB level in Smaart, first with wire then with Line6. If I would loose 25dB it would only be noise in my measurements, and it's not...
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 21, 2013, 11:19:38 AM
But you have to test it that eay with 2 identical mics. I only loose 5dB compared to a wire. You don't have to do a TF to find out. Ju a spectrum and check the dB level in Smaart, first with wire then with Line6. If I would loose 25dB it would only be noise in my measurements, and it's not...

Evil kanivel... don't multi task and do forum posts, i guess is the lesson.

Oki sorry for the confusion, What my point with the pic was just to show that cutting the feature to be able to gain on the belt pack, is "sad", as two cheap and widely available mic's can't be used directly with the system, at least optimal or?.

I believe the root of my own confusion was that last time we tested was not with the M23. Or more likely we tested the M23 to a lower gain mic receiving less input and scratched the idea of making it work.   

So to clear up:
Yes, you can use the M23 on the line6 with a good Phantom power supply. I used the Denecke PS-1a, and only loose about a db of gain, and the Phase response up top are not match (as seen in the loop through), not too bad though.


/R
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 21, 2013, 12:38:47 PM
Oh I remember, about the sensitivity.
So in the field if you measure at low level fare form the speakers (good candidate for a WL mic) how do you compensate? Lets say if you had the mic on a wire you would gain 50db, the Line6 you can only boost the output 12db so major difference there, and the mic still see really little level, close to its noise floor or?
/R
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 21, 2013, 01:24:17 PM
Oh I remember, about the sensitivity.
So in the field if you measure at low level fare form the speakers (good candidate for a WL mic) how do you compensate? Lets say if you had the mic on a wire you would gain 50db, the Line6 you can only boost the output 12db so major difference there, and the mic still see really little level, close to its noise floor or?
/R
Maybe I need to get some caffeine, but I'm still confused.  In the previous post to this one, you said you only lost about a dB of gain, and now you are saying that you are losing more with the M23 and the Line6 transmitter??  Sounds like some non-linearity in the measurement to me, unless I'm missing something!  :)
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 21, 2013, 02:07:40 PM
Maybe I need to get some caffeine, but I'm still confused.  In the previous post to this one, you said you only lost about a dB of gain, and now you are saying that you are losing more with the M23 and the Line6 transmitter??  Sounds like some non-linearity in the measurement to me, unless I'm missing something!  :)

He he well come to my world :)
I say that with the same gain on the I/O i loose about one db with the M23+PS1 (phantom supply)+Line6 output at 0db. Compared to a M23 straight on a wire.

Next im saying that the gain match between the Belt pack and the M23 is not IMO optimal, I can only in what i would consider normal conditions "hit" the belt pack with a low signal, one led lamp out of 5 (indicating signal). So if I used wired mic's I don't have to raise the output I could gain the balcony mic right? WIth the Line6 I can only boost the low signal hitting the mic 12db.
/R
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 21, 2013, 03:23:45 PM
He he well come to my world :)
I say that with the same gain on the I/O i loose about one db with the M23+PS1 (phantom supply)+Line6 output at 0db. Compared to a M23 straight on a wire.

Next im saying that the gain match between the Belt pack and the M23 is not IMO optimal, I can only in what i would consider normal conditions "hit" the belt pack with a low signal, one led lamp out of 5 (indicating signal). So if I used wired mic's I don't have to raise the output I could gain the balcony mic right? WIth the Line6 I can only boost the low signal hitting the mic 12db.
/R
Ah, ok, makes sense now, essentially the gain stage between the specific microphone (the M23) and transmitter is not optimal, as can be seen by the low meter level on the transmitter.  But in the work that we typically do in live sound, does it really matter?  Let me elaborate...

In the context of live sound measurement, we typically deal with a very limited dynamic range in sound reinforcement systems (consider the noise floor of a typical shed with the ventilation system on, and the upper limit of the output of a system), so where do you think the noise floor has an *effect* on measurements when using the M23 with the line 6?  Stimulus at 60 dBA, 70 dBA, 80 dBA, 90 dBA and so on?  Perhaps the moral of the story is to measure with stimulus that is "loud enough" for the output of the microphone being used.  Here's where dual channel measurements work extremely well, we can see how the noise floor influences our measurement by keeping an eye on the coherence curve and making sure it remains high enough to do our work.

To quantify this, find a *really* quiet room (eg recording studio), and with everything quiet, measure the noise floor with the microphone wired direct to your computer interface's preamp (take a snapshot in spectrum mode).  Then measure it with the same gain on the computer interface, but now with the line 6 system inserted in the path.  Now take a snapshot of the noise floor in the spectrum mode.  This should give us an answer to the above question for that specific type of microphone and it's sensitivity rating, provided that the signal path remains linear with all our measurements.  To test for linearity, feed a stimulus in the system, and increase it by 10 dB increments, take a snapshot of the transfer function of each, then offset the curves on top of each other.  They should remain the same in frequency response as the level increases.
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 22, 2013, 07:36:16 AM
Ah, ok, makes sense now, essentially the gain stage between the specific microphone (the M23) and transmitter is not optimal, as can be seen by the low meter level on the transmitter.  But in the work that we typically do in live sound, does it really matter?  Let me elaborate...

In the context of live sound measurement, we typically deal with a very limited dynamic range in sound reinforcement systems (consider the noise floor of a typical shed with the ventilation system on, and the upper limit of the output of a system), so where do you think the noise floor has an *effect* on measurements when using the M23 with the line 6?  Stimulus at 60 dBA, 70 dBA, 80 dBA, 90 dBA and so on?  Perhaps the moral of the story is to measure with stimulus that is "loud enough" for the output of the microphone being used.  Here's where dual channel measurements work extremely well, we can see how the noise floor influences our measurement by keeping an eye on the coherence curve and making sure it remains high enough to do our work.

To quantify this, find a *really* quiet room (eg recording studio), and with everything quiet, measure the noise floor with the microphone wired direct to your computer interface's preamp (take a snapshot in spectrum mode).  Then measure it with the same gain on the computer interface, but now with the line 6 system inserted in the path.  Now take a snapshot of the noise floor in the spectrum mode.  This should give us an answer to the above question for that specific type of microphone and it's sensitivity rating, provided that the signal path remains linear with all our measurements.  To test for linearity, feed a stimulus in the system, and increase it by 10 dB increments, take a snapshot of the transfer function of each, then offset the curves on top of each other.  They should remain the same in frequency response as the level increases.

My concern might not be valid i will do some more test in the parking a lot tomorrow. And also try to find a quiet place to do the back ground noise.

The concern just came from memory,where I have put the mic in a fare away location, and received not thing but noise, because i hit the belt pack with so low volume. WHat could have thrown me off guard is that with the Micw or DPA i get the same indication on the receiver (one led, signal) as a M23, so if you test at home 1 mtr. from the speaker its easy to get decent signal through. But if you take it straight to the field, that -15/-25db starting point quickly comes into play. I can see on my interface that i was at least -20db lower gain on the wired mic when doing the test at home, than my standard measurement preset. So again sorry for the confusion, I didn't compare apples to apples, but interwoven the results into the workflow. Athurs point still remains, do I measure loud enough and its the mic sensitive enough to pick the signal up. My concern might not be valid as Athur explaind above, As im proberly blinded buy the fact that im lock at a lower gain, and have not come up with a valid test procedure to show the difference. I would be more confident if I knew I had a good strong signal on the belt pack, and not that I might be on the edge of the noise floor.. That was why I would like to get some data from Don, to how strong a signal the belt pack would like to see, and how that translate into mic sensitivity.
I will run some more test as soon as i get time. Thanks for the patience.
/R
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 23, 2013, 09:22:22 AM
Did a test to day at about 17 mtrs. Guess the sensitivity is not much of a huge deal after all, at least not compared to having a good RF signal.
A few shots if I hit the belt pack with different level. 0db is the level of the M23. First is overlaid next it the individual.
/R

Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 23, 2013, 04:34:53 PM
Awesome stuff Rasmus!   :)   I see you got the quad display going in Smaart!   ;)
Just curious to know what SPL level was the mic measuring?
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 24, 2013, 03:09:55 AM
Awesome stuff Rasmus!   :)   I see you got the quad display going in Smaart!   ;)
Just curious to know what SPL level was the mic measuring?

Yes, my late cat Eddie (RIP) and I, found a bug that opened that view :) its later been patched so no need to try at home.

I was only about 68 dbA spl with the pink noise, funny how that sounds much louder in a concrete basement... I thought i was in to the 80's :) so no wonder i was close to a noise floor, when i compared to different mic's.

I do appoligize to everyone about my concerns,but I glad i took some time to get it tested. So my conclusion is that for a "cheap" measurement system the line6 i a good candidate (as Gustav all ready found out). If you use it with a good phantom supply, a quality mic and take great care that you have good wireless connection. I will try to do more range tests as i had to stop the other day, because the loading dock was busy with trucks coming and going, but 35 mtrs with direct line of sight transmitter to receiver was ok. But no doubt that as soon as the WL performance takes a hit, all kind of weird noise a cures (as expected i would guess).
/R
Title: Re: Wireless Mic System for measurements
Post by: Doug Fowler on September 24, 2013, 01:58:51 PM
Yes, my late cat Eddie (RIP) and I, found a bug that opened that view :) its later been patched so no need to try at home.

I was only about 68 dbA spl with the pink noise, funny how that sounds much louder in a concrete basement... I thought i was in to the 80's :) so no wonder i was close to a noise floor, when i compared to different mic's.

I do appoligize to everyone about my concerns,but I glad i took some time to get it tested. So my conclusion is that for a "cheap" measurement system the line6 i a good candidate (as Gustav all ready found out). If you use it with a good phantom supply, a quality mic and take great care that you have good wireless connection. I will try to do more range tests as i had to stop the other day, because the loading dock was busy with trucks coming and going, but 35 mtrs with direct line of sight transmitter to receiver was ok. But no doubt that as soon as the WL performance takes a hit, all kind of weird noise a cures (as expected i would guess).
/R

I have never found a situation using my Line6 setup in which I felt there was a S/N ratio.  I have used it past 200 feet, no problem.
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on September 24, 2013, 05:01:16 PM
I do appoligize to everyone about my concerns,but I glad i took some time to get it tested. So my conclusion is that for a "cheap" measurement system the line6 i a good candidate (as Gustav all ready found out). If you use it with a good phantom supply, a quality mic and take great care that you have good wireless connection. I will try to do more range tests as i had to stop the other day, because the loading dock was busy with trucks coming and going, but 35 mtrs with direct line of sight transmitter to receiver was ok. But no doubt that as soon as the WL performance takes a hit, all kind of weird noise a cures (as expected i would guess).
/R
It's always a good idea to test the tester.  Too often we charge ahead and start optimizing a system assuming our equipment is functioning fine, without checking it in advance.  I'm guilty of doing that occasionally, and I'm sure others here too!  Thanks for taking the time to do those tests, based on what I see in this thread, I might have to get some Line6 wirelesses for this purpose as well.  They certainly are quite affordable!
Title: Re: Wireless Mic System for measurements
Post by: David Sturzenbecher on September 24, 2013, 10:41:32 PM
I do appreciate all the input, and subsequent discussion. As I am already using the Lectrosonics unit, moving to the line 6 with supply seems quite clunky. Has any one done measurements on the ULX-D stuff? I hope a plug in transmitter could be in the works...
Title: Re: Wireless Mic System for measurements
Post by: Rasmus Rosenberg on September 26, 2013, 11:37:49 AM
I do appreciate all the input, and subsequent discussion. As I am already using the Lectrosonics unit, moving to the line 6 with supply seems quite clunky. Has any one done measurements on the ULX-D stuff? I hope a plug in transmitter could be in the works...
If you haven't read Langstons review
http://soundforums.net/product-reviews/4202-shure-ulx-d.html

Hope the future looks bright, as fare as i know the most limitations are in the firmware not hardware..  ::)

/R
Title: Re: Wireless Mic System for measurements
Post by: Alfredo Prada on November 01, 2014, 10:24:27 PM




I wonder if this new wireless plug in transmitter/receiver from Alesis would work in audio measurement.

http://www.alesis.com/print/print.php/256099
Title: Re: Wireless Mic System for measurements
Post by: Arthur Skudra on November 02, 2014, 12:53:21 AM



I wonder if this new wireless plug in transmitter/receiver from Alesis would work in audio measurement.

http://www.alesis.com/print/print.php/256099 (http://www.alesis.com/print/print.php/256099)
I know that the 60 foot range limitation of the Alesis wireless would make it completely pointless to use instead of regular mic cables for test and measurement work.  The main reason for going wireless is to locate the test mics at a distance away from your measurement rig in large rooms.
Title: Re: Wireless Mic System for measurements
Post by: Lee Buckalew on November 02, 2014, 07:07:01 AM
I do appreciate all the input, and subsequent discussion. As I am already using the Lectrosonics unit, moving to the line 6 with supply seems quite clunky. Has any one done measurements on the ULX-D stuff? I hope a plug in transmitter could be in the works...

David,
I guess I didn't see this post before.
Shure does not recommend the ULX-D for measurement work as they say there is some signal manipulation going on that will make it non-linear.

Lee
Title: Re: Wireless Mic System for measurements
Post by: David Sturzenbecher on November 02, 2014, 07:34:06 AM

David,
I guess I didn't see this post before.
Shure does not recommend the ULX-D for measurement work as they say there is some signal manipulation going on that will make it non-linear.

Lee

Lee, I heard the same from the Shure guys during Axient training a few months back. Quite a bummer. I have had to switch to a wire for my subwoofer measurements... Lots and lots of wire.


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