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Author Topic: 3.5mm from iPod to TA4F into wireless transmitter.  (Read 1860 times)

Debbie Dunkley

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3.5mm from iPod to TA4F into wireless transmitter.
« on: January 18, 2020, 09:08:03 pm »

Would this work?

As most of you know, I sing through a wireless headset from FOH position.
I use a Shure system - pack and mic are TA4F connectors. I would like to play something from my iPod through the PA from my position and I have a short cable that was used for a Line 6 wireless guitar system. I could unplug my mic to do this OR use a second system I take as back up.
If I put a 1/4' to 3.5mm (1/8") adaptor on the 1/4" end to fit my iPod headphone output and plug the TA4F end into the transmitter pack, would this work without causing problems due to impedance mis-match etc.?

cable

adaptor
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Mark Cadwallader

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #1 on: January 18, 2020, 09:17:34 pm »

Debbie, I think you would want to sum the stereo output from your iPad before you went into the 1/4" TS to TQ4 adapter. 

Something like an EWI "SUM-PSPP" cable, and change the 1/4" TS male end to a 1/4" TS female end?  (Sorry; I don't know how to insert a link from my iPhone to show the cable I'm thinking of. )
« Last Edit: January 18, 2020, 09:26:05 pm by Mark Cadwallader »
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #2 on: January 18, 2020, 09:30:01 pm »

Debbie, I think you would want to sum the stereo output from your iPad before you went into the 1/4" TS to TQ4 adapter. 

Something like an EWI "SUM-PSPP" cable, and change the 1/4" TS male end to a 1/4" TS female end?  (Sorry; I don't know how to insert a link from my iPhone to show the cable I'm thinking of. )

The iPod has the option to switch to mono output so there isn't a problem with converting stereo to mono.
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Mike Caldwell

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #3 on: January 18, 2020, 09:42:37 pm »

The iPod has the option to switch to mono output so there isn't a problem with converting stereo to mono.

In that case.......
It sounds like the guitar cable is expendable, cut the 1/4 inch plug off and replace it with a 1/8 inch trs plug but only connect to the tip and ground sleeve.
« Last Edit: January 18, 2020, 09:47:26 pm by Mike Caldwell »
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #4 on: January 18, 2020, 09:54:10 pm »

In that case.......
It sounds like the guitar cable is expendable, cut the 1/4 inch plug off and replace it with a 1/8 inch trs plug but only connect to the tip and ground sleeve.

The adaptor does the same thing and leaves me the option to use the cable for an instrument in the future.
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Scott Helmke

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #5 on: January 18, 2020, 10:00:21 pm »

Disclosure, my company (often me personally) makes these cables:
https://tcfurlong.com/product/icable-minitrs-ta4f-3-ft/
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #6 on: January 18, 2020, 10:09:43 pm »

Disclosure, my company (often me personally) makes these cables:
https://tcfurlong.com/product/icable-minitrs-ta4f-3-ft/

Thanks Scott -This would be a good option if I needed to sum the stereo signal and didn't want to use an a adaptor - it looks like a nice product .... but if what I have will work without causing damage (which I'm trying to establish), I'd be foolish to not at least try it. 
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Jordan Wolf

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #7 on: January 18, 2020, 11:46:15 pm »

I have used a XLR(f)-TA4F adapter (available from Shure) and a DI box for this purpose.

The TC Furlong adapters would be my choice for a ready-made solution, though.
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #8 on: January 19, 2020, 12:13:58 am »

Taken directly from the Shure website support page:

How can I take the audio from my computer headphone jack and get it into the sound system using a wireless mic system?
Three things have to happen:
1)     The audio signal level from the headphone jack must be attenuated (reduced) to Mic level.
2)     The stereo audio signal from the headphone jack must be combined into a monaural signal.
3)     The audio signal from the headphone jack must connect to the bodypack transmitter using a TA4F connector.
There are multiple ways to solve this situation, so lets examine one method.
There are devices sold that provide #1 and #2 above.  One such device is the LTI 100 manufactured by Rapco.  The audio signal leaves the LTI 100 on a male XLR connector.  Connect this male XLR output to the Shure transmitter using the Shure cable WA310. Voila! This method also works for the headphone output of an iPod, an iPad, or other device that has a 3.5 mm headphone jack.
Also, pro audio dealer T.C. Furlong, www.tcfurlong.com, offers a cable fabricated specifically to provide this function.

So #1 concerns me - the other 2, I already have in place.
How important is this? Could I simply not make sure to keep the output level down of the iPod or is that not enough to appropriately attenuate the signal from the iPod?
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Jean-Pierre Coetzee

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #9 on: January 19, 2020, 02:24:55 am »

I would just turn it down and try it. I really don't think you will be blowing anything up. BTW does the pack provide phantom power? I can't remember if that is on a different pin for beltpacks but considering it's not mentioned by Shure I'm pretty sure that it's not a problem.
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Keith Broughton

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #10 on: January 19, 2020, 07:43:27 am »

https://pinouts.ru/Audio-Video-Hardware/ta4_shure_pinout.shtml

Here is a wiring diagram that shows you can input audio on pins 1 and 3 without bias voltage.
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Mike Caldwell

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #11 on: January 19, 2020, 07:43:55 am »

What model Shure system do you have?

Dennis Wiggins

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #12 on: January 19, 2020, 08:59:38 am »

1)     The audio signal level from the headphone jack must be attenuated (reduced) to Mic level.

Check your transmitter pack to see if it has a sensitivity switch.

I set the transmitter to -10 and, because I was driving it with an aux out mains out, I had to use an additional  -40dB attenuator between the aux out and the transmitter.

https://forums.prosoundweb.com/index.php/topic,172606.msg1590397.html#msg1590397

« Last Edit: January 19, 2020, 11:41:05 am by Dennis Wiggins »
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Mike Caldwell

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #13 on: January 19, 2020, 12:15:37 pm »

Check your transmitter pack to see if it has a sensitivity switch.

I set the transmitter to -10 and, because I was driving it with an aux out mains out, I had to use an additional  -40dB attenuator between the aux out and the transmitter.

https://forums.prosoundweb.com/index.php/topic,172606.msg1590397.html#msg1590397

Some have the switch on the side others have the old fashioned recessed adjustment pot, not sure what the big boy Shure packs have for input adjustment.

Robert Lofgren

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #14 on: January 19, 2020, 02:59:57 pm »

Most xmitters expect mic level signals and this means that the output noise from the ipod headphone amp will probably become quite noticeable. I would pad the signal so that the ipod noise would become attenuated. On the plus side it will protect the ipod from any transmitter pack bias voltage.
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #15 on: January 19, 2020, 09:10:41 pm »

System is the basic BLX rack version which I know isn't favored here BUT it has been fantastic - never let me down apart from when I mounted the antenna too close to the iem transmitters. Once I moved them, I never got any problems. I also have the standard BLX Receivers too and they have also never let me down.
Yes the pack has a sensitivity knob on it which of course I could turn all the way down if need be.
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Les Kanekuni

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #16 on: January 19, 2020, 11:45:57 pm »

Would this work?

As most of you know, I sing through a wireless headset from FOH position.
I use a Shure system - pack and mic are TA4F connectors. I would like to play something from my iPod through the PA from my position and I have a short cable that was used for a Line 6 wireless guitar system. I could unplug my mic to do this OR use a second system I take as back up.
If I put a 1/4' to 3.5mm (1/8") adaptor on the 1/4" end to fit my iPod headphone output and plug the TA4F end into the transmitter pack, would this work without causing problems due to impedance mis-match etc.?

cable

Am I missing something?  Since you're already at FOH, can't you just plug your iPod into an available channel on the mixer?

adaptor
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #17 on: January 20, 2020, 09:14:55 am »



 This is from FOH position using only iPads to mix. I am totally wireless. Mixer is stage side.
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Scott Helmke

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #18 on: January 20, 2020, 09:42:32 am »

The output from a phone or whatever isn't much different than a guitar signal, and most or maybe all Shure transmitters have some kind of gain adjust to deal with it.
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #19 on: January 20, 2020, 10:31:19 am »

The output from a phone or whatever isn't much different than a guitar signal, and most or maybe all Shure transmitters have some kind of gain adjust to deal with it.

Thanks Scott. I'll give it a try.
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Tim Hite

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #20 on: January 20, 2020, 02:12:54 pm »

Most manufacturers have XLR plug on TX units that you can add. Turns any handheld into a wireless system and can plug into a DI for anything else.

Lectrosonics HMa and Sennheiser SKP 100. Pick the appropriate version for your wireless.
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Debbie Dunkley

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Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #21 on: January 21, 2020, 01:59:21 pm »

Thanks everyone...
I just went for it and used the items I have that I linked to in my 1st post. It works GREAT. No noise at all - nice and clean with PLENTY of headroom.
To be safe I turned down the gain on the pack to start but found I had to wind it back up and even higher than where I usually have my mic set. My headset mic is VERY high output though so that makes sense.
I have 2 systems so I can dedicate one to the iPad without messing around with my mic pack.

Previously I had tried a Line 6 guitar system but I got drop out literally feet from the stage so that didn't work for me.
I also have an On Stage bluetooth XLR receiver I could use but it is only 2.4ghz and I don't want to risk it.
Then there is my Apple Play option through my router - I did try playing break music through it once a long time ago but I got drop out so I never used it again.

Using my Shure BLX system should work well for me- I never get drop out with my mic.
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ProSoundWeb Community

Re: 3.5mm from iPod to TA4F into wireless transmitter.
« Reply #21 on: January 21, 2020, 01:59:21 pm »


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