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neve1064
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May 30, 2020

T4S/T8S Stereo and Mono with the headphone jack

The T4S is confusing to use and almost as much so as this Bose community is; navigating it is unintuitive at best but still appreciated for being a thing. 

I want to state something to those who will end up spending too much time on the subject of “Stereo” or “Stereo Summing to mono output”.  Here are a few facts:

1. The T4S headphone output is always in stereo NO MATTER WHAT YOU DO TO ANY KNOBS OR BUTTONS. PERIOD. 

2. Using an in-ear monitoring setup in a true stereo scenario with the T4S is a complete impossibility if you are using one speaker as an output.  Period. 

3. If you want to have the ability to have a stereo monitor mix meaning a different signal in your left in-ear bud than your right in-ear bud, you have to be using two front-of-house speakers.  Why? Read on. 

The Bose T4S uses the Right main digital output to get power FROM the LII base unit and at the same time sends ALL input channels, and I mean all of them, to this RIGHT output back to the base unit. If ANY channel is panned hard left, you will not hear it in the LII speaker. 

To listen in true stereo, you need two speakers and each one needs to receive its own input that is different than the other speakers’ input.  The T4S can send a different outputs to its the left and right outputs but if you have only one LII, you have to settle with only hearing the right side in this example. This means you have to make sure all T4S channels’ pan settings are at least 12 o’clock center or panned to the right fully or to some degree. 

Here is where it gets really weird though; the headphone output disregards what pan settings you choose and it supposedly broadcasts in stereo but not really because when you listen back on an in-ear monitors that are set up for a stereo output, you hear the T4S’s left output in the right ear bud and vice-versa.  

This is totally weird and I’m sure there is a logical reason but I’m going back to a simpler mixer with outboard effects so I can easily send a stereo output to one speaker and still monitor in stereo.  No disrespect to Bose T4S. I’ve been using Bose products for a decade and have made a lot of money doing so but now that I have had to incorporate in ear monitoring, I’ve learned using a Bose T4S is not the way to go if you are using only one speaker for FOH. 

6 REPLIES 6
Faye
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Jan 11, 2020

Re: T4S/T8S Stereo and Mono with the headphone jack

Forgive my unlearned question but I am confused.  Why would a musician need an in-ear monitor with this system?  That's what we like best about our BOSE system... No monitors needed.

neve1064
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May 30, 2020

Re: T4S/T8S Stereo and Mono with the headphone jack

No question is a question not worth asking. Where I gig, the acoustics ram frequencies into ears. After ten years in this one room, my ears hurt from ringing.  I need to control what I’m hearing.  It’s possible to use in-ears in mono ( both ears hearing the exact same thing) but I’m spoiled by the thought of monitoring in stereo. 

ST - Pro
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May 11, 2020

Re: T4S/T8S Stereo and Mono with the headphone jack

Hi, neve1064.

Welcome to the Bose Portable PA Community.

As you've noted, the headphone output gives you the Master mix (left and right). If you want something different you can use one or both of the Aux outputs.

Here's an article that shows you how that works.

T4S Aux Outputs



ST

ST - Pro
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May 11, 2020

Re: T4S/T8S Stereo and Mono with the headphone jack

Hi, neve1064.

Welcome to the Bose Portable PA Community.

As you've noted, the headphone output gives you the Master mix (left and right). If you want something different you can use one or both of the Aux outputs.

Here's an article that shows you how that works.

T4S Aux Outputs



ST

ScubaBadger
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Sep 16, 2019

Re: T4S/T8S Stereo and Mono with the headphone jack

@neve1064 posted:

The T4S is confusing to use and almost as much so as this Bose community is; navigating it is unintuitive at best but still appreciated for being a thing. 

I want to state something to those who will end up spending too much time on the subject of “Stereo” or “Stereo Summing to mono output”.  Here are a few facts:

1. The T4S headphone output is always in stereo NO MATTER WHAT YOU DO TO ANY KNOBS OR BUTTONS. PERIOD. 

2. Using an in-ear monitoring setup in a true stereo scenario with the T4S is a complete impossibility if you are using one speaker as an output.  Period. 

3. If you want to have the ability to have a stereo monitor mix meaning a different signal in your left in-ear bud than your right in-ear bud, you have to be using two front-of-house speakers.  Why? Read on. 

The Bose T4S uses the Right main digital output to get power FROM the LII base unit and at the same time sends ALL input channels, and I mean all of them, to this RIGHT output back to the base unit. If ANY channel is panned hard left, you will not hear it in the LII speaker. 

To listen in true stereo, you need two speakers and each one needs to receive its own input that is different than the other speakers’ input.  The T4S can send a different outputs to its the left and right outputs but if you have only one LII, you have to settle with only hearing the right side in this example. This means you have to make sure all T4S channels’ pan settings are at least 12 o’clock center or panned to the right fully or to some degree. 

Here is where it gets really weird though; the headphone output disregards what pan settings you choose and it supposedly broadcasts in stereo but not really because when you listen back on an in-ear monitors that are set up for a stereo output, you hear the T4S’s left output in the right ear bud and vice-versa.  

This is totally weird and I’m sure there is a logical reason but I’m going back to a simpler mixer with outboard effects so I can easily send a stereo output to one speaker and still monitor in stereo.  No disrespect to Bose T4S. I’ve been using Bose products for a decade and have made a lot of money doing so but now that I have had to incorporate in ear monitoring, I’ve learned using a Bose T4S is not the way to go if you are using only one speaker for FOH. 

Can I give you a suggestion for one of your notes.

I live stream shows to the internet on Sundays and I use an audio interface that is stereo even tho I only use 1 x L1 column in my kitchen diner.

I set the T4S up with a scene that would normally feed a stereo signal to two L1 columns. I power the T4S with a mains adapter.

I use the output jacks giving the stereo signal to the audio interface for the broadcast - and it is still stereo. I could if I wanted use the stereo headphone output - but the jacks work just fine.

Yes - I'm missing the full stereo sound in my kitchen but I can and do live with that as my audience is getting the full stereo sound direct out of the T4S which is way better than a phone next to the speaker.

neve1064
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May 30, 2020

Re: T4S/T8S Stereo and Mono with the headphone jack

Your suggestion is appreciated- thank you! 

my issue was that I wasn’t getting through stereo and less I pay and my tracks for hard left and right. The problem with that was, the Bose L II was only receiving the right side of the tracks. My backing tracks are in stereo, unfortunately. So yes, your solution does work for streaming but in my scenario it isn’t a solution. However I have found a solution. I took the left quarter-inch main output and fed it to the base LII’s Quarter inch input. This way I was able to force the base unit to hear both the left and right signal. This allowed me to pay all my tracks hard left and right and get a true stereo image in my in your monitors. The effects sounds great like this in the voice is nice and centered. It’s not an elegant solution but it works!