Discussions about the Bose S1 Pro system

Bose S1 Pro

Designed for musicians, DJs and general PA use, the S1 Pro is the ultimate all-in-one PA, floor monitor and practice amplifier that's ready to be your go-anywhere Bluetooth music system for nearly any occasion. 

This is the place to discuss the S1 Pro system.

I used two S1s at my gig last weekend and ran in stereo through the app.  I played music from my iPhone, which was connected via Bose Connect.  I set the bluetooth speaker volumes the same and their volume was equal. 

I ran two mics and an acoustic guitar through my T1 mixer, then trs from the T1 to the first S1 and then TRS from the output of the first S1 to the second.

HOWEVER, when I turned the channel 1 volume up on the first S1, the volume of bluetooth music on the second S1 got much louder!  I can't remember if I tried this with nothing plugged into channel 1, but I think I did and the issue was the same.

This seems like a bug to me, or poor design.  If I'm playing in stereo through bluetooth, the mixer channel should not affect the Bluetooth volume.

Is it user error?  If so, what?

Thanks!

Original Post

Hi DavidE2,

I just wired up things the way you described, but I need a little more detail to be sure I've replicated your setup. In the end, it probably doesn't matter.

DavidE2 posted:

I used two S1s at my gig last weekend and ran in stereo through the app.  I played music from my iPhone, which was connected via Bose Connect.  I set the bluetooth speaker volumes the same and their volume was equal. 

I did this too.



I ran two mics and an acoustic guitar through my T1 mixer, then trs from the T1 to the first S1

What channel did you connect the T1 to on the first S1 Pro system?

and then TRS from the output of the first S1 to the second.

What input did you connect to on the second S1 Pro?

Discussion:

Let's say you've got the Bluetooth connection going with equal volume on both S1 Pro systems and you have the Channel 3 volumes both at 12:00 o'clock.

With or without anything connected to S1 Pro channel 1, when you connect S1 Pro #1 Line out to S1 Pro #2 channel 1, when you turn up that channel to 12:00, the volume of the Bluetooth signal will get much louder.

Here's why:

On S1 Pro #1, the Line Out includes the Bluetooth signal on Channel 3.

When you connect S1 Pro #1 to S1 Pro #2, you are sending the Bluetooth signal from #1 to #2 through the wired connection.

The result is: You have added the Bluetooth signal from #1 to #2, and the result will be - the Bluetooth volume on #2 will be louder.

If you are going to use a wired connection between the S1 Pro systems, send the mono Bluetooth signal only to S1 Pro #1.



HOWEVER, when I turned the channel 1 volume up on the first S1, the volume of bluetooth music on the second S1 got much louder! 

I can't replicate this - but if I turn up the volume on S1 Pro #2, then the Bluetooth signal gets disproportionately loud.

I can't remember if I tried this with nothing plugged into channel 1, but I think I did and the issue was the same.

This would happen if you turned up the first S1 Pro channel 3.



This seems like a bug to me, or poor design.  If I'm playing in stereo through bluetooth, the mixer channel should not affect the Bluetooth volume.

Is it user error?  If so, what?

Thanks!

The S1 Pro systems are engineered to work this way.

A wired connection between the two S1 Pro systems sends the full mix of the first S1 Pro (Channels 1, 2, and 3) to the second S1 Pro.  If you are running a Bluetooth signal in the first S1 Pro, that Bluetooth signal will get sent to the second S1 Pro.

Typically, the reason to connect something to the S1 Pro Line Out is to send the full mix to a second system. That's what's happening here. That works great when you are sending the output of an S1 Pro to a house system, or to a second S1 Pro to extend your coverage.

I understand you might want to preserve the stereo image in the Bluetooth, but if you're connecting them together to send the T1 output to both in dual mono.  The stereo image is going to be obscured anyway.

ST

"I understand you might want to preserve the stereo image in the Bluetooth, but if you're connecting them together to send the T1 output to both in dual mono.  The stereo image is going to be obscured anyway."

I hate to say it, but I think this is a dumb design.  I'm using a pair of S1s with my T1 for a duo gig (two vocals, one acoustic guitar).  I want to play canned music in stereo before we start and during breaks.  A better design would be to not put channel 3 in the output so the stereo image isn't screwed up.  Maybe make it switchable through the app if it's not hard-wired this way.  My opinion only, but it makes me less happy for my gigging use.

 

Hi DavidE2,

I understand why you want a different behaviour. For your application, you can get the result you want by turning off the connection between the S1 Pro systems.

Turn down the channel from the line out from the first S1 Pro system, on the second S1 Pro system. For example: if you are connecting to the second S1 Pro system with channel 1, turn channel 1 down when you are playing canned music. It's an added inconvenience, but you're probably only doing that a few times per show.

The Bose Connect app controls how your Bluetooth device sends audio to the S1 Pro systems. It does not control anything on the S1 Pro systems. 

ST

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