I’m also having this problem ... huge white noise when connected to my Bose L1 series 2 PA via the analogue input (as the digital connection is not a viable option according to the Bose engineers)

Other problems are:

R mono out is not mono .... I checked this by feeding a stereo signal to 2 channels  panned L & R and muting the Right channel to see that none of the Left panned signal is fed through the mono out....frustrating. 

Lack of any stereo channels with dedicated attenuator is also a massive oversight ... I have 2 playback devices meaning I’m chewing up 4 channels ... frustrating ..

 

Original Post

This is s very good question. I tried to find it in the manual but it doesn't seem to be there. According to the manual the analogue input is a TRS input. BUT ...... is this a balanced mono input? or can it be treated as a UNbalanced stereo input?

BTW Angie. Just in case, make sure your signal leads are as far as possible to the mains lead, if not, make sure they at least cross at right angles.

Hi, Angie Sublime.

Welcome to the Bose Portable PA Community.

Angie Sublime posted:

I’m also having this problem ... huge white noise when connected to my Bose L1 series 2 PA via the analogue input (as the digital connection is not a viable option according to the Bose engineers)

For optimal gain staging between the T8S and an L1 Model II

  1. Connect the T8S Main Output to the L1 Model II Analog Input
  2. Set the Analog Input trim to 9:00-10:00 o'clock. Control the volume with the Master Volume on the T8S mixer.
    Model 1S/II Analog Input for T4S/T8S
    If you set the input trim higher than 10:00 o'clock, you may have excessive line noise.
  3. If the Signal/Clip indicator glows red, decrease the Trim level so that it glows only green or yellow.

Control the volume with the T8S.

Source: T8S to One L1 Model II



Other problems are:

R mono out is not mono .... I checked this by feeding a stereo signal to 2 channels  panned L & R and muting the Right channel to see that none of the Left panned signal is fed through the mono out....frustrating. 

Yes.

Mono Output

On the back of ToneMatch Mixer[1]s, there is an indication below the Right output (MONO).

Please note:
There is no hardwired summed mono output on the ToneMatch mixers. Any input signal that is panned hard Left will not be heard through the Right output. To get a mono output please see below.

General Information

As you move the pan control away from the center, the sound level increases slightly in one direction and decreases in the other. If you pan inputs hard to one side (e.g., Right) and the Right output will be slightly louder (theoretically, up to +3 dB louder) than if you had panned the inputs up the middle. And panned hard Right - there will be no signal at the Left Output.

T8S ToneMatch® mixer

  • Pan all inputs hard RIGHT
  • Use the ¼ inch (6mm) Right Output to a powered loudspeaker (e.g. S1 Pro, L1® Compact, F1 Model 812). For best results use a ¼ inch (6mm) jack Tip-Ring-Sleeve cable

OR

  • Use the XLR Right Output to powered a loudspeaker (e.g. S1 Pro, F1 Model 812). or L1® Compact with XLR to ¼ inch (6mm) jack Tip-Ring-Sleeve.

Source: T8S Mono Output



Lack of any stereo channels with dedicated attenuator is also a massive oversight ... I have 2 playback devices meaning I’m chewing up 4 channels ... frustrating ..

I'm sorry. Can you get a mono output from the playback devices?

If not, the closest you can get to what you want is to use the Aux inputs 9/10 and pan them both RIGHT. However, except for Level and Pan controls, there is no processing for the Aux inputs.  The Aux inputs work best when you will control volume and tone adjustments at the source.

You'll still need two channels for the other playback device.

ST

Hi, Perro2019,

Perro2019 posted:

This is s very good question. I tried to find it in the manual but it doesn't seem to be there. According to the manual the analogue input is a TRS input. BUT ...... is this a balanced mono input? or can it be treated as a UNbalanced stereo input?

All the 1/4 inch (6.3 mm) Tip-Ring-Sleeve inputs on the T8S are balanced mono. So is the L1 Model II Power Stand Analog input. 

Can a stereo signal be used with a balanced mono input?

No. A ¼ inch Tip-Ring-Sleeve connector carrying a stereo signal should not be used with the analog inputs on the T4S/T8S or analog input on the Model II.

Even though a ¼ inch Tip-Ring-Sleeve connector can carry a stereo signal this is not how this physical connection is used on these Bose devices.

The analog inputs are balanced, and will subtract the Left and Right signals on a stereo cable and you will hear an L-R (Left minus Right) signal in the Bose device.

For more information see: 

Balanced vs Unbalanced 

Thanks,

ST

ST

Thanks for your time to answer my queries  ...  

Right Mono Out

One wonders why Bose bothers to label the Right output mono ... causes confusion.

 

On Hiss Noise when T8 is connected via analogue in with balance TRS cable to my L1 Model 11 PA- trim is set at less than 9 O’clock and I’m very cautious with clipping/ hot signals monitoring both input and output ...  still have the noise but am sending my equipment to Bose to check for problems and I’m sure their techs will get to the source of any problems.  I have ways had exceptional service from Bose despite being located in the NT ....   

 

Lack of stereo input channels as available on the T1 tone match engine   is still in my opinion a frustration and oversight.   

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