L1 Model II

Let's talk about the L1® Portable Line Array Systems

Using proprietary Bose® technology, L1 systems combine  PA and monitors into a single, highly portable unit. The  loudspeaker can be positioned behind or to the side —and you hear what the audience hears.

Highly portable PA and monitor combined for solo performers, DJs and general-purpose use. Fixed vertical control with 180° horizontal coverage Reduced vulnerability to feedback.

Three systems to choose from (Compact, Model 1S, Model II)
Two passive bass module options (B1 or B2)
Consistent coverage and tonal balance, portability and easy setup.

Hoping that revealing my ignorance might help someone else someday.

I have a new L1, B1, T8S. I noticed that I was getting seemingly random volume loss in Channel 3 (acoustic guitar). I couldn’t figure out whether I had a Bose issue or a guitar issue. Turns out it was a “me” issue.

Apparently, I was occasionally (and unintentionally) powering up my system components in the wrong order.

The set up: My guitar plugs directly into a vocal harmonizer (for key detection), which then sends the unprocessed guitar signal out to the T8S Channel 3. I think I was causing a voltage fluctuation in the T8S when I’d randomly power up the harmonizer AFTER there was power on the T8S. No other channels seemed to be affected, even though the harmonizer vocal goes to a separate mixer channel. I finally got a clue when I heard a faint speaker pop when the harmonizer powered up.

Here’s the power-up order that seems to fix the issue: Pedal Board > T8S > L1. Powering down in the opposite order.

Anyway, here’s to rookie screw-ups! So glad I didn’t call customer support and make a scene. That woulda turned out to be somewhat embarrassing.



Original Post

Hi, Tom.

Thanks for sharing your experience with us.  That would have been a tough one to diagnose.

Here’s the power-up order that seems to fix the issue: Pedal Board > T8S > L1. Powering down in the opposite order.

Yes you're right. The best practice for turning on devices is to follow the signal flow from source to output.

Thanks again.


Hi Tom,

Thanks for sharing this. It's this sort of input which can really be helpful to many who are trying to find their feet in this field.

Powering up: Source to Output

Powering off: Reverse order Output to Source. 

This way you avoid the switching on/off signal surges which can cause the "thumps" from the loudspeakers which many of us have heard at some time or other.


Add Reply

Likes (0)
Having trouble signing in?

We recently updated our sign-in procedure and if you have old sign-in data cached, this can create a problem. Please:

  1. Clear your browser cache and cookies
  2. Then close the browser (not just the window)
  3. Open the browser and try again
Thank you

Please make sure that your profile is up to date