L1 Model II

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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.

Compact Extensions Getting Difficult to Insert

I'm noticing that my Compact's extensions & speaker section are getting harder & harder to insert & separate. I'll spray some silicone spray on them today to see if it helps. It's worse on the base - especially where the wings slide into the grooves on the back of the extensions & speaker.


Photos (6)
Original Post
Hi Tom,

I have not tried this, but I have this old old memory that mineral oil might be good for plastic:plastic friction.

I'm going to see if I can figure out where that thought originated.

Edit: I found this mineral oil.

Okay - so mineral oil is not to be used with latex. (you can't believe what you get if you search for 'mineral oil as lubricant'). But anyway - I didn't see any contraindications for using it with plastic.

Silicon Spray - like WD40? or something else?


Originally WD 40 faqs:
What surfaces or materials are OK to use WD-40 on?

WD-40 can be used on just about everything. It is safe for metal, rubber, wood and plastic. WD-40 can be applied to painted metal surfaces without harming the paint. Polycarbonate and clear polystyrene plastic are among the few surfaces on which to avoid using a petroleum-based product like WD-40.
I'm not a big fan of WD40. I don't like that it tends to end up everywhere, and I don't like the smell. Why wouldn't you use it for this application - just curious.


PS - just moments before you posted I added a note from the WD 40 site above.
I'm curious as to why the extensions are getting more difficult to assemble or disassemble.

Usually with wear, things tend to fit looser.

Can you see abrasions on any of the contact surfaces?

Is dirt or dust a factor?

Not knowing exactly what kind of plastic Bose is using I think this might be a question for "Ask Bose for Help". Anything that might collect dust, or soften the plastic surface could, in the long run, make things worse.

Mine seem to fit snug and secure, I wouldn't describe them as sticky or difficult in any manner.

I too have noticed that the Compact Extensions bind a little. I'm guessing that the plastic surfaces are getting roughed up with use. Rougher surfaces could be creating more friction.

Tom, you've given us some nice close ups of things in past. Any chance you could show us the ends of the extensions and the speaker array?

I know you're going to be busy. No rush buddy.
Some type of automotive wax (which usually contain silicone) might do the trick. WD40 or any other spray lubricant can be detrimental to some types of plastic and harmless to others. Its the solvents in these type products that could possible be harmful.
My compact seems difficult to get apart brand new and I thought it would probably loosen up with use, which I now think it might not.
Wtching this discussion and appreciate the comments shared thus far. The components of the L1 Compact system are designed to fit together reasonably "snug" and we would also expect them to relax a bit over time. There is definetly a balance to be had here. I will see if anyone from the engineering team has any reccommendations.

Thanks Neil
Sorry it took so long to get some photos up.

Here's a shot of the rails. This plastic really shows where the contact is made. Notice also the contact in the inner walls of the well.

I think it is a combination of the "roughening" up of all these surfaces over time that makes it hard to remove the components.
Hi Tom,

Thanks for doing the photos.

Could you get a shot of the sections that touch between the two extensions and the extension and the speaker array?

I'm having trouble with my hands these days, and it is very difficult for me to get the extensions apart. The trouble is just getting a firm enough grip on the speaker array to get it off the extension, or to separate the two extensions.

Right now,

  • As I remove the Speaker Array, the whole assembly (speaker array and two extensions) come out of the Power Stand.

  • If I can get the Speaker Array off the top extension, then

  • As I try to remove the top extension, the bottom extension reluctantly comes with it out of the Power Stand.

  • That's okay, but I am struggling to get the extensions apart. That part is no fun because I have to use one hand on each extension. That's a bit of a struggle for me right now.

I know that part of my problem is because of an issue I'm having with my hands (probably too much typing), but I wonder if you are experiencing difficulty getting the pieces separated.

It's hard to see & photograph much wear between the extensions. You mainly see a little wear on the outside ribs at the insertion point. Mine aren't showing the wear much now because of recent application of silicone spray.

As to your problem separating the parts, the first place I used the silicone spray was between the extensions & between the array & extensions. It works very well here but doesn't last more than a few days with my usage.

The latest problem I've been having is that I lift the powerstand up when I try to remove the extensions from the array. That's why I posted the latest pictures & have been using silicone spray here.

The plastic used in the parts & the mating surface structure just seems to bind more easily with wear than the plastics used in the previous L1®'s. With my usage (up to 3 or 4 gigs daily) I am probably getting a max-usage scenario that most players won't see for a year or more. Robert Warden talked about the plastic used in one of the videos in the Compact section of the Bose site. He said it was chosen for its durability & light weight.
I've also been wondering if there could be a finger divot or somewhere else to grip the top extension when removing it from the bottom extension. The finger slot in the bottom extension is appropriately placed ergonomically, but the lack of one in the top makes it difficult to grip the top piece. When my hands are tired I have difficulty removing it as well.

I'm also afraid I may fling the array across the stage when it sticks tightly in the extension.

I'll probably just keep using the silicone spray until the pieces (hopefully) loosen up. I also thought of taking one of my fingernail boards to smooth edges & wear points out occasionally. That's a lot of detail work though.
For those folks that are experiencing this issue we can confirm that using a “dry lubricant with Teflon” would be an acceptable solution. This can be sprayed onto a cloth and wiped onto the inside of the extension & array tracks and the inside of the lower extension electrical housing. Note: Please do not spray directly near the electrical connecions:

There are many manufactures that offer similar products, one in particular that we have used in the past with success is the TRI−FLOW* Superior Dry Lubricant with Teflon* produced by Sherman Williams, please note that we do not endorse any one product in particular – we are merely trying to provide you with a point of reference.

I hope this information is helpful.

Thank you,

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