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.

Noisy Mic input on 'Compact'

I have just recieved my new'Compact', and I'm really suprised at just how much noise there is on the mic input! With the volume at '12o clock' even without a mic plugged in it is unuseably noisy.
When I plug in my Tonematch it works fine I am using a Sennheiser e945 which is just fine with my L1 mk11 and tonematch!
I bought this to use simply on it's own in very small restaurants, but without the Tonematch it is useless. I think that perhaps the mic preamp is suspect!
The store say they agree that the Compacts are very noisy, so there is no point in my changing it for another.
Does any one find this is a problem?

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Original Post
From what I've read, the "12 o'clock" on Channel 1 of the Compact is a very high gain setting ... would be really loud -- and thus "12 o'clock" should not be considered the default (or "normal") position for that knob.

Maybe something like 8 or 9 "o-clock" (e.g. ~1/4 of max) should be thought of as the default position ... or leave it completely down (off) when no mic is plugged in -- which may be a good practice when connecting/disconnecting a mic anyway.

I suspect that channel 1 has a really wide gain-range to handle a wide variety of possible microphone inputs without using a separate Trim gain stage.

Hint to Bose: Have the factory ship the Compact L1's with Channel 1 in the "off" (least gain) position.
Hi workshop05,

Plug in a microphone and try it.

I mean, actually use the microphone and set the Channel Volume at the level that sounds right for the microphone when you are singing at performance volume.



The noise should be neglible.



Oh, when I do this volume setting is well below 12:00 o'clock. 12:00 o'clock is very very loud.
As I have mentioned before, if you really want to be happy with your new compact then buy a tonematch and power supply and you will be in heaven. Use the compact mic channel 1 only as an emergency and take St 's advice on setting the volume level in accord to your performance.

AJ
Music is neither new or old it "just is"
Hi workshop

It does sound like your unit is working correctly. First and most importantly, please make sure taht you have a microphone connected when you turn up the Ch1 Volume control. As other members of the community pointed out, when the CH1 volume control is set to 12:00 the system is extremely loud. Below are some additional details as well as guidlines for adjusting your levels. Please read through my post and let me know if you have any further questions.

We’ve designed the L1 Compact with the goal of providing a simple user interface for both musicians and general purpose users. You will notice there is volume control for each channel but no overall master volume. This means that the power amp section is always at full gain. In this configuration the Ch1 and Ch2 volume controls are effectively acting as trim controls. The benefit of a trim control is that you don’t need to significant gain in order to drive the L1 Compact to full output.

The L1 Compact mic channel is designed to work with a wide range of handheld microphones from popular mics like a Shure Beta 58A all the way to lower sensitivity microphones like the Sennheiser e8155. As you may know sensitivity can vary between microphones so we’ve elected to include a higher amount of gain on the mic channel.

In order to maximize signal to noise (when using the L1 Compact CH1 MIC CHANNEL) we recommend that you determine the loudest level that is required for your room/application and follow the steps below.

1.) Plug in your microphone to CH1
2.) Turn the L1 Compact CH1 VOLUME/TRIM to 9 o’clock
3.) Speak into the mic at your loudest volume and softest volume
4.) Adjust the CH1 VOLUME/TRIM control to a setting that will work for your loud and soft vocal passages.
5.) Remember since this is effectively a trim control (and the master is at full) you don’t need to build additional headroom into the system.
6.) Additional tip: In most cases, the CH1 Mic Pre has more gain than you will ever need, so if you don’t need the extra gain, don’t use it as it will only introduce noise.

Thanks,
Craig
I really am trying to get enough gain on channel 1,with the minimum amount of hiss . To get a usable amount of volume on my mic (sennheiser e945)at a gig I need to be up around 11 o'clock, with the treble taken way off, and the sound then is really wooley. I'm wondering whether to use a di box, or perhaps another preamp. I used the Compact last night,first with the Tonematch, then without. I just couldnt get the volume or tone by going staight into channel 1.
It seem a real shame,as channel 2 'straight in' works great, and is really quiet! And we soon learn to live without reverb. Ifeel that channel 1 is really spoiling what otherwise is great setup.
Hi workshop05

EDIT - workshop05 amended his post above. The following is no longer directly applicable.

quote:
Originally posted by workshop05:
I really am trying to get enough gain on channel 2,with the minimum amount of hiss .

Are you connecting your microphone to Channel 2?

That input (Compact Channel 2) is intended for instruments, mixers, or a T1®. A microphone straight into Channel 2 will probably not have enough gain to drive that channel well. ***


quote:


To get a usable amount of volume on my mic (sennheiser e945)at a gig I need to be up around 11 o'clock, with the treble taken way off, and the sound then is really wooley. I'm wondering whether to use a di box, or perhaps another preamp. I used the Compact last night,first without Tonematch, then without. I just couldnt get the volume or tone by going staight into channel 2.
It seem a real shame,as channel 1 'straight in' works great! And we soon learn to live without reverb. Ifeel that channel 2 is really spoiling what otherwise is great setup.


Channel 2 should (and does) sound great with a line level signal or Guitar with a pickup in it. It was not designed to run a low-impedance microphone like your Sennheiser e945 - nor was it meant to. That is what Channel 1 is for - vocal microphones.






*** Microphone into Channel 2 ***
not recommended.

I've tried it several different ways just to experiment with mic'ing some of my acoustic guitars. Straight in, there wasn't sufficient gain to reach the volume levels I need for performance.

I had some success when I ran through an impedance matching transformer, but ultimately I decided to stick with guitars with pickups.
Hi workshop05,

I'm not sure if this will help but let me try to give you some additional perspective based on past L1 history. As you know the L1 approach is unique and for many customers a speaker placed behind them and at ear height is a completely new experience. Often it takes some time to adjust to the new sensation of experiancing everything come from behind the musician (as opposed to separate backline, monitors and mains). Because users are closer to an L1 Compact over a conventional loudspeaker it possible that you may notice or be more sensitive to the noise floor. This is normal. And although you may hear the noise, it's unlikely your audience will even notice because of their distance to the loudspeaker. And the majority of what you experiance from the performance location is related to your proximity to the L1.

Again, this is just my perspective on the situation, I don't doubt what you are hearing. And ultimatly you are the judge whether the L1 Compact will work for you or not. My advice would be to try to live with it for a few gigs and ask the audience what they think of the performance and overall sound quality. Just a suggestion.

I hope this helps.

Regards,
Craig
I have no problems with the sound quality of the Compact. It is great! With the Tonematch it works just as well for me as my L1 Mk11,in just about all of my venues!
As much as I have tried to fiddle with channel 1, it is unusable as a mic input. I am still hoping I can use some sort of inline transformer or preamp to bring up the gain and turn down the noise on channel 1. Does anyone have any ideas about this? The apeall to me of the Compact is in it's simplicity ; Guitar-Channel 2, and mic-channel 1. That's all I want. Help please!!!!
quote:
Help please!!!!

It seems that you need to compare your Compact to another one, like at Guitar Center or somewhere, to confirm that it's not inherent in all the units.
Personally I have no problems in general, but did run into a very bad sounding venue just recently.
It was at a Baby Blue Eyes gig. We never could get it to sound *right*, still don't know why. We've used the Compact in that venue before, in a different position and it was fine.

Could have been the mic, we don't know.
Hi Seth411,

quote:
Originally posted by seth411:
Has anyone had the issue where the mic input makes constant crackling noise at certain locations and not at others? The noise coincides with the volume level.
Input two is always clean.


Do you hear the crackling noise if there is NO microphone cable attached? (With or without a microphone attached).

I am wondering if a defective cable or microphone is intermittently picking up interference in different environments.
I must remember not to write so late at night.
Sorry about the grammar.

I hear crackling noise out of the #1 input with or with out a cable and mic. The noise is audible even at very low levels.

I've heard this noise at my house as well so it is intermittent. The unit is only a few months old.
Hi Seth411,

Are you in North America?

If so, then all Call Bose® Product & Technical Support at (877) 335-2673 (U.S. and Canada only)
Monday-Friday: 8:30 AM - 9:00 PM ET
Saturday 9:00 AM - 5:00 PM ET
Currently no support available on Sunday

It is really tough to diagnose an intermittent problem by exchanging messages like this. I think it would be faster for you to call if you can.
I had this exact problem (crackling over the mic input) when i first bought my Compact. After talking with Bose tech support, I took it back to the store where I bought it and I exchanged it for a different one. There is none of this crackling noise in the replacement so I am happy.
Frustrating. I got the unit back from in the mail from warranty and it still makes the same noise. No documentation from Bose what they did either.
And on top of that, though I've only had the unit for 3 months I had to pay for shipping for the repair.
quote:
Originally posted by seth411:
Frustrating. I got the unit back from in the mail from warranty and it still makes the same noise. No documentation from Bose what they did either.
And on top of that, though I've only had the unit for 3 months I had to pay for shipping for the repair.


Hi Seth,
I can see why you would be frustrated; rest assured that we will continue to work with you until this is resolved. It would be helpful for me to obtain some more specifics from you so we can research our service records and see what was done to the unit. We will make this right.

I will be sending you a Private Message in a few moments.

Thank you,
Neil
I just discovered something that could help lessen this problem.

My mic input became extremely noisy after dissembling & reassembling during housecleaning. The noise was coming from channel 1 with no microphone attached - and channel 2 unaffected.

So I dissembled the extension pieces, blew any dust off every connector and reassembled with the extension pieces reverse order.

The noise subsided - now there is only the small hiss that we have all learnt to live with.

I wonder if cleaning the connectors with cleaning fluid will help further?
I don't like that hiss and I don't understand why it's there. Since I'm usually feeding a T1 into the Compact, it's not normally an issue. But on a couple of occasions I've gone directly into the mic input of the Compact and it's noticeable.

I'm fairly certain we musicians and singers are the only ones concerned about it but I still don't get why it exists.
Here is my update
I ended up sending the unit back for repair. a few weeks later I got the unit back and it was still wildly hissing. I work with a company that has four of these so I new that this one wasn't right. The tech support said that they found nothing wrong with the unit. I called our local Bose rep(luckily he was a friend because we bought so many units) that he paid to have it shipped the second time. Unit came back sounding just like the others with the low his (with a few scratches from repair).

My understanding is that they hiss because the main internal trim is set all the way up. Similar to if you had a mixers trim set maxed, then you controlled just the channel fader.

My wife uses ours to teach piano and likes it on the floor underneath the keyboard to tame the hiss, and I wouldn't say that she is always a very critical listener.

So I'm not under the illusions that I bought this for its design, size, weight, and looks, not necessarily for the quality.
I will say that as a solo musician and singer, I have been able to keep the hiss controlled enough so that when I have plugged straight in from the mic it hasn't been an issue.

I performed at a wedding ceremony on Saturday and you could have heard a pin drop in the hall before I hit the first chord. It came across fine.
quote:
So I'm not under the illusions that I bought this for its design, size, weight, and looks, not necessarily for the quality.


When I got my compact I plugged my Mic into the mic channel and heard that hiss your talking about once the volume was up a bit. I decided not to use it. I have a tonematch which works fine with the compact. Is it a question of quality that you mention? Time will tell if my Bose Compact and my Model2 will hold up over the years of pro use.

Aj
Music is neither new or old...it just "is"
We’ve designed the L1® Compact with the goal of providing a simple user interface for both musicians and general purpose users. You will notice there is volume control for each Channel but no overall Master volume. This means that the power amp section is always at full gain. In this configuration the Channel and Channel 2 volume controls are effectively acting as trim controls.

Hi

So......IF I am using a tonematch with my compact into channel2 , would it be better to keep channel "2" Volume at say 10 oclock and Tonematch Master Volume at 12 o'clock or should they both be the same starting out? Would a lower channel 2 volume setting and a hight Master Volume setting on Tonematch be better from a microphone feedback standpoint?
I believe the Compact MkII should include these features

  • trim & volume control for channel 1
  • phantom power switch
  • tonematch input
  • main power switch on top panel
  • cleaning fluid for connectors
  • tower relocated to back of unit so it doesnt block the view of the trim leds
  • new not static cover bag


Then it would be perfect Smile
Originally posted by AJ:
We’ve designed the L1® Compact with the goal of providing a simple user interface for both musicians and general purpose users. You will notice there is volume control for each Channel but no overall Master volume. This means that the power amp section is always at full gain. In this configuration the Channel and Channel 2 volume controls are effectively acting as trim controls.

quote:
Hi

So......IF I am using a tonematch with my compact into channel2 , would it be better to keep channel "2" Volume at say 10 oclock and Tonematch Master Volume at 12 o'clock or should they both be the same starting out? Would a lower channel 2 volume setting and a hight Master Volume setting on Tonematch be better from a microphone feedback standpoint?


Hi AJ,

In my personal experience I tend to use the following rules of thumb to achieve what I perceive as maximum gain before feedback:

T1 Vocal Channel Level: 1 o'clock
T1 Acoustic Guitar Channel Level: 11 o'clock
T1 Master Volume: 3 o'clock (75% or so)
L1 Compact Channel II Level: 11 o'clock or less depending on how loud I need to be

We have performed numerous critical listening demonstrations and these general settings have produced excellent results.

Neil
I forgot to add that I think the compact is great. I think its simplistic design is great for many people. I've helped a few people who knew nothing about sound get these up and running in minutes. With only one knob to control the volume you can't get a more straight forward approach.

Personally, I would love if it had 10 more features, but then it would cost more and probably confuse others who don't study sound. but that's just me. For the work I do the more options the better but then it would probably not be the best piece of equipment for those easily confused. Double point...

Anyways if they were to make a model 2 compact, I would like to order
-more line array design(for feed back and coverage but keep the same weight and size)
-a trim for the amp for quelling the white noise during home use or maybe just a simple low volume button?
-Another knob to rotate the speaker array amount.

I've also added a picture to show how valuable the aesthetic design aspect of this product is.
So my point is... of course it could be better but there isn't much else in the market like it and it is a great tool.
I have the same issue with "noise" on my Bose L1 Compact on Channel 1 (XLR). I have read all the forums and posts I could find. The replies, including those from Bose techies, present lots of info and "tips," but no actual solutions. Here are my observations.

At "startup," I hear the "white noise," rustling leaves," and "crackling" that everyone describes. After trying the pseudo solutions of buying new cables, cleaning the connectors, etc. I thought I would actually try to identify the issue. Cut to the chase: It is the bass module. Plug in the Compact with no speakers. Listen closely, at 12 o'clock (volume) you hear the "noise." Plug in the speaker array without the extenders. Set the volume to 9 PM and the noise is amplified enough to be annoying and to activate the green trim light. I have tested this while powered through a variety of outlets, surge protectors, and venues. Same problem. To confuse the issue, the noise sometimes goes away after it warms up, fooling you into thinking that realigning the extenders and changing out the cables has actually helped. Sorry, I have no solution, but hopefully Bose will address this very annoying issue with the L1 Compact itself and not blame settings, cables, mics, and mixers.
Hi Kurt,

I can't tell from your description if what you are describing is normal for the unit or not. But since you are concerned, let me suggest that you call L1® Support and see if someone there can address this in a more satisfying way for you.

Call Bose® Product & Technical Support at (877) 335-2673 (U.S. and Canada only)
Monday-Friday: 8:30 AM - 9:00 PM ET
Saturday 9:00 AM - 5:00 PM ET
Currently no support available on Sunday
I have also experienced this problem. In fact last night it nearly ruined my gig. Fortunately it subsided after about 20 minutes, worked fine for the next 2 hours, then returned to ruin the last 30 minutes. I changed cables and microphones during the problem to no avail. I have owned my L1 for several yeas and this was not a problem until the last few months. What gives?
Hi noneyet,

Thank you for joining the Forum.

Sorry that you are having trouble with your Compact. From your description, it seems that you have done some good troubleshooting.

Does this happen in multiple locations? If so then you can probably rule out a noisy power source or environment.


It sounds like it's time to call L1® Support. It's a free call and the people on the other end are very helpful.

Bose® Product & Technical Support at (877) 335-2673 (U.S. and Canada only)
Monday-Friday: 8:30 AM - 9:00 PM ET
Saturday 9:00 AM - 5:00 PM ET
Currently no support available on Sunday
The occurrence of the problem is independent of location. It has happened at another gig which is outdoors, at the gig I mentioned in my first post (where I have been playing for over a year) and in my house - so we can rule out environment as the cause. It is currently happening with every possible permutation of cables, mics and with or without the extenders. It functioned flawlessly for several years (I bought the compact as a secondary set-up while my big Bose went for repairs and it ended up taking the big one's place)
Hi noneyet,

It sounds like you have ruled out the environment. All that's left is to call L1® Support.

Call Bose® Product & Technical Support at (877) 335-2673 (U.S. and Canada only)
Monday-Friday: 8:30 AM - 9:00 PM ET
Saturday 9:00 AM - 5:00 PM ET
Currently no support available on Sunday

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