L1 Model II low frequency dropping in and out

I hate to say this but every single L1 Model 2 I've had has experienced the low frequency dropping in and out. I'm on my 6th power stand and this problem started up again last night. Bass frequencies fade out and the overall tone is weird. Then randomly the lows pop back in and the system sounds good again. It's not like the B1 is losing the connection because there is no complete drop out of signal. I have two B1s and a B2. Changing cables and Bass cabinets don't make a difference. The problem is with the L1 power stand. This power stand is a replacement for the last one that had the same problem and is not even a year old. Hopefully it is still under a warranty. I will call Bose tomorrow to get it sorted out. 

I've been using the L1 systems since the first version came out years ago. Even the original model (I had 2 of them) had sound cutting out issues as well. Eventually I got rid of those and got a pair of model 2s. The original power stands have been replaced twice already and now one of those latest replacements is exhibiting the same problem.  I am pretty much fed up now. Bose support is awesome and is what has kept me around this long but from my point of view the L1 Model 2 systems just doesn't hold up well with frequent gigging. I play an average of 5 nights a week and up to 8 gig a week during season here. Seems like the L1 systems are just not road worthy enough for simple solo gigs.

I hope I cant get it fixed. Unfortunately, once it is fixed I may have to jump ship and sell both of my systems and move on. 

Original Post

so you are saying the bass cuts out, but the signal keeps going?

If so, that is a new one for me.  I have experienced all kinds of dropouts from the L1, and no matter the cause, the signal always drops out for a second.

How long are your speakon cables?

The amount of signal to the sub is drastically reduced. I can still feel some vibration from on the sub so there is signal there but it's barely audible. On my Saturday gig as soon as I started to warm up I knew the sub was not working right. My guitar lacked bottom end and played a track through it to verify. About 30 mins into the gig the bottom end suddenly came back and the overall sound was much clearer and more dynamic. Throughout the night the cycle repeated several times at random. At no point does the sound actually drop out completely.

very odd.  so it goes from normal to hardly any bass?

One thing I have noticed is that when pushed near the systems limit, the DSP output absolutely limits the signal for protection causing the bass to sound much weaker compred to if I lower the volume.

I have been told it's b/c the B1 can't compete against the array properties and the throw, but it does it in a small room when standing right next to it, so I believe something is going on inside when one pushes the system hard.

Maybe you are noticing what I am noticing.  I DJ and play modern music and I really notice it once I crank it up.  So much bass at low to medium volumes, and thin at high volumes.

Do you have the preset set for "Low Volume Music" - as that increases frequencies at low volumes and flattens out when driven harder.

Maybe setting that to flat to start with might help the appearance of bottom end when wound up. Personally, the B1 has never appealed to me with audiences of 200 - 300.

I run two L1 M2 with a B2 each and never have to drive the output more than 50% with the B2's normally set in mid position and I'm just a vocalist.

I cannot imagine running a disco on a single B1 with any success in a room with more than 100 in it - if that.

This post was forked into a new topic here: Perception of bass changes as you raise the volume

The T1 Tonematch presets are not dynamic and do not change when raising the volume.  They are simply a boost or cut at certain frequencies.  It's doesn't matter what volume it is at.

They do not "flatten out."  What you might be hearing is what I mentioned above, and the limiter doing its job so the bass sounds a little thin at near max volume b/c it's limiting.

Ya, so the amp to the Bass Module sounds like it does not function probably since you are saying it is doing it at low volumes.

For fun, you ought to try and use a B2 sub to see if the issue is in the B1.

I will say the title is misleading as it's not cutting in and out. It' just that the bass is weaker at sometimes than others.

Hi Eric,

I'm sorry you are having trouble with bass frequencies fading out (and coming back). This is not normal of course.

It sounds like you've done some great troubleshooting eliminating the cables, bass modules, and the T1.  Have you checked everything in the signal chain in front of the L1? (Instruments, preamps, anything else between the instrument and the T1 or mixer)?

If this is the L1 Model II unit you had replaced within the last year, it should covered under warranty from Bose. Please call Bose Support. They will help you.

Bose® Product & Technical Support at (877) 335-2673
(U.S. and Canada only)
Monday-Friday: 9:00 AM - 9:00 PM ET
 

ST

We've often had problems with a Bose L1 1S at our regular gig when the mains voltage is flaky and drops below a nominal amount...

And many other folks have reported the same problem.

It happened again yesterday -- our day started with muffled sound when playing pre-show music (attenuated highs and lower volume) that suddenly turned into the normal volume level and frequency response once it "warmed up"...I had to reach over and grab the main fader to bring the level down when it kicked on!

Frankly, I wouldn't own one without having a voltage/wattmeter on hand...

jaswrx posted:

The T1 Tonematch presets are not dynamic and do not change when raising the volume.  They are simply a boost or cut at certain frequencies.  It's doesn't matter what volume it is at.

They do not "flatten out."  What you might be hearing is what I mentioned above, and the limiter doing its job so the bass sounds a little thin at near max volume b/c it's limiting.

Thanks for the update, learning....

My comment was based on how I perceived the performance - what I experienced in using the preset - which is exactly how it seemed to work but now knowing truly how it works helps thank you.

Hi ScubaBadger,

You're right!

ScubaBadger posted:
✄ - ✂ - ✄ - ✂ - ✄ - ✂ - ✄ - ✂ - ✄

My comment was based on how I perceived the performance - what I experienced in using the preset - which is exactly how it seemed to work but now knowing truly how it works helps thank you.

Please see Perception of bass changes as you raise the volume

ST

This power issue is very interesting. I've had the exact same problem described by @Chet. Playing (acoustic guitar and one or two vocals) and all of a sudden the volume and tone increases dramatically (whoa quickly reach for master volume to avoid blasting everyone away). I have eliminated the problem by not using the ToneMatch T1 and using a traditional mixer straight into the L1 model II. Sometimes I use a B1 and sometimes I use the B2. Either way I don't get the problem when using a mixer. Is the ToneMatch T1 what is sensitive the voltage of a venue?

Hi ROBC14,

Great troubleshooting. Since you've narrowed the problem down to the T1, please call Bose Support.

Bose® Product & Technical Support at (877) 335-2673
(U.S. and Canada only)
Monday-Friday: 9:00 AM - 9:00 PM ET

ST

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
×
×
×
×