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.