Seems the only people who think there is a "phase cancellation" problem are people who do not own a Bose system. I have had mine for three years and used it with several different arrangers and no such problem exists.
I have also tried the new model 2 system extensively. It disperses the sound even better, if possible, and is a little lighter.
It comes with an optional mixer, but it isn't really optional, you will have to have it.
It is quite good (the mixer) but is an extra $500. I use an external mixer, usually Behringer, with my Model 1, when I need it, and I very happy with it. I cannot see the new system being worth $1000 to upgrade, but if I didn't have the Model 1, I would certainly get the Model 2.
Two years ago, when we had the arranger jam in Shreveport, there were multiple keyboards and mics, all being fed to the L1 through a 12-channel mixer. The Bose handled it all without a hiccup.
Quite a few SZ members were there, and can attest to it.
There was a PSR2000, a Ketron SD1, a Korg, a Midjay, an accoustic guitar, a fiddle and a harmonic going through it. No cancellation.
On two occasions, I set up the Bose system side by side with two powered Barbetta speakers. Both HankB and Bill (semilive music) heard the test. We all agree that the Bose blew the stereo system away. There is no hint of losing anything sound wise, in fact the opposite was true: the Bose reproduced the sounds clearer and more distinctly, the Tyros 2 piano included.
I have played jobs from 5 people to 500 people using the Bose system and it handles all of them equally well.
Just tonight I played a Roland E50 through it and it even made that piece of junk sound good. (I'm JOKING, it's actually a heck of good keyboard.)
If you are an EXTREMELY loud situation, you won't want to get directly in front of the tower, but you can sit in front and slightly to the side.
The sound falls off just a little in the first few feet, but not much. Then it seems to carry over vast distances without losing volume. As a rule, if it's too loud for you, then it's probably too loud for the room.
I can speak in a normal voice and be heard distinctly by everyone in the room (and sometimes in other rooms!), yet it isn't too loud for the table five feet in front of me.
It's truly amazing.
You don't have to take my word or anyone else's; Bose will let you try one with a 45-day return option, no questions asked.
My livelihood depends on my sound, and I know in my mind that the Bose has allowed me to stay ahead of most everyone else in this area in that regard. It has paid for itself many times over. As a matter of fact, I was able to pay for it easily with equipment that I no longer needed after I bought it.
Because I play in a high-visibility venue, several other pros have purchased the Bose system after hearing it there. A lot of others want one but think it's too much money. But then again, I'm working and they are not. Cause or effect?
DonM
P.S. You can see lots of comments, good and bad, by current users here:
http://bose.infopop.cc/groupee/forums/a/frm/f/778102955 [This message has been edited by DonM (edited 01-08-2008).]