In some of the posts you talk about midi back-up tracks being sent [50/50] to two PAS towers. Yet, when we mix the individual instruments you suggest full pan to each tower, respectively. Why is the midi split 50/50? And if we do this do we lose the pan settings of the midi tracks?

RobReis,
Can you rephrase the question? I just want to make sure that I understand your questions.

Thanks.

RobReis,

I believe the issue here is that most midi or recorded backup tracks are in a stereo configuration already - so you are sending the left output to one PAS - the right output to the other - just as you might in a traditional system.

Individual instruments (horns, guitars, vocals) are by their nature mono - not stereo. To attempt to create a stereo image with these instruments, you lose much of the marvel provided by the Bose PAS, and your results will simply not be as good (in my personal experience).

Ken

I avoid sending any mono sound (i.e. horn panned to the center of a sound module) to more than one L1. If the same sound is emanating from 2 of our systems, those 2 waves will interfere with each other, causing uneven sound throughout the listening area - hot spots and dead spots. As Ken (jazzhorn1) so eloquently stated, "You lose much of the marvel provided by the Bose."

hi chuck. as you know i am going to be experimenting with 2 systems for me a solo performer. it is one of the things i am going to try to see if i can hear the hot spots etc that bose explains about running the same signal through 2 systems.
I am basically going to be keeping the two systems right next to each other right behind me.
basically when i have been on the gigs with one, when i really had to crank, albeit dropping alot of eq to reach the levels without feedback ( so the systems power actually wasnt maxed). I just felt i wanted a little more headroom and fullness. the small rooms were the toughest that had a sufficient crowd noise ( chatter etc) and not much space to get much more than 3ft in front of the bose.
my theory was to be able to run the guitar with the same settings into 2 systems and be able to run each a litle less hard, and though as hilmar told me, id really only be gaining about 3db powerwise using the 2 systems. I was thinkin the 3db may be all it would take.
i wont know till i take my wireless and walk around a room, but im guessing the farther apart the speakers would be , the more prounounced the hot and dead spots would be. Is this a correct assumption?
apprx how far out do you think in an audience this phenomena would start to occur.?
as i said my plan as a solo performer would be to kep them both directly behind me and as close together as the ps1 base's allow.
i figure you guys know the most on this stuff as you have probably experimented alot. if nothing else im using it as an ear exercise and for me to actuially hear what you at bose have already heard. but even if i decide that the 2 systems will not solve the dilema, perhaps i'll have yet a better understanding of how the system works. I hope i'm not being a pain, just want to really get the most from the system. or systems if i decide to keep.

wfs,
You're not being a pain in the least - We genuinely enjoy this stuff and are always glad to help...
There are too many variables to give you one 'right' answer to your question:

quote:

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apprx how far out do you think in an audience this phenomena would start to occur.?

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The hot/dead spots will be a function of the frequencies' wavelengths, which will change as you play different notes and chords. Any reflections off of side walls in the listening area may also be a factor and would thus change from venue to venue...
I recommend addressing/minimizing the feedback at the source. Is it just your guitar that's feeding back? Are you micing the guitar? Using a pickup? What kind?
Bear in mind that adding another system with the hope of augmenting a feedback-prone source might actually compound the feedback...
I hope this helps and I'd love to hear the results from your 'walk around'. Please keep me posted...

will do. basically on the hot dead issue. was not referring to feedback, but to just the room etc and where the hot and dead spots will occur. and as you answered, many variables.
feedback issues are minimal i think, until i ned to get a bit on the loud side, and cant be much more than 3ft in front of system.
guitar is a pickup, and at moderate volumes no problems and great tone. and even when hitting higher volume levels, its not like a huge howl, more of an annoying frequency that is on the verge, and just booms. if i pull the eq out to solve it, ive lost the tone all together. i think this is just as hilmar and i discussed , the problem of small rooms loud volumes. and difficult rooms as far as reflections etc.
my theory ( knowing 2 systems would also create another source of feedback possibility) was by running 2 systems close together, i could use less volume from each, and come close ( if not the itty 3db more) to getting the same volume in a room as one system running alot hotter with more volume.
i did order an om5 which i believe is a good investmnet, and will give me max protection from feedback on vocals. but my voice is prety strong, and working it close, not much of problem.
i hope to set up in a basic room similar to a bar but more like just a big rectangle ( may as well experiment with the worst :-) )...but a good size room to see how things act and reflect on wed....and will have hopefully wed - sun to try different things. I'll let ya know.
sometimes, i guess rolling off low frequencies is essentially like lowering the volume of the bass. but sometimes it seems to me if i could leave the frequencies in that are booming, and just lower the volume of the whole subwoofer a tad, that would be the answer as far as the boominess, but still retain the tone better.
i think it is somewhat of an eq issue though, as when i run through an effects and use the para eq and then just run the guitar through that and into ch 3 or 4, i get alot more before the bomminess starts. i think i said before it may be because when i use ch 1 or 2 i set the trims at max before hitting red. as always thanks for your input...i'll report as my experimenting goes...

I use one system...sequence everything with pan dead center.....but I still like to come out of the Yamaha 9000 into both EQed channels on the Bose.....it seems to have a better sound than coming out of the L/R output into 1 channel.
Cliff
RVsongs4you.com