PEQ adjustments for cabinet arrays
Dra
Posts: 3,777
I'm looking for tips and techniques when arrying cabinets. I just added a pair of top cabinets. I sold my Peavey Impulse 200's and bought a 2nd pair of Yorkville E12's (used passive). These cabs have an 80H x 50V horn that can be rotated to be 50H x 80V. The \"trap.\" included angle is of the cab is 16 - 20 degrees, as near as I can tell. A butted side wall array looks really nice, but that leaves a very large over-lap even at 50 degrees. A straight ahead approach yields an almost dead over lap (good for volume, but nothing gained in widening the field).
I do not want to get into a situation of switching back and forth, but I would consider having a pair of each if that would be an advantage. Most (80%) set-ups are for DJ'ing with cabs set up 10 - 20 feet apart. Live sound gig's are usually conventions and school or church related functions with stacks up to 80 feet apart. The rooms are sometimes 2 or 3:1 long or 2 or 3:1 wide. Speakers are typically on stands and usually with the horn 2 feet or so above ear level when standing.
1. Are there any rules of thumb that apply here? Which angle combo is best for a given situation?
2. In the case where the cabs are all firing ahead, should the horn frequencies be attenuated with a hi-shelf filter? If so, again, is there a good rule. I will auto EQ outside, but what should I expect?
3. Any answers to questios that I didn't ask, but are helpful are also appreciated.
Thanks,
Dra
PS - Sounds like a good time for an \"Arraying 101\".
I do not want to get into a situation of switching back and forth, but I would consider having a pair of each if that would be an advantage. Most (80%) set-ups are for DJ'ing with cabs set up 10 - 20 feet apart. Live sound gig's are usually conventions and school or church related functions with stacks up to 80 feet apart. The rooms are sometimes 2 or 3:1 long or 2 or 3:1 wide. Speakers are typically on stands and usually with the horn 2 feet or so above ear level when standing.
1. Are there any rules of thumb that apply here? Which angle combo is best for a given situation?
2. In the case where the cabs are all firing ahead, should the horn frequencies be attenuated with a hi-shelf filter? If so, again, is there a good rule. I will auto EQ outside, but what should I expect?
3. Any answers to questios that I didn't ask, but are helpful are also appreciated.
Thanks,
Dra
PS - Sounds like a good time for an \"Arraying 101\".
0
Comments
Please expound.
Dra
I'm way behind on this post. Could you post a picture for my smallish visually oriented processor?
W
1. 65D = 65 degrees of diagonal dispersement...
2. ddbs = diagonal decibels...
It was suppossed to be funny...
Kevin you gotta set up the punch line.
Wolfie, if you think you're behind, check out Kevin's idea.
To get the flying V like Kevin suggests, I'll just lean the cabs together like a Tee-Pee and shoot a drywall screw in to hold them secure. For venues that only require 1 cab per side I'll use a 2x4 painted black as to not attract attention. Then all I have to do is make sure that the chairs are placed in diagonal lines.
Dra
Not a lot of time tonight but here's a quickie...
The 80 Horizontal would be usable in single cabs per side.
Flip them to 50 horizontal for arrays with 100 degree coverage per side. Cabs right together...
shoot I have to go.. I'll get back as soon as I can..
G
Dra
Separately, I need to fly a JBL JRX118S.
Got any ideas on keeping this thing from falling on my head.
Hmmm... that last part of the phrase sounds familiar. Something Dra said about headroom, me thinks.
Cheers!
W
If you go with the perforated U channel use the same fender washer techique.
Dra
Disclaimer: I Kevin Pippen makes no representations or warranties regarding the afore mentioned mounting procedure or its suitability for use. By using the afore mentioned mounting procedure in full or in part the installer assumes liabilities and risks associated with the use or misuse of this procedure, including any harm or damage to equipment and/or facilitiy or persons that have access to it. I Kevin Pippen shall not in any event be liable for any direct, indirect, punitive, special, incidental, or consequential damages, including, without limitation, lost revenues, lost profits, or lost headroom arising out of or in any way connected with the use or misuse of the afore mentioned mounting procedure.
Input?
Dra
PS - It appears as though if I put the wedge bottom of one cab flush to the trap side of the other cab is is incredibly close to a perfect array with the 50 deg rotation. There will be a\"cavity\" but no through gap. Apparently Yorville thought that out.
I was going to insert a pic / drawing, how do I do that?
[/img]
Kevin
This is what I was describing in my last post. Is this ideal or too much in?
If this works I may just rotate all of the 50 degrees and leave them.
Dra[/img]
Ok if you were going to (not germain to this post but if you were wondering) for 4 per side horns @ 80 horizontal, all 4 horns together, so there would be woofers below, and above the horns, all cabs tight together. For another row above or below woofers together.. horns above... so it would be woofer-horn-horn-woofer-woofer-horn...vertically, with rows on either side the same configuration. When having left right stacks its more important to keep the information on the audience and off the reflective surfaces than it is to be concerned with coverage overlaps... if you can accomplish both .. great. It's often impractical to have front fills so the hanging L/R's need to cover the front centers also.. but a center isle offers some ability to manage comb filtering. In multiple speaker array's there is a procedure called power shading where the speakers that are closer to the audience are set to lower volumes and these that have to project to the farther regions are long-throw and run louder...You can steer groups of subs with delays also (they have to be together though). Information on these and other techniques are searchable in a \"google search\" using keywords.. including programs like EV's \"Array show \" which is a freeware program. There are also programs that offer coverage prediction and even speaker types/mfg's models that would best suit the application.
As Kevin said, through bolts are necessary, but the corners also usually have internal metal angle bracing at least on the sides. two hangers and a swing bolt should suffice. 'T' nuts on the bottom should suffice with a pinch bolt that would also hold the metal angle in the corners.
anything else?
Gadget
Your horn dispersion is almost identical to the four flying JRX115s I installed... They are exactly the same distance between and toed-in at almost the same angle... What I did is working-out very well...
Looks great to me; but you have to consider......
Kevin
I really like the picture. My head has stopped spinning for now.
: )
You got it! good use of the techniques and information... more important to keep the sound off the walls and on the people.
G