monitors on spikes and y-splits
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From: bob urz on 25 Mar 2010 13:54 stagehand wrote: > Hello. I write on behalf of a small group of volunteers at an art > centre, Our chief tech is evasive on some issues so i thought we > would try here. If the questions are too 'not for us' i see from > other posts you will not hesitate to let us know.....we would not have > it any other way! > > 1: Why not sit stage monitors on spikes or similar to isolate them > from the stage. We do use a pre-set that rolls of the bass when > appropriate. > Don't know about spikes, but i have frequently seen and used sound bricks( a piece of 2x4 or such covered with black gaff) to adjust the angle of the dangle. I have even seen direct boxes used for this. Other odd named devices: Audio grenade (NL8 barrel) audio M80 (NL4 barrel) bob
From: Joe Kotroczo on 25 Mar 2010 15:03 On 25/03/2010 14:02, in article e5f66ed3-0f7d-4ad7-a178-aeb3d3e0a204(a)g11g2000yqe.googlegroups.com, "stagehand" <oldtime100(a)o2.co.uk> wrote: > Hello. I write on behalf of a small group of volunteers at an art > centre, Our chief tech is evasive on some issues so i thought we > would try here. If the questions are too 'not for us' i see from > other posts you will not hesitate to let us know.....we would not have > it any other way! > > 1: Why not sit stage monitors on spikes or similar to isolate them > from the stage. We do use a pre-set that rolls of the bass when > appropriate. Why would you want or need to isolate monitor wedges from the stage? Why would you want or need to roll of bass? And why and how are you using "presets" for that purpose? Seems to me that something odd is going on here. Personally, I do want my stage monitors to couple with the floor, because I usually can use the little extra that gives me. If I have have too much of anything, I can correct that easily with the 31band I have on every monitor channel. Plus, spikes would prevent me from sliding the wedges across the floor, making any correction of their position a pain. Not the mention the potential for injury with sharp pointy stuff on stage. So overall I would tend to say that spikes are a silly idea. But: I'm intrigued about this "preset" business, and wonder how exactly you used these and what piece of equipment they originate on. > 2: What things can xlr y-spilts be safely used for? Line and mic level signals would be my first answer. But you use the word "safe" here, what are you trying to get at? Rule of thumb: if you're unsure if the thing you're about to do might damage something, don't do it. I'd be a lot easier to answer you if you explained to us what you are trying to do. We could then just explain to you why that is a harebrained idea. -- Joe Kotroczo kotroczo(a)mac.com
From: Phil Allison on 25 Mar 2010 20:47 "GregS" > > Spikes, yikes !!! ** Sounds stupid and very unsafe on stage to have any sharp bits on a speaker box. Folk are bound to get injured. > Spikes are mainly for stabilizing giving good coupling to the floor. > Some poorly constructed boxes can walk across the floor. > Rubber is another good thing to use. ** Large rubber feet fixed in each corner should do the trick . > Good boxes do vibrate that much. ** The corners of any such box do not vibrate. Think about it.... > If you decoupled the box, the main coupling to the floor is sound waves. ** Floors and stages DO vibrate in sympathy with low frequency energy in the air - so speaker boxes with hard ( ie metal ) corners can easily travel across smooth floors under such high vibration. ..... Phil
From: stagehand on 26 Mar 2010 06:18 On Mar 26, 12:47 am, "Phil Allison" <phi...(a)tpg.com.au> wrote: > "GregS" > > > > > Spikes, yikes !!! > > ** Sounds stupid and very unsafe on stage to have any sharp bits on a > speaker box. > > Folk are bound to get injured. > > > Spikes are mainly for stabilizing giving good coupling to the floor. > > Some poorly constructed boxes can walk across the floor. > > Rubber is another good thing to use. > > ** Large rubber feet fixed in each corner should do the trick . > > > Good boxes do vibrate that much. > > ** The corners of any such box do not vibrate. > > Think about it.... > > > If you decoupled the box, the main coupling to the floor is sound waves.. > > ** Floors and stages DO vibrate in sympathy with low frequency energy in the > air - so speaker boxes with hard ( ie metal ) corners can easily travel > across smooth floors under such high vibration. > > .... Phil The question was designed for enlightened responses, so thank you all for that. We assumed the isolation/reduction of unwanted vibration, resonance etc on the stage, would help towards a cleaner sound on stage. Spikes, as sharp things, of course are not the thing, but i wanted to see responses to the sound coupling notions explored (and to understand why hi-fi uses spikes etc anyhow!!) Also for those vibrations running up mic stands for example. We wanted to get monitor sound focused. Ours are long throw wedges so we anyway have to sometimes prop them up on our shallow stage (the boxes double as FOH or wedges). We use XTA DP226 controllers (& Lab Gruppen amps), with a number of manufacturers pre-sets. The monitor x-over pre-set is 2 way with a significant Bass roll off. (for our drum wedge we use a top box + 15"sub similar to our smaller FOH set up....(here we want the oomph factor). We also have BSS graphics on all sends (stage/FOH) in conjunction with the desk parametric (x2 yamaha o1v's). this has been helpful, and we are grateful. cheers
From: George's Pro Sound Co. on 26 Mar 2010 08:43
"stagehand" <oldtime100(a)o2.co.uk> wrote in message news:f2a049f4-c5f5-4538-b46c-9f569f3f8c95(a)q21g2000yqm.googlegroups.com... On Mar 26, 12:47 am, "Phil Allison" <phi...(a)tpg.com.au> wrote: > "GregS" > > > > > Spikes, yikes !!! > > ** Sounds stupid and very unsafe on stage to have any sharp bits on a > speaker box. > > Folk are bound to get injured. > > > Spikes are mainly for stabilizing giving good coupling to the floor. > > Some poorly constructed boxes can walk across the floor. > > Rubber is another good thing to use. > > ** Large rubber feet fixed in each corner should do the trick . > > > Good boxes do vibrate that much. > > ** The corners of any such box do not vibrate. > > Think about it.... > > > If you decoupled the box, the main coupling to the floor is sound waves. > > ** Floors and stages DO vibrate in sympathy with low frequency energy in > the > air - so speaker boxes with hard ( ie metal ) corners can easily travel > across smooth floors under such high vibration. > > .... Phil The question was designed for enlightened responses, so thank you all for that. We assumed the isolation/reduction of unwanted vibration, resonance etc on the stage, would help towards a cleaner sound on stage. Spikes, as sharp things, of course are not the thing, but i wanted to see responses to the sound coupling notions explored (and to understand why hi-fi uses spikes etc anyhow!!) Also for those vibrations running up mic stands for example. I fill some mic stands with lead shot or fishing sinkers, it works two ways, it dampens the vibrations and makes the stands more stable George |