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 1 
 on: Today at 12:08:28 am 
Started by Jerome Malsack - Last post by Rob Spence
No good.  My interpretation of the description is that all output grounds are tied to input 1 ground.  In a PMD all grounds are tied together.  In this case the ground conductor on input one would need to be rated for 100A, not the 20A rated 12ga wife that it's going to be connected to.  The device would also need to be rated to 100a which it's not.

Ok.


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 2 
 on: Yesterday at 11:51:35 pm 
Started by Ivan Beaver - Last post by Jeff Bankston
If you draw a line through each and every person who ever played rock guitar, they'll all intersect at Chuck Berry.
You got that right !


http://www.youtube.com/watch?v=l886uQi6Rhg

 3 
 on: Yesterday at 11:34:39 pm 
Started by Roger Talkov - Last post by Tim McCulloch
They already have the speaker.  Its currently mounted on the backstop.  They just want to move it out to the field aimed in so that the neighbors don't bitch as much.  Long story.......

Turning down the PGM is not an option?

File in your "unexpected" folder":  a local baseball stadium (aging AAA league facility) installed new short vertical array to cover the grandstands from the far side, maybe a 300 ft 'throw'.  At the time I lived 4 blocks from the stadium and could clearly hear, at annoying level, all of the music and announcements from my back porch.  Particularly noticed when it was very hot and humid from mid afternoon into evening, and those were the clues that the system designer had not compensated for the effect to propagation resulting from heat rising from the playing field and asphalt parking lots.  When I visited the stadium my eyeball estimator also thought the array should have been aimed down another -10 or maybe more, to maximize coverage to all seats and not just the top rows.  There's more to the story but when I talked with the designer he insisted the array was correctly aimed and ignored the convection connection.  I had moved by then and don't know if anything was done to correct it.

edit ps:  The take-away here is that for the most part the team wasn't complaining about SPL in the park because they could turn it up and nothing broke - but a big chunk of the radiated audio was shooting right over the West Grandstand and aimed in my general direction.  Better aiming of the array would have put more PA in more seats with less energy expended outside the stadium.

 4 
 on: Yesterday at 10:48:40 pm 
Started by Jerome Malsack - Last post by Erik Jerde
Saw this on Ebay,  any expert review and comment welcome. 
http://www.ebay.com/itm/Hubbell-Star-Grounding-Five-20A-Input-to-Five-20A-Output-Power-Distro-/282230566364?hash=item41b640addc:g:otQAAOSwA3dYDY5c

No good.  My interpretation of the description is that all output grounds are tied to input 1 ground.  In a PMD all grounds are tied together.  In this case the ground conductor on input one would need to be rated for 100A, not the 20A rated 12ga wife that it's going to be connected to.  The device would also need to be rated to 100a which it's not.

 5 
 on: Yesterday at 10:37:15 pm 
Started by Jerome Malsack - Last post by Mike Sokol
The problem with this kind of gadget is that if the single ground fails, then all chassis in the sound system are tied together and a line-to-chassis fault on one circuit will result in a reflected voltage on everything else plugged into it. I'm not so worried about the EGC bus being too small since it's unlikely you'll have multiple line-to-chassis faults at the same time. But this is all grounding eggs in one basket, so that better be a perfect single ground or there will be serious trouble.

 6 
 on: Yesterday at 10:17:54 pm 
Started by Stuart Murphy - Last post by Stuart Murphy
Oh absolutely.  I think moving heads are the wrong tool for this job.  In addition to the 3x3 grid, you might want to consider something like the Chauvet EPIX or the Blizzard Pixellicious.  They're a little different than the COB grids but you get more of a true pixel mapping display with these.  They're also very reasonably priced in my opinion and are sold in a few different variants.

Thanks Jeff. They do both look good. I need to get my head around how to work that dot pixel look into this somewhat glamorous Shania thing, design/looks-wise. They seem to be very useful/clever fixtures!

 7 
 on: Yesterday at 09:57:40 pm 
Started by Jerome Malsack - Last post by Rob Spence
How is this any different than the "poor mans distro" ?


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 8 
 on: Yesterday at 09:33:00 pm 
Started by Jay Marr - Last post by Jay Marr
Yes, you are. The major cause of distortion is running any part of the signal chain beyond its capability to pass clean audio. In digital consoles that would be right below 0dBfs. That overload point could be at the input, in the eq, in any group or aux bus, in the master bus, in the matrix bus. That is why it is good to check your level at all those points periodically by PFL'ing the channels at those points. Moving the fader above "0" does not create distortion, driving the signal above whatever the maximum signal level your console can deliver does.


Can you help me understand the best method for determining the limit of the console.
Do you rely on the console meters at each point in the chain.

Channel isn't redline - I'm ok
Then
Sub group isn't redline - I'm ok
Then
Matrix bus isn't redline - I'm ok
Finally
Master output isn't redline - I'm ok in total?

Thanks for all the insight.

 9 
 on: Yesterday at 09:32:24 pm 
Started by Justin Waters - Last post by Justin Waters
Anyone know if there is room to change the IEC connector on a RCF 4PRO 2031A speaker to a powercon and add power out?  Warranty is almost up if that matters at all.  Getting irritated by the IEC.  Having Powercon in/out would be very helpful in my situation.

 10 
 on: Yesterday at 09:04:14 pm 
Started by John Roberts {JR} - Last post by Hyam Sosnow
Photography is about capturing light, not how big your dick is.
Chris.

Don't kid yourself. In Western culture today everything is about how big your dick is.

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