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 11 
 on: Yesterday at 11:25:00 pm 
Started by Sam Costa - Last post by Don T. Williams
Belden 8451 or equal.  Most will have a foil shield with a drain wire around a twisted pair.

 12 
 on: Yesterday at 11:19:41 pm 
Started by Michael McCoy - Last post by Don T. Williams
Need some new guy help,

I am a network engineer that was asked to help out fixing a few issues with sound at my local church. I know enough to have resolved all their issues but one.

So on the kick drum, bass guitar and two electric guitars, we have some noise on the channels. Itís not a ground loop and I canít find what is bleeding into the channels. Killed all power in the area and still have the noise.

Itís also shown on the rta snapshot attached. The noise is across the entire band from 20 hz to 20k.

We need a lot more information.  What model is the mixer?  Is there an analog or digital snake?  Are all of these input signals from microphones, and if so which mics?  Are some of these DI boxes?  Is the phantom power (48V) on for these channels?  Noisy guitar (and even bass) amps are common, but if the same noise is in the kick drum channel that is odd.  If you unplug the inputs from the mixer is the noise still there?  How about when the "mic" end is unplugged?  More info please.

 13 
 on: Yesterday at 11:05:37 pm 
Started by Brandon Montagne - Last post by Ray Aberle
I suppose with 14-16' pipe, a longer trailer becomes necessary, unless they come as shorter lengths that connect together via threaded connections?
Pipe and Drape uses either fixed uprights (usually no more than 8' high) and then adjustables. Like this---- the ones on the left are the original P&D, which you will still find more often in the wild. The ones on the right (that they call "castle top") is the new P&D v2.0.

The uprights range from 7-12' to 8-14' 9-16' and even 9-23' high. So, what you actually carry in is only 8-9 feet high, but it'll expand to as high as you need it.

-Ray

 14 
 on: Yesterday at 10:43:30 pm 
Started by Michael McCoy - Last post by Michael McCoy
Need some new guy help,

I am a network engineer that was asked to help out fixing a few issues with sound at my local church. I know enough to have resolved all their issues but one.

So on the kick drum, bass guitar and two electric guitars, we have some noise on the channels. Itís not a ground loop and I canít find what is bleeding into the channels. Killed all power in the area and still have the noise.

Itís also shown on the rta snapshot attached. The noise is across the entire band from 20 hz to 20k.



 15 
 on: Yesterday at 10:21:52 pm 
Started by andy foster - Last post by Scott Bolt
Hey Luke,

To my ears, the DSR112 is significantly better sounding, and gets louder than a PRX.

I have long wondered how good the RCF 745's are though .... so much so that I have even considered cruising down to Ohio to compare with Sean's speakers (I live in lower Michigan), so I am super interested in hearing the outcome.

I am looking forward to hearing the outcome.

FWIW, I have found the DSR112's to be quite resilient to my own stupidity (as well as others).  I once ran one (in a pretty large venue) at full limit for an entire set on accident (the gain got bumped on one when it was put up on the stand and it was on the other side of the venue from where my mix position was).  Not only was the speaker not damaged, it sounded quite good even in hard limit.  Pretty impressive.

IMHO, a properly processed powered speaker should be darned near impossible to hurt by running them into limit.

 16 
 on: Yesterday at 10:13:18 pm 
Started by Bob Leonard - Last post by Justice C. Bigler
Truly the end of an era. God rest her soul.

 17 
 on: Yesterday at 10:02:20 pm 
Started by Richard Penrose - Last post by Scott Bolt
HA, our online ordering system shows 2) DZR12 shipped as of tonight. That usually means a next day delivery. Might I be the first person on PSW to have hands on one? Stay tuned.

[ENVY]You bastard[/ENVY]

I am really looking forward to hearing your thoughts on the speakers.... especially since you also have the DSR112's to compare them against.

Keep us posted!

 18 
 on: Yesterday at 09:55:43 pm 
Started by andy foster - Last post by Luke Geis
Based on this new information, the weak link is not the speakers. The HF driver in the PRX 12" is the same as the one in the 15".

The DSR will not be a significant step up in performance either. The PRX model line is no slouch, but certainly not going to knock the socks off of anyone either. The DSR model line isn't any louder and not any more performance oriented other than a better crossover design. Which one will sound better is probably not really for debate. The DSR sounds great, but the PRX sounds pretty good too. The only major difference between them is that the DSR uses a 2" compression driver whereas the PRX uses a 1.5" CD. The 2" CD in the DSR should be more up to the task, but that isn't saying much seeing as how the peak performance of both speakers is the same and they have the same wattage amplifier.

I have blown all of 3 speaker drivers in my day. One was on purpose and the other two were simply me doing what the client asked for; more more more on a show that ran for 16 hours straight......... There are really only two reasons a speaker pops these days. Either you ask for more than it can do right then and there, or you ask it to work too hard for too long. Time is probably the biggest killer of speakers. These days speakers get so loud that volume isn't really as much an issue anymore, but when we ask a speaker to make a lot sound for a really long time, that is another story.

Modern powered speakers have only a peak SPL rating. So all we know is how loud it can potentially get. When we push the speaker until we see the little yellow limit light start to blink, that is telling us that the limits of the speaker have been reached. It won't get any louder, it will just run hotter and hotter until pop goes the driver. We can only expect to extract perhaps 9/10ths of what the speaker says it will do and for long-running shows that are perhaps longer than 4-5 hours, we should shoot to utilize even less of that potential volume in order to not overheat the drivers. You cannot run a speaker at full output for very long or it simply overheats.

The compression driver of speakers is generally the easiest to pop. It is smaller and less efficient at getting rid of heat. The element doesn't move very much and the heat sinking can only do so much for an object that is not subjected to much in the way of cooling. The CD is always at the top of the box and heat rises. This is why larger CD's do better with heat. They have that much more surface area to dissipate the heat and due to their size can generally handle more wattage.

It sounds as if you have burned through three speakers in pretty short order and are blaming the speaker for its shortcomings? The speaker will only do what you tell it to do. If you tell it to do too much, or too much for too long, it will let you know by simply burning out. You really do need to asses WHY the speakers popped. Another speaker of the same specs is typically not the answer. The DSR's may very well be your answer, but what will you do if you pop that driver too? There is forensics that can tell what made a speaker pop. If you don't think there is a fault detection and logging function inside the amp, you would be wrong. The warranty shop will pull the log and know right away if the speaker was abused, or not. In my experience, DJ's and inexperienced operators who cater to DJ's, are often the ones that see incidents like this; where they burn up several speakers before they learn what the issue truly is. Eventually, they do one of two things. They get a speaker that they can't possibly blow, or they learn how to operate the ones they do have within its limitations.

House music is pretty demanding on a PA system. The constant boom hiss of the kick and hi-hat coupled with lots of synthesizer sounds really work the PA hard. Keep in mind many synth sounds have a really low crest factor, so they work a PA hard when you run them at high levels. I think you were simply asking the PA to produce too much volume, for too long. This coupled with high demand music shortened the life of the drivers. You either have to turn down the PA or get speakers that are much more capable of the demand. I think the DSR's are going to fall victim to the same result. It may take longer, but it will likely still happen. 

 19 
 on: Yesterday at 09:43:03 pm 
Started by Brian Larson - Last post by Steve Crump
I have a client that has asked for sound reinforcement for the ceremony of an outdoor wedding under a floral arch. They have requested no visible microphones (even e6 headsets were nixed) so we were thinking of attempting to hide one or more microphones inside the floral arch itself to pick up the officiant and vows.

Has anyone tried this before with success? I imagine the couple will stand just in front of the arch. What pickup pattern would work best in this application? Omni, hypercardiod, shotgun or maybe even a boundary mic? Any specific product recommendations also accepted.

Any suggestions would be great!

I was asked to do the same last October at an outdoor wedding. I ty-wrapped a Advanced Audio CM87 to the top of the arch with the diaphragm pointing straight down. Speakers were on a deck perpendicular to the guest and arch. Maybe 80 guest seated at tables. Worked okay, nothing to write home about, but you could hear the service fine...

 20 
 on: Yesterday at 09:30:45 pm 
Started by Greg Cameron - Last post by Debbie Dunkley
The rattle in my SRX812p was caused by a piece of plastic falling off the speaker basket and intermittently - depending on the amount of cone vibration - bouncing around. This is not uncommon - there are a few posts on PSW about members having the same thing happen.  PRX speakers too. Open up and take a look - you might be surprised.

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