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 on: Today at 04:35:36 am 
Started by Biospherix - Last post by Biospherix
Hello everyone. New here so please excuse me if this isn't the correct thread.

Setting up a Live System with the following equipment;

Wharfedale Pro CPD 1000 Power Amp
PEAVEY PV23XO Active Crossover
2 x Wharfedale Titan 12 Passive
1 x Wharfedale Pro Impact 18B Sub

Question is,

1. From the Power Amp, can I run both the Titan 12 Passives from CH1 in a daisy chain, then then the sub from CH2.
2. All connections are SpeakOn, do I need 2 core cable, or 4 core cable to the connectors if I'm daisy chaining the Titan 12s.

Thank you for any advice in advance.


 on: Today at 03:15:39 am 
Started by Rodney Connelly - Last post by Steve M Smith
They even have two cabinets stacked referred to as a line aray.


 on: Today at 02:59:48 am 
Started by Rodney Connelly - Last post by Peter Morris
Hey, Iíve been looking for a new pair of computer speakers!

Here you go

 on: Today at 02:27:15 am 
Started by Reo Garvin - Last post by zack boupha
Hey, I have been tasked with upgrading our school pa system so it can handle events in the Gym. Our gym is pretty standard baskeball court sized, very little room at the edges, about 100' by 60', 20 ft ceilings....

Currently our big test is Commencement with 700 attendees. Our system is currently a Peavey XR8600D with four peavey PR 15 loudspeakers on stands. The biggest complaint is it isn't loud enough at the back.....

I am worried about budget but might have as much as $6000 to spend. I would like to stay portable because we also use the system in the cafeteria for grade 7/8 dances, and maybe high school dances. Small school 200 kids at a dance would be alot. The PA is older, and so are two of the speakers, I have replaced tweeters in two and a sub in one already. Brand new equipment probably a good thing. Subs would probably need to be off to the side for assemblies as the look might be off putting for events.

I am open to active or passive speakers, could go wireless if it makes sense technically or economically.


Do some reading and go demo yamaha dsr115.  I see rave reviews on them.

 on: Today at 01:49:51 am 
Started by Bill McIntosh - Last post by Jonathan Johnson
I drew this graphic up a while ago to help me better understand the various voltage drops in a typical power distro system, and what certain measurements could possibly mean. I try to go into every voltage or current test situation with at least a guess of what measurement to expect. If the voltage measured doesn't line up with my expectations, then there's a hint as to what's wrong. For instance, as you load a typical home branch circuit with more current draw and approach 20 amperes, you'll likely come close to a 5% voltage drop. So 120 volts drops by 6 volts to 114 volts. But only 3 of those volts are on the hot/line conductor. The neutral conductor does an equal and opposite "rise" in voltage, so it will create a voltage difference if you measure between it and the grounding conductor. This basic knowledge is essential to troubleshooting any grounding system. That's because all wires have resistance. And resistance always results in a voltage drop if there's any current draw. It's a fundamental law of electricity.

Let me see if I can simplify it.

Measuring between hot and neutral, you are measuring against a loaded neutral. The load on the neutral causes a voltage drop.

Measuring between hot and ground, you are measuring against an unloaded ground. There is no voltage drop on the ground.

Voltage drop is a function of wire resistance and load. Where there is no load, wire resistance is mostly irrelevant for a high impedance voltmeter. The voltage drop on the hot wire is irrelevant in this comparative analysis; it doesn't make a difference in the math because we are not measuring the voltage differential between the beginning and end of the hot wire. (But that is what we are effectively doing with the neutral wire.)

The difference between the hot-neutral voltage and the hot-ground voltage should equal the neutral-ground voltage reading. The neutral-ground reading is equal to the voltage drop on the neutral.

 on: Today at 12:02:38 am 
Started by Tim Hite - Last post by Tim Hite
Yes, the 200 is more expensive, but i think not in the long run. I have some 200's 15-20 years old and have been used hundreds of times
. . .Factor in the other advantages, and the financial stress goes away very fast, at least in my mind.

Glad you like the k&m stuff.

I'm still in debate over the wobbly feel of the shock absorbers in the 200. It's a trick setup, for sure. I have one of each sitting side by side in my living room and keep playing with them and pondering. . .

I used the flat square base speaker stands for a wedding this weekend at the Loewe Estate in Palm springs. They really look a lot better than tripod stands. Put RCF TT052a with K&M tilters on top. Got compliments on how it looked and the fact that it didn't suck up any floor space indoors.

Also used the stackable one-handed clutch stands. Not only did the moms from Texas singing a surprise song figure them out, several drunk 20-something girls figured them out all on their own and started taking selfies with them. No accidents, so I'm going to call it a success story.

Now I just need to ditch my scary Monoprice light tree. . .might be able to sell it for enough cash to buy a six-pack. If I were to guess, the six-pack has more aluminum in the cans than this light stand.

 on: Yesterday at 11:41:14 pm 
Started by MIKE Lynn - Last post by MikeHarris
About the only thing is has in common with the servodrive is that the driver is round and it produces sound.  It pretty much stops there.

Both share a non-conventional method of driving the round thing that produces sound.

Every few years my client Byron Lee (RIP) would have me order belts for his SDL subs. Anything wear out on the PSoft ?

 on: Yesterday at 11:18:42 pm 
Started by Rodney Connelly - Last post by Jonathan Goodall
Not much use....... I can order the tops okay and get it within a week but they won't ship the 12 inch sub to NZ.............  Gutted :(

 on: Yesterday at 10:47:29 pm 
Started by Callan Browne - Last post by Callan Browne
I'm not saying you shouldn't strap the 818 to the 828, but I don't see why (without a strap) it would be any less stable than if the 818 was on the floor?
And the fact that you likely need shorter pole, I think there would be less likelihood of tipping, than just the 818 on the floor.

Yep, I think you are right. If somebody was drunk and pushed on the (now shorter) poll, they would potentially also have less leverage as they are closer to the base of the poll.

The idea of a 25Kg speaker on a poll, on a sub, on another sub... I guess on paper it just made me question it enough to throw the question out to this audience.

The venue we're playing next month where I'll use all my subs for the first time, the stage is actually really quite small for our 5 piece.
I looked some online photos from events at the same venue and I'm pretty sure my 828SP is going to be front and centre of the stage, with 1 or 2 foldback sitting on top.
This will both gain us some valuable stage space along with helping a bit with the monitor angle (SRX812P- not a bad angle, but you don't want to be sitting on top of it if possible).

I don't know what this is going to mean for bass/kick coming back on our stage. I guess I'll find out soon enough.

I would imagine by just the weight of the 818 alone, would keep it quite stable. I would cheat a little and move the 828's out a little so that the feet cups line up with the feet of the 818. This should leave about a 2' gap between the 828's, which may or may not have adverse effects? An idea anyway.
Thanks Luke, I'll try that later tonight.
I don't want the top to be on an angle because 2 feet are in and 2 feet are out. I'll see how much of an issue that is.

 on: Yesterday at 10:37:35 pm 
Started by TJ (Tom) Cornish - Last post by TJ (Tom) Cornish
I had an event yesterday in a room that I have been in before - a fairly large event center.  There are 14-50Rs around the room, and I had used this particular receptacle before.  I resisted the urge to plug in and go, and instead took my own advice and tested it.

Boy am I glad I did.  The room had a recent renovation, and this receptacle was apparently touched, and in the process of whatever they did, ended up being miswired as a H-H-H-G instead of a H-H-N-G.  In other words, the neutral terminal was connected to the third phase hot leg, which caused both legs of my distro to be 208v instead of 120v. 

I avoided release of the magic smoke, but only barely.  As I mentioned, I had used this exact receptacle previously, and at the time it was fine.  I was able to find a different 14-50R that was correctly wired and I notified the venue to tag and repair this receptacle, but this was a good reminder to me and hopefully to others to never assume anything.

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