Wiring PA Cab, need help.

Re: Wiring PA Cab, need help.

So in order for me to get these running, I need to replace the horns and get 2 3way crossovers?

What type of speakers am I looking for to replace these horns.

Btw thanks for all the help. I think I want to get these running though, they were free and I know I can do something with them, as long as I'm not looking over $300.
 
Re: Wiring PA Cab, need help.

You don't need to replace the horns. You need to replace the drivers that belong on the back of the horns. First off is to determine what sort of mechanical connection they require. Smaller hords usually take a 1" threaded or 1" flanged connection (1" is the internal diameter.) What does the back of the horns look like?

I'm not saying these are what you want, but drivers look like this:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=264-204

or this:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=290-525

The good news is, if you're replacing the midrange drivers, you can match your drivers and crossovers with respect to frequency ranges and crossover points. You have a better chance of getting it right this way, as opposed to trying to buy crossovers for unknown speakers.
 
Re: Wiring PA Cab, need help.

SlayerSlaughter said:
Think I found the OEM 3 way x-over for the system? But now if I change the horns, they have to be within the right range? How do I know the mid range?

This is what I believe is the original 3 way x-over.
http://www.teptronics.com/cr-810.html
Click to expand...

Hey, good find. That crossover is similar to the Dayton one you posted. Don't be fooled by that "800 watts peak power" rating. Peak power is a bogus meaningless number. Dayton's 300 RMS watt rating is more believeable.

So here's what we know (assuming that really is the crossover that was in your cabs).

  1. The bass/midrange crossover point was either 800 or 1600 Hz.
  2. The midrange/tweeter crossover point was either 5000 or 7000 Hz.

With fifteens for the lows, I would choose a midrange that goes down to 800 Hz, and use that as my crossover point. For the highs, I would pick the more conservative value of 7000 Hz. (If the xover point is really 7000 Hz and we pick 5000 Hz, then you'll be stress the tweeters with frequencies that are too low, namely the 5000-6000 Hz range. Better to pick high.)

Browse Parts Express for midrange drivers that have:

  1. a throat that matches your horns
  2. a frequency range from 800 - 7000 Hz (or a bit broader)

Look also for crossovers that match, and have about a 300 watt RMS rating. With this much in the way of specs, tech support might be able to recommend your some good pairings.
 
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Re: Wiring PA Cab, need help.

Thank you so much rich. Saturday when I get a chance to get back to the studio, I'm going to be pulling out everything again and getting as much info on the speakers as I can, measure the inside of the horn. I think it was a 2" though, not sure.

So this is possible and it isn't as expensive as I thought, especially since tax returns are coming.


As said earlier, thanks a lot rich, been a big help.
 
Re: Wiring PA Cab, need help.

is he going to need a multimeter to measure the impedance of each driver in order to get a wiring diagram?
 
Re: Wiring PA Cab, need help.

tone4days said:
is he going to need a multimeter to measure the impedance of each driver in order to get a wiring diagram?
Click to expand...

Yes. As long as your gathering info, SS, check the DC resistance of each individual driver. Unwire each from everything else and read across its red & black terminals with a meter. You might hear a click from the speker when you touch the meter leads to it. The click is a good thing, it means the driver is not burned out.

The resulting numbers will not be the impedance, but they will point us to it. For example, a reading or 5 or 6 ohms DC resistance tells us it's an 8 ohm speaker. Check every driver you have, write it all down, and post the results.
 
Re: Wiring PA Cab, need help.

Awesome, ill have that Friday. This is a nice little project. I found some reviews on audio dynamics, and a lot of people say they are good speakers, especially for lows.
 
Re: Wiring PA Cab, need help.

how do the outputs of passive crossovers work? do the break the input signal into essentially isolated frequency sections, each with their own preferred impedance? or do the outputs obey the regular impedance summing rules for series and parallel?

one could imagine an 8 ohm load for the horn (mids), two 16 ohm subs in parallel for an 8 ohm load for the subs, and four 8 ohm tweeters in a parallel / serial array (8+8 in series = 16 ohms on "top" parallel branch / 8+8 in series = 16 ohms on "bottom" parallel branch) for a total impedance in the highs of 8 ohms ...
 
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Re: Wiring PA Cab, need help.

tone4days said:
how do the outputs of passive crossovers work? do the break the input signal into essentially isolated frequency sections, each with their own preferred impedance? or do the outputs obey the regular impedance summing rules for series and parallel?

one could imagine an 8 ohm load for the horn (mids), two 16 ohm subs in parallel for an 8 ohm load for the subs, and four 8 ohm tweeters in a parallel / serial array (8+8 in series = 16 ohms on "top" parallel branch / 8+8 in series = 16 ohms on "bottom" parallel branch) for a total impedance in the highs of 8 ohms ...
Click to expand...

See I was thinking something along those lines for the ohms. But I'm gonna make sure tomorrow.
 
Re: Wiring PA Cab, need help.

I'm no expert on crossover design, but they can basically be designed to work with any set of drivers, within reason. The resulting crossover will provide a nominal impedance to the amplifier.

There a whole forum of guys at Parts Express that do this sort of stuff for fun, but we don't need to get that complicated. Sound reinforcement systems follow a pretty tight set of standards with fairly interchangable parts. Hifi speakers have way more choices.
 
Re: Wiring PA Cab, need help.

Well luckily I'm not so much of a noob with wiring, so i know to do series or parrellel and what not. Going to the studio today to get all the info. Hopefully I can find my reader to test these speakers.
 
Re: Wiring PA Cab, need help.

Okay so unfortunately I couldn't get my hands on a multimeter, so I couldn't get information.


Does anyone know a way to contact audio dynamics? Wouldn't they know what's in here and can tell me?
 
Re: Wiring PA Cab, need help.

possible ... google might know ... if you can trust what they tell you

radio shack - $20 or less for a multimeter ... even cheaper from online outlets ...

good luck
t4d
 
Re: Wiring PA Cab, need help.

SlayerSlaughter said:
Okay so unfortunately I couldn't get my hands on a multimeter, so I couldn't get information.


Does anyone know a way to contact audio dynamics? Wouldn't they know what's in here and can tell me?
Click to expand...

Even if you could get contat info, I suspect you'd need to be able to speak Chinese.
 
Re: Wiring PA Cab, need help.

If the Tweeters are anything like these
PYLPSN1167.PNG


or similar Piezo Tweeters which is what they probably are, you don't need crossovers for them. They're rated at 400 watts .


Piezo Horn Tweeters - 400 W

This unit is similar to the KSN1005. Does not require a crossover and is perfect for use for general PA applications where long throw is required. These piezo horn tweeters have built-in protection to allow them to handle 400W RMS. At high power levels, a PTC opens, allowing the tweeter to continue to play at a compressed power level.
Impedance: 8 ohms
Input power: 20 WRMS, 75 W max.
Frequency response: 1kHz - 20kHz
Sensitivity: 93dB ±3dB at 0.5m
Dimensions: A - 85, B - 101, C - 75, D - 70
Click to expand...
Look carefully on the back of the tweeters for a Part/Production number or other info. It's quite often stamped into the plastic which is often black, which makes it hard to see.
 
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Re: Wiring PA Cab, need help.

Your mid ranges are easily replacable and you should be able to get seperate drivers for them but at this sort of price why bother.
Once again , a 400 watt rating.

Retail Price: $ 29.95
Our Price: $ 26.96

Similar to the KSN1142 piezo. This tweeter horn combination is not like the conventional exponential horns that we commonly see which disperses the high frequencies on a very narrow beam, it utilises a Constant Directivity (CD) horn which offers a uniform frequency response dispersion through its multi- taper design.

Impedance 8 ohms
Frequency response: 1.8kHz - 20kHz
Sensitivity: 93dB �3dB at 0.5m 1 watt
Max input power: 400W RMS
Dimensions: A - 265/112, D - 205


Interior-Accessories-Audio-Video-CT1934-Piezo-Horn-Tweeters-400-W.gif

- http://www.myshopping.com.au/ZM--564970047_Speakers_and_Subwoofers -
Click to expand...
.

This an item available down under but it should be just as available in the US and Cheaper.

Piezo horns may not require a crossover either. I'm not 100% sure on that.
Try googling piezo horns and wiring.
 
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