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Old 25th May 2013, 10:55 PM   #1
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Default PA AMP?

Just picked this up and am wondering the best way to use it... is it just an xlr in, mini in and mini out with speaker? Seems like a pretty heavy duty amp, am I right?
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Old 26th May 2013, 04:41 AM   #2
DUG is offline DUG  Canada
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Speaker power rating?

Fuse size?

Power supply voltages?

What devices are on the heat sink?

Heavy duty is a relative term.

What did you want to use it for?
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Old 26th May 2013, 09:30 PM   #3
JMFahey is offline JMFahey  Argentina
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Looks homemade.

And that XLR connector is not a microphone one, because it's male and has 4 pins.

Weird.

Did you pick it up at a pawnshop or garage sale?
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Old 28th May 2013, 12:30 PM   #4
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My mixing console uses a 4 pin XLR to connect to its external power supply.

It's the only time I've come across 4 pin XLRs in action.
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Old 28th May 2013, 01:00 PM   #5
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Maybe so, but I'd hope that the XLR pins weren't that way. If that connector's for power, someone's gonna get some volts if they poke their finger in there.

Not much of an issue at, say, 12v DC, but good practice carries over to the bigger stuff, where you really don't want to be anywhere near the pins of a 125A 3-phase...
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Old 28th May 2013, 01:42 PM   #6
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In the case of my console the pins carry +17V, -17V (each at 1.25A) and +48V (125mA) plus a common return path.
The 17V ones power the mixer, the 48V is phantom power for microphones.


No idea what the 4 pin XLR in the OPs photo does. Being male it would indicate an output and it seems to be connected to the units psu.
May be it is there to slave additional passive units to the one he has.

Wonder what 'WIG Moderator Serial' means...

Last edited by Charles Darwin; 28th May 2013 at 01:49 PM.
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Old 28th May 2013, 02:07 PM   #7
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PS: Googling 'Audiovox AVX coaxial speaker'.

Seems to be a very cheap car speaker ($8.99 the pair), possibly made by Jensen.

I'd guess whatever the thing does is not directly audio related and the speaker is just there to give an audible indication that the unit is working.
On the other hand I could be completely wrong.
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Old 28th May 2013, 08:27 PM   #8
JMFahey is offline JMFahey  Argentina
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Quote:
Originally Posted by Charles Darwin View Post
PS: Googling 'Audiovox AVX coaxial speaker'.

Seems to be a very cheap car speaker ($8.99 the pair), possibly made by Jensen.

I'd guess whatever the thing does is not directly audio related and the speaker is just there to give an audible indication that the unit is working.
On the other hand I could be completely wrong.
Well, it *is* a powered speaker, but as I said before, it looks homemade.

Nothing against, of course.

Just thinking aloud, it might be a mini PA system for an acoustic guitar player/singer , with the XLR feeding some external mixer or active guitar, and the 1/8" providing inputs for a backing track (casette/CD/MP3).
In a low power situation, a coaxial car speaker is a good cheap solution, they sound very good, are inexpensive and very easy to use, you just connect them and don't have to worry about tweeters or crossovers.

Only problem is that they are not efficient, but sometimes that's not *that* important.
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Old 29th May 2013, 11:21 PM   #9
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It's the 'WIG Moderator Serial' legend that is throwing me.

If it wouldn't be for that I'd agree in a split second.
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