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Old November 21st, 2012, 07:07 AM   #1
Lousypirate
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Amp and pa speaker question

I picked up a pa speaker for my cb, 100w one off of a fire truck.

I then purchased a 2 channel pyle amp for it, since it already had the headphone jack in. it was priced right too.

I am fairly confident that the wattage out will never exceed 100w, so can I put both channels out to the speaker? I'm not suite if it is noise or something else, but the voice sounds choppy

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Old November 21st, 2012, 09:02 AM   #2
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Bridge the channels.
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Old November 21st, 2012, 09:22 AM   #3
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Bridge the channels.
Are all amps bridgeable? This one doesn't say it is... it feels like the sound coming out of it is only half there, like I'm talking into the mic and it cuts between left and right(not evenly), and I only have the speaker hooked up to one side.

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Old November 21st, 2012, 09:51 AM   #4
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Does the amp have 2 input channels and 2 outs?

By microphone do you mean CB on PA mode? The problem could be in the cb.

What is the impedance of the speaker and what is the amp rated for?
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Old November 21st, 2012, 10:56 AM   #5
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Originally Posted by redhead_823 View Post
Does the amp have 2 input channels and 2 outs?

By microphone do you mean CB on PA mode? The problem could be in the cb.

What is the impedance of the speaker and what is the amp rated for?
Damn you david, I can't answer all of those from my desk.

In order:

No, headphone jack in, two channels out

Yes, not likely, other pa speaker worked fine, but that was direct headphone jack in to speaker

I believe the speaker was 2 ohm
The amp specs say 2x150 peak (not rms) at 4 ohm, reviews say that it is only about 40w rms if I remember correctly

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Old November 21st, 2012, 02:42 PM   #6
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Originally Posted by Lousypirate View Post
Damn you david, I can't answer all of those from my desk.

In order:

No, headphone jack in, two channels out

Yes, not likely, other pa speaker worked fine, but that was direct headphone jack in to speaker

I believe the speaker was 2 ohm
The amp specs say 2x150 peak (not rms) at 4 ohm, reviews say that it is only about 40w rms if I remember correctly

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Headphone jack is 2 channels normally. What kind of cable are you using? Does the other PA speaker plug have 2 or 3 contacts?



What model is the amp? 2 ohm is below the amp rating (the bad way), but it shouldn't cause a problem like this. I ran a setup that way for a while.
Does the amp/speaker work with other audio sources?
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Old November 21st, 2012, 02:53 PM   #7
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Originally Posted by redhead_823 View Post
Headphone jack is 2 channels normally. What kind of cable are you using? Does the other PA speaker plug have 2 or 3 contacts?



What model is the amp? 2 ohm is below the amp rating (the bad way), but it shouldn't cause a problem like this. I ran a setup that way for a while.
Does the amp/speaker work with other audio sources?
Headphone aux cable from back of pa to input of amp.

Two channels out, using one channel to speaker wire, to the two contacts on the pa.

My thoughts were that this it not a big deal since the same noise is coming through both channels since I'm talking to a mic. I can show you on monday...

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Old November 21st, 2012, 02:53 PM   #8
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Amp model is plmpa35 by pyle

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Old December 7th, 2012, 02:48 PM   #9
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To put closure on it, We discovered that I needed to use it like a mono style amp. I switched to the other channel and worked fine. Not sure why I was getting feedback on the supposed "unused" side.

I do get a strange amount of output from the PA when in CB mode. It is not in the ext speaker mode.
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