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Old 25th October 2013, 01:38 PM   #1
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Default Amplifier for passive speaker system?

I have some passive, Yamaha PA speakers that I am unable to use right now because I don't have an amp. I would like to install some small amps into the cabinets, essentially turning these into active speakers.

My question is, where should I look for amps? I only need something small, around 100-150W per cabinet, and I can source the power supply from my work(I am an Electrical Engineer). I've seen the panel amps, but this isn't what I'm looking for. All I need is a basic 100-150W audio amplifier, with no power source, to keep this cheap.

I'm also assuming I will need high and low pass filters. What is good source for these when it comes to audio?

Thanks in advance!

Edit: I could find a cheap car amp, but I thought there may be a better option.

Last edited by hockeyadc; 25th October 2013 at 01:57 PM. Reason: Added info
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Old 28th October 2013, 11:12 AM   #2
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I wouldn't use car amps - their specs are mostly imaginary, and you've got to provide VERY high current 12V for them - they are also unlikely to survive PA use.

You might try these excellent modules:

Modules

Why would you need filters?, don't the speakers already have cross-overs built-in?.
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Old 1st November 2013, 01:04 AM   #3
JMFahey is offline JMFahey  Argentina
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Quote:
All I need is a basic 100-150W audio amplifier, with no power source,
There is no such a beast.
You will *always*need a power source.
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Old 2nd November 2013, 01:33 AM   #4
Enzo is offline Enzo  United States
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Juan, if I read him right, he is looking for the amplifier modules and plans to provide his own power supplies.


What I don;t follow is the advantage that provides. To mount amplifiers in the cabs, then provide power connections either to external power sources or to add power supplies ALSo in the cabs, versus simply gettting small plain old power amps that connect to existing systems, I don't see the plus side.


And frankly, if I were committed to putting an amp in the cab, a plate amp would be my first choice.
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Old 2nd November 2013, 01:13 PM   #5
JMFahey is offline JMFahey  Argentina
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Well, maybe.
But he didn't state what kind of power supplies, what voltage and current range he may get.
Withyout that, it's impossible to suggest anything.

And agree with plate amps.
Thanks to cutthroat competition and large potential market, they often are cheaper (complete, including crossovers and PSU and ready to plug-in) than equivalent power amp kits.

What's "standard" and/or massively produced, is always the cheapest.
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Old 4th November 2013, 12:47 AM   #6
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Quote:
Originally Posted by hockeyadc View Post
I have some passive, Yamaha PA speakers that I am unable to use right now because I don't have an amp. I would like to install some small amps into the cabinets, essentially turning these into active speakers.
What's your budget?
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Old 5th November 2013, 07:13 PM   #7
troystg is offline troystg  United States
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Dayton Audio PMA250 250W PA Module with Mixer 300-797
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