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Topic: Stewart PA100 Bridged Ohms |
Jeff Watson
From:
Anza, CA. USA
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Posted 5 Aug 2011 3:58 pm |
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| What happens if I run a Stewart PA100 in the bridged mono mode (where it supposedly wants to see 8 ohms) into a 4 ohm cabinet? I've already gigged with it this way and it was borderline able to keep up and didn't blow up. Did I just get lucky? What kind of power might it be putting out? |
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Jay Ganz
From:
Out Behind The Barn
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Posted 6 Aug 2011 6:21 am
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Last edited by Jay Ganz on 14 Aug 2011 8:46 am; edited 1 time in total |
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Dave Grafe
From:
Hudson River Valley NY
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Posted 6 Aug 2011 8:28 am
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| ...running your "8-ohm minimum" bridged amp into a 4-ohm load is like hooking both channels up to a 2-ohm load, certain disaster awaits.... |
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Rich Santucci
From:
Perkasie Pennsylvania USA
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Posted 6 Aug 2011 8:39 am
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Jeff,
Did you actually prepare the amp for Bridged Mono operation per the manual? Just pressing the button does not put it into Bridged mode.
The specs are a bit confusing, but it says it will put out 180Watts into an 8 ohm load in Bridged mode.
http://www.stewartaudio.com/manuals/PA%20Series%20-%20Manual.pdf |
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Jeff Watson
From:
Anza, CA. USA
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Posted 6 Aug 2011 8:55 am
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| Yeah Rich thats the spec sheet that brought this up and yes I do have it properly wired for bridged mono. I thought that I had seen somewhere that it could be run into either a 4 OR 8 ohm load. Other sources seem to contradict this. |
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Rich Santucci
From:
Perkasie Pennsylvania USA
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Buddy Castleberry
From:
HAWKINSVILLE GA USA - R.I.P.
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Posted 8 Aug 2011 7:53 am
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JUST TALKED TO THE STEWART PEOPLE
YOU CAN RUN THE 100B IN THE BRIDGE MODE
INTO 8 OHMS OR 4 OHMS AT 180 WATTS
THEY SAID THE THING TO WATCH FOR IS TO HAVE IT WELL VENTILATED THAT IT DOES RUN A LITTLE HOTTER
ONE OF THEIR TEST IS BRIDGE INTO 4 OHMS
IVE USED THSE BEFORE AND JOHN HUGHEY ALSO USED THEM
WE NEVER HAD ANY PROBLEMS |
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Jeff Watson
From:
Anza, CA. USA
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Posted 8 Aug 2011 9:31 am
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| Buddy....you da man! Thanks |
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Stephen Silver
From:
Asheville, NC
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Posted 13 Aug 2011 7:58 am
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I've been using 2 PA100 bridged into 4 ohms for several years.
Works fine, mounted in the floor of my speaker cabs.
SS
_________________
Life is mostly Attitude and Timing |
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Lonnie Bennett
From:
Upstate New York
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Posted 15 Aug 2011 7:08 pm
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Rich Santucci wrote:
| Quote: |
Jeff,
Did you actually prepare the amp for Bridged Mono operation per the manual? Just pressing the button does not put it into Bridged mode. |
Please forgive my ignorance in this subject but what is the preparation that needs to be done to the amp and where can the instructions be found?
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Big Ben |
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Rich Santucci
From:
Perkasie Pennsylvania USA
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Lonnie Bennett
From:
Upstate New York
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Posted 16 Aug 2011 9:07 am
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Excellent. Thanks Rich. That is a huge help. Now I just need to properly size or spec out a speaker for it. I it true that a speaker rated for 60 watts @ 8 ohms would be more than enough? Or should get one equal or greater than the amps power spec? Thanks again.
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Big Ben |
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Rich Santucci
From:
Perkasie Pennsylvania USA
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Posted 16 Aug 2011 12:16 pm
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Lonnie,
I would recommend a speaker rated for at least the 100watts the amp is putting out. More would be better! |
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