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Can a AMP be forced to do this?


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skoldspuppy 
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Posted: January 03, 2005 at 7:11 PM / IP Logged  

Greetings all,

Ok a theoretical question for you if a amp has the following stats

100 Watts RMS x 2 channels at 4 Ohms

200 Watts RMS x 2 channels at 2 Ohms
400 Watts RMS x 1 channel bridged at 4 Ohms

And you wire up two 4ohm subs in parallel you would get an impedance of 2 ohms right?

Now if you connected it to the amp bridged it should work correct , but make the amp overheat?

Now if the amp was cooled with extreme measures, “for this question we will go with liquid nitrogen” It would be physically impossible to overheat it correct?

Would subs now be the point of failure? Or would this insane theory actually work

Just some thought provoking conversation

Laters

Skold

boucher911 
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Posted: January 03, 2005 at 7:19 PM / IP Logged  
no ,it will not fork because the amp can only do so much until it will over do it and quit on you
DaBouch
skoldspuppy 
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Posted: January 03, 2005 at 7:25 PM / IP Logged  

So since heat wouldnt be an issue, It would then be a mechincal failure on the amps part?

DYohn 
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Moderator spaceThis member has made a donation to the12volt.com. Click here for more info.spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: April 22, 2003
Location: Arizona, United States
Posted: January 03, 2005 at 7:27 PM / IP Logged  
skoldspuppy wrote:
And you wire up two 4ohm subs in parallel you would get an impedance of 2 ohms right?
Now if you connected it to the amp bridged it should work correct , but make the amp overheat?

Now if the amp was cooled with extreme measures, “for this question we will go with liquid nitrogen” It would be physically impossible to overheat it correct?

You are basically correct.  If you can dissipate the heat, it will "work."  In a super-cooled situation, you could place a very low resistance (much less than 0.01 ohms) on a transister output and it will deliver current as long as that current is available.  The power supply necessary to provide the current is the key once the cooling is taken care of.  No real practical application I can think of, and certainly none in any audio application, but it is theoretically possible.

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boucher911 
Member - Posts: 27
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Joined: January 02, 2005
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Posted: January 03, 2005 at 7:27 PM / IP Logged  
no heat is an issue but everything has a limit you just have to find the limit of the amp
DaBouch
skoldspuppy 
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Joined: July 11, 2004
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Posted: January 03, 2005 at 7:52 PM / IP Logged  

Thanks to both of you,

I kind of thought it would work as long as you could power it and keep it cold, I agree it wouldnt be practical , but it would be one heck of a show to see and hear

Thanks


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