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AR Lst general questions

gwendal

gwendal

Member
Hi everyone

So i just acquired a really nice pair of mint AR LST , they are in a really good shape and were always maintened as they were in a pro environnement , i have a few questions that some expert here might know about !

My first question is about the impedance , those are 4 ohm speakers , when i measure with multimiter at speakers port it reads 10.4 ohm , i know that sepaker resistance isnt exactly impedance but this is really weird as i normally find values closer to the rating ( ie a 8 ohm speaker will often read around 6 ohms on multimiter ) .

I read there and there that a 10 ohm resistor was added to the 2500 uf cap to protect amps from failing ...

Now my concern is that i run them throught a PL 400 for now ( it has been upgraded and beefed up by pro ) and those phase linear amps are known to not handle well a loads under 4 ohm , on the paper the AR lst are supposed to go down to 2 ohm in certain frequency range ..

My question is mostly about this 10 ohm read out of speaker , does this mean the speakers wont demand a 2 ohm load any longer or is that totally irrrevelent ??
 
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That's weird. Usually DC resistance readings are lower than the rated impedance. Are the pots working? If you exercise them while observing the resistance, do the values change?
Which is a different issue than the Phase Linear/4 ohm speaker problem. I suspect that the amps may not be ideal for the speakers. Whether the speakers or the amp matter more to you, I can't say.
 
Nat said:
That's weird. Usually DC resistance readings are lower than the rated impedance. Are the pots working? If you exercise them while observing the resistance, do the values change?
Which is a different issue than the Phase Linear/4 ohm speaker problem. I suspect that the amps may not be ideal for the speakers. Whether the speakers or the amp matter more to you, I can't say.
Click to expand...
Hi yes the only pot on it works and slghtly change Dc , but the most general question is about the fact there is a 2500 uuf cap with 10 ohm parralel in there from past maintenance is the reason i find 10.4 ohm dc ...
 
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