How to find out the resistance of an NXT panel? - diyAudio
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Old 29th April 2010, 01:48 PM   #1
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Default How to find out the resistance of an NXT panel?

Hi all, first post here I have some 2'x3' NXT panels I bought off ebay some years ago and have just bought a new amp which requires adjusting of the ohmage according to the speakers resistance. Thing is I nowhere on these panels does it say what the resistance is nominal or otherwise. Can somebody advise me how I could find out what the resistance is on these speakers - they are a very obscure make '3nod'
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Old 1st May 2010, 06:44 AM   #2
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If you measure the DC resistance with a simple multimeter,
that should be sufficient to adjust your amp.

Just choose the value equal to the DC resistance or closest below.
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Old 1st May 2010, 01:57 PM   #3
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thanks for the reply. I have tried using a multimeter but nothing is registering with the NXT panels. I tried it with normal speakers to see if I had the right settings and they are registering but the Nxts nothing
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Old 2nd May 2010, 12:28 PM   #4
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Do you mean, you cannot measure the DC Resistance ?

Is it very high or very low ?


Usual panels have dynamic exciters with normal voice coils.

So there should be a DC resistance between 3 and 8 Ohms.

Either there is something damaged or you may have panels
driven by piezoelecric exciters ... i don't know.

Have you got a picture ?
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Old 2nd May 2010, 01:30 PM   #5
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The NXT panels can't be measured with an ohmeter as they are a complex (capacitive) impedance. Your amp should be set to work with an 8 ohm load.
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Old 3rd May 2010, 05:44 PM   #6
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richie, do you know how these are driven ?


Flat panel speakers with usual dynamic exciters have normally
a pretty flat - mainly resistive - impedance.
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Old 3rd May 2010, 06:29 PM   #7
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They are not usual flat panels with usual dynamic exciters.

edit: hmm, looking on NXT website though they claim dynamic exciters with voice coils similar to conventional drivers. I'm sure this is different from how they first started out.
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Last edited by richie00boy; 3rd May 2010 at 06:33 PM.
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Old 3rd May 2010, 07:57 PM   #8
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well I am definitely getting no readout at all with a multimeter
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