Is my speaker ok to use with my tube amp?? - diyAudio
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Old 27th April 2014, 02:30 PM   #1
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Default Is my speaker ok to use with my tube amp??

Hi,
I have a 5 watt valve head for my Guitar that I recently bought, and am saving up to buy a good speaker. For now, I want to try it out, but all I have is the 6 inch speaker from my old Laney solid state combo. I measured the resistance across the two terminals of the speaker, and it read 4.7 ohms. Is this ok to plug into the 4 ohm tap of my amp, or should I use the 8 ohm tap, or neither?
I know that its generally not a good idea to have a higher impedance speaker than the socket, and it might kill the OT, but seem as it is 0.7 volts, I have no idea.
Thanks in advance!

Billy
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Old 27th April 2014, 05:56 PM   #2
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Last edited by azazello; 27th April 2014 at 06:03 PM.
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Old 27th April 2014, 06:33 PM   #3
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It will be fine, but 4.7 ohms resistance is about what we expect from an 8 ohm speaker. So it would be better to plug in to the 8 ohm tap.
(The nominal 8 ohms of a speaker is a 'reactive impedance' which includes the coil inductance etc. as well as the resistance.)
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Old 27th April 2014, 06:39 PM   #4
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Thanks guys. Malcolm that makes sense now. Cheers.

Billy
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Old 27th April 2014, 06:52 PM   #5
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:Cop: Since this is guitar amplifier related this thread really belongs in the Instruments & Amps forum where I'll move it.
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Old 27th April 2014, 06:56 PM   #6
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Ok that's fine. Thanks
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