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Post subject: JBL speakers
Posted: Fri May 04, 2012 2:28 pm
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Hobbyist
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Location: Spencer, MA
Hi, I have two JBL D131's. They are both in great shape, and was wondering if I could install them both into my 74 Twin reverb amp? being one is 16 ohms, the other 8 ohms? if not, should I just use one of them for now? thanks for your time!


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Post subject: Re: JBL speakers
Posted: Fri May 04, 2012 4:49 pm
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Location: Natural Bridge, Virginia
Your amp uses two 8 ohm speakers wired in parallel for a total load of 4 ohms.

Can you intall your two speakers in the amp? Sure. It may not sound the best that it could due to the impedance mismatch.

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Post subject: Re: JBL speakers
Posted: Fri May 04, 2012 7:48 pm
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Bluesky, you know a 16-ohm and 8-ohm speaker tied in parallel =

(1/16) + (1/8) = 1/R total

= (0.0625) + (0.125 ) = (0.1875 )

R total = 1/ (0.1875) = 5.33 ohms.

Prolly close enough to the nominal 4-ohm tap to be ok. Maybe, a slight drop in potential output power...


FWIW...


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Post subject: Re: JBL speakers
Posted: Fri May 04, 2012 8:40 pm
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Location: Natural Bridge, Virginia
I didn't bother calculating the actual total impedance, just said you can install them but they might not sound the best. It might sound better for all I know. :wink:

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