When an amp puts out 90 watts....

into 16, 8, or 4 ohms, what does that tell me about the amp? I am use to seeing an amp's output increase, sometimes even doubling, when going from say 8 ohms into 4 ohms.

The amp in question is the Copland CTA 506.

finsup05-15-2013 11:09pm

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zd542 Details Discussions Posts This discussion Message User 5,339 posts 05-16-2013 at 10:20am Copy Comment URL Report Comment Edit Delete Its probably a tube amp.
lenny_zwik Details Discussions Posts This discussion Message User 259 posts 05-16-2013 at 02:16pm Copy Comment URL Report Comment Edit Delete That its power supply is capable of sourcing the increased current necessary to provide constant power across decreasing impedances.
stevecham Details Discussions Posts This discussion Message User 3,298 posts 05-16-2013 at 02:32pm Copy Comment URL Report Comment Edit Delete As Zd says, and I just confirmed, it's a tube amp. This is how tubes amps typically spec. Nothing to get worried about. And by the way, only a very few solid state designs with massive power supplies are able to double power into halved impedances. This is NOT the norm.
rrog Details Discussions Posts This discussion Message User 1,958 posts 05-17-2013 at 03:07pm Copy Comment URL Report Comment Edit Delete "This is NOT the norm." It's the norm for some people.

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