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Post by rockola490 on Jan 4, 2020 23:54:54 GMT
Good evening!
Trying to figure out why the bottoms speakers on my 490 are so quiet compared to the uppers.
I mean when you in plug the uppers the lowers you can barely here with the volume all the way up.
Thanks for your support!
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Post by Ron Rich on Jan 5, 2020 0:04:35 GMT
Have you looked at the Service Manual for your phono ? Are external speakers connected to your phonograph ? If not, are the connections set for jukebox only, cabinet operation ? Ron Rich
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Post by rockola490 on Jan 5, 2020 1:10:02 GMT
Yes! I do not have a test record to meter it properly. The speakers are hooked up because I tested the connections and they make noise.
They are not low impedance speakers!
Thanks,
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Post by rockola490 on Jan 5, 2020 1:10:28 GMT
No external speakers
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Post by jukenorman on Jan 5, 2020 16:40:03 GMT
On a 490, the cartridge channels are wired out of phase (like a lot of AMIs). The two 12" speakers (in parallel) see the sum of the two amplifier channels. If the cartridge is wired wrongly, the 12" speakers will see the difference - might that be your issue?
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