Question about Marantz Ma-500 Monoblock Thx Amplifiers 3
I am running two MA 500's to my front speakers (bi-amped not bi-wired). I got careless while changing speakers and the speaker wires touched + to - . I now cannot get power on the amp whose wires touched and the other that is connected by RCA (daisy chained) is now buzzing and the standby light is on whenever the amp is powered up. I can still get signal to the speakers while the standby light is on... Please help!
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Posted on Jan 02, 2017
All transformers buzz though you cannot hear it normally. The big transformers on power lines like to buzz for all to hear. When a transformer in a stereo amp gets old and deteriorates or gets hot and expands the coils, melts the coil varnish and epoxy coatings then rattles at 60 times per second. You can ignore it or change the transformer. There are too many layers of windings to try to stick anything in there. Disconnecting a transformer results in inductive kickback -that's not money. It's a big, whopping electrical gotcha! Be careful! Good luck, Steve Medley
Posted on Nov 09, 2008
Connect a set of stereo RCA cables from the 'Output 2' on the Hafler to the line imputs on the Sub.Turn on the '1+2' output switch on the Hafler and rock out!
Posted on Dec 17, 2008
Hello there Ed.
For anyone that has ever had such an issue with a MARANTZ SR series (6001. 7001. 7002. 8001...etc...) issue a question and I do HAVE the answer.
I could be just anything, or just the low quality binding posts used by MARANTZ for that.
Please describe to me in details how you've connected your speaker wires at the back, and give me description when and how did this problem came up.
Posted on Nov 04, 2010
It needs to be serviced. Bad caps, resistors, & possibly a transistor or two. Not an unbearable repair, but you can count on it being 100-175 depending on the shop. You followed all the troubleshooting you could without opening the unit.
Posted on Oct 02, 2013
There could be a short in one (or more) of the speaker connections. Try disconnecting all speakers and turning on the receiver. If it still switches to standby, there may be an internal problem.
Posted on Mar 03, 2014
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