Cyrus power 8 hissing

Darrell02

Standard Member
Joined
Oct 20, 2014
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Hello everyone,
I recently purchased on eBay a Cyrus power 8 to drive my mission sx5,s. It is connected to a marantz sr7007 receiver.
When I switch on the marantz there is a low but very piercing sound comes from the speakers.
Any ideas on how to fix would be much appreciated.
Darrell
 

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