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HK AVR 255 software updation


New Member
Jan 8, 2010

I have Harman Kardon AVR 255 receiver with HKTS 11b speakers.

As per I HK I have to update software of my receiver.

Anybody can clear my following doubts.

1. can I switch on my receiver without connecting the speakers to it.

Is it safe to switch on the receiver without connecting the its speakers?

2. can I update the software of my receiver without connecting the speakers to it.
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