2. home-theater
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popping noise when switching tv channels

I have a Time Warner cable box. Sometimes when I switch channels there is a loud popping noise but not all the time. The sound cable(coax) from the cable box (Scientic Atlanta 3200HD)feeds into my Mcintosh MX135 pre/pro. All my components are fed power from a Panamax 5500EX surge/AC regeneration unit.
Any thoughts on what can be done to eliminate this noise??
edkoz
5 responses Add your response
edkoz OP
24 posts
 
Switching the audio output of the cable box from coax to optical solved the problem. I called Mcintosh and they said it appears that the cable box was "throwing DC" when changing channels. I guess it was!
edkoz OP
24 posts
 
Thanks for the info. I will call Mcintosh in the am. I am using the MX135 Mcintosh pre/pro.
rwwear
2,867 posts
 
You are losing the digital lock when you change stations. Using the analog setting will prevent this but you will lose Dolby Digital. Your processor may have a software update that will prevent the popping.
chadnliz
3,736 posts
 
I get that also sometimes, Hold in the power button till it reboots and it should go away.
d_edwards
204 posts
 
The sound cable(coax) from the cable box ----try an optical cable.

But it sounds like you have a cable ground problem, might even be intermittant with the high AC load due to Air Conditioning etc.

Build yourself a "magic" to lift the ground on your incoming cable with $10 in parts from radio shack.
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