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250 posts

Master Geek
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Topic # 233444 16-Apr-2018 15:15
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We have a marantz amplifier and wharfdale speakers - bought them new about 8 years ago? and we have our TV / Sky / DVD player all running through the amp / speakers

 

about 3 months ago I turned the TV / amp on one morning and got a fright when the speakers started crackling like loud popcorn or very loud static.... since then it's done it every day when we first turn the amp on for about 10 seconds, then it stops and normal TV sound resumes from the speakers.... but the last 2 days the crackling has got louder and lasts for about 20 seconds.

 

does anyone know what the issue / problem might be? - as it was working fine up until about 3 months ago - and we've not changed any settings / cables.

 

I cannot check the TV by itself as it is all going through the amp (turning TV volume up / down does nothing)

 

 

 

any advice would be appreciated


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2427 posts

Uber Geek
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  Reply # 1997156 16-Apr-2018 15:17
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Check for individual speakers. And isolate any connected devices OFF it for a test to pinpoint if its the onboard circuitry. Raw voltage through a coil will do that. But so can another appliance doing bad ground loops


343 posts

Ultimate Geek
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  Reply # 1997174 16-Apr-2018 15:56
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is the popping sound in a rhythm? 

 

if you leave the amp on and remove other devices does it speed up or slow down

 

 


 
 
 
 


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250 posts

Master Geek
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  Reply # 1997176 16-Apr-2018 15:58
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hsvhel:

 

is the popping sound in a rhythm? 

 

if you leave the amp on and remove other devices does it speed up or slow down

 

 

 

 

 

 

we turn the TV on and the amp on - the TV comes on first then after 4-5 seconds the loud crackling starts for 10-20 seconds than stops

 

it's just random crackling, no rhythm or tune or anything


Banana?
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  Reply # 1997179 16-Apr-2018 16:02
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If you unplug all the inputs from the Amp, does it still do it when you turn it on?

 

How is the TV connected to the amp?


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Ultimate Geek
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  Reply # 1997180 16-Apr-2018 16:07
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remove everything from the Amp and test for it, then add them back one by one.

 

Tedious but you'll need to check




250 posts

Master Geek
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  Reply # 1997246 16-Apr-2018 19:16
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trig42:

 

If you unplug all the inputs from the Amp, does it still do it when you turn it on?

 

How is the TV connected to the amp?

 

 

 

 

HDMI cables I believe... wifes Friends partner (who does home audio / security systems for a job) set it all up with everything going to the Amp via HDMI cables... we've had no issues for 4 years until now


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  Reply # 1997316 16-Apr-2018 21:20
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Wifes friends partner sounds like a good person to ask about this problem then. They'll probably have cables and speakers to swap out during a testing phase and will probably get to the crux of the problem quite rapidly.




250 posts

Master Geek
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  Reply # 1999940 20-Apr-2018 17:38
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ok so this morning I took video footage with my phone - lasts for a minute and has gotten worse frown

 

I'll ask friends husband if he can look at it, but see what you guys make of it?

 

https://youtu.be/8YWh8Gi-dnw


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