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Yiangos
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Last seen: 2 years 10 months ago
Joined: Sep 7 2005 - 8:41am
This is driving me crazy !!!!

Due to room rstrictions,i am forced to combine "home theater" with "hi-fi".Fortunately,my pre-amp (Jeff Rowland Synergy ii" has pass-through facility.My HT amp is a Denon AVC-A1xv(i believe the equivalent US model is the AVR-5805)
Whenever i press the pass-through switch on the "synergy",i get a high-pitched noise much like the one we get when connecting rca plugs on an amp without muting it.I tried everything!Changed the xlr adaptors (the sysnergu is only balanced) from normal ones to cardas,to Jeff Rowland and B.A.T.s but nothing.The problem still there.I even took 4 interconnects and made 2 longer ones using female-to-female adaptors.Now,something happened.I still get the noise but now it happens after a few seconds and only when i turn off the Denon.As long as the Denon is on,everything is okay. When i turn it off,after about 5-7 seconds,the noise begins.
It feels to me like a "grounding" problem but can't be sure.
Can anyone help ?

59mga
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Joined: Jun 21 2006 - 6:52am
Re: This is driving me crazy !!!!

Yiangos,

I had a similar noise problem when connecting balanced and unbalanced equipment. The 2 pieces of equipment were plugged into different electrical outlets and I suspected a grounding problem so I used a power strip and plugged both the pre-amp and power amp into the the same power source.
Problem solved.

I would venture a guess and say that when you turn off the Denon you are loosing ground. Good luck and keep us posted.

Mike

Yiangos
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Re: This is driving me crazy !!!!

Thanks Mike

I understand what you're saying but it would be a bit difficult to connect the Denon and both the pre and power amp through a power strip.I have the pre connected on a Isotek substation but i will give it a try.Who knows !

cyclebrain
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Re: This is driving me crazy !!!!

Not sure what you mean by "high pitched noise". Do you mean a high frequency noise or a high level (loud) 60 cycle noise? What output connector on your HT system are you connecting to? Hopefully it's a preamp out and not a fixed line level output.

Yiangos
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Last seen: 2 years 10 months ago
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Re: This is driving me crazy !!!!

I really can't explain the type of noise.The only other instance i've heard such a noise is when you try connecting a source component to an amp without muting it but not that much loud.It's a "pre-amp" pot okay

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