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Are swichboxes supposed to have some degree of channel crosstalk?

post #1 of 15
6/16/11 at 6:21pm
Thread Starter 

I can faintly hear other sources from another channel if amp volume is turned up.  Anybody own a switchbox, does yours have crosstalk between channels? I have the Decware RSB6 switchbox.


Edited by flargosa - 6/16/11 at 6:26pm
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post #2 of 15
6/16/11 at 11:09pm

 

It's not uncommon to get some capacitive coupling between adjacent switch contacts which can result in crosstalk.

 

Have you tried staggering the inputs, i.e. 1, 3 and 5 instead of 1, 2 and 3? Sometimes the additional separation can reduce the crosstalk.

 

se

 

 

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post #3 of 15
6/17/11 at 9:03am
Thread Starter 

Yes, I have tried staggering it, no improvement.  Is the crosstalk a result of the switch itself, or the sharing of negative wires across all RCA input plugs?  

 

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post #4 of 15
6/19/11 at 6:07pm
Quote:
Originally Posted by flargosa View Post

Yes, I have tried staggering it, no improvement.  Is the crosstalk a result of the switch itself, or the sharing of negative wires across all RCA input plugs?  

 


Oh? I would've though everyone switches the grounds as well. More effort, but that way you can guarantee no sharing of anything, and if the rotary switch was half decent crosstalk would be at a minimum or non-existent.
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post #5 of 15
6/19/11 at 7:58pm
Thread Starter 

The switch designs I saw online have shared negative wires, much like my switch below. 

 

 

DSC04821.JPG

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post #6 of 15
6/19/11 at 8:55pm
I know it's rude for me to ask, but how much did you pay for that Decware?

Most people do not switch grounds because the price climbs rather quickly since your switch will need more gangs (four, two for signal, and two for ground).

Brendan
Edited by cyberspyder - 6/19/11 at 9:00pm
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post #7 of 15
6/20/11 at 8:04am
Thread Starter 

Got it for over $100, I will be returning it and making my own pluggable cables instead.  The thought of crosstalk just bothers me.  

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post #8 of 15
6/20/11 at 12:47pm
It's just a lack of design, they took the lazy way out to increase profits.
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post #9 of 15
6/20/11 at 3:50pm
Quote:
Originally Posted by cyberspyder View Post

Most people do not switch grounds because the price climbs rather quickly since your switch will need more gangs (four, two for signal, and two for ground).
 


And some avoid doing it not because of price, but because it can result in popping when you switch sources.

 

se

 

 

 

 

 

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post #10 of 15
6/20/11 at 4:02pm
That's because the wrong type of switch was used. Shorting always (break before make).

Edit: In addition it is always good practice to avoid hot switching each to their own however.
Edited by cyberspyder - 6/20/11 at 4:09pm
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post #11 of 15
6/20/11 at 4:58pm
Quote:
Originally Posted by cyberspyder View Post

That's because the wrong type of switch was used. Shorting always (break before make).
 

 

You get popping with break before make when you switch grounds. And you don't want make before break because you can have the output of one component driving the output of another which can destroy equipment.

 

se

 

 

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post #12 of 15
6/20/11 at 5:09pm

You could use an active input selection circuit with relays.  That should alleviate your issues.  AMB has one.  I think Twisted Pair does, too.  Of course you'll have to put it in your own chassis and do the solder work.

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post #13 of 15
6/20/11 at 6:23pm

Hmmm...I will check my SkipJack this evening.

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post #14 of 15
6/20/11 at 7:53pm
I haven't had that happen to me but I have resistors hooked up. Whether or not that helps is another story, this is a known shortcoming of analog rotary switches compared to electrical relays.
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post #15 of 15
6/20/11 at 10:29pm
Quote:
Originally Posted by cyberspyder View Post

I haven't had that happen to me but I have resistors hooked up. Whether or not that helps is another story, this is a known shortcoming of analog rotary switches compared to electrical relays.



You can use the rotary switch to control the latched relays. :)  Then you get the best of both worlds.

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