Amp Input: XLR & RCA switching

Devil_H@ck · 28th May 2004, 09:52 PM

I was wondering how I could do XLR/RCA input switching for my amplifier.

I suppose using a simple switch is possible, but I'd like some sort of circuit that leaves the switch out of the signal chain. I've got no problem with an extra opamp though. Is there any way to do such a thing or not?

Devil_H@ck · 29th May 2004, 01:59 PM

No one knows?

* To mods: Sorry, I posted this in the wrong forum. Could it please be moved to the chip amp forum? Thanks!

tiroth · 29th May 2004, 03:01 PM

Just connect them in parallel and use a shorting jumper or switch to connect IN- to ground. Since only the ground connection goes through the switch, I think this is fine.

This is how Pass Labs does it (jumpers).

Devil_H@ck · 29th May 2004, 05:15 PM

I guess I could just as well use tiroth's trick, but I just thought about this and wondered if it would work. Will there be crosstalk between the inputs?

moamps · 29th May 2004, 07:52 PM

Quote:

Originally posted by Devil_H@ck
...... but I just thought about this and wondered if it would work....

Hi,
In your schematic active input is loaded with only 100ohm what is unnecessary low. Also, inactive input is shortened to ground what also isn't good.
Regards

Devil_H@ck · 29th May 2004, 08:54 PM

Ah well, I guess I won't use any switch at all. I guess I'll be smart enough not to connect 2 input signals at once to my amp

.

28th May 2004, 09:52 PM	#1
Devil_H@ck diyAudio Member Join Date: Dec 2003 Location: Belgium	Amp Input: XLR & RCA switching I was wondering how I could do XLR/RCA input switching for my amplifier. I suppose using a simple switch is possible, but I'd like some sort of circuit that leaves the switch out of the signal chain. I've got no problem with an extra opamp though. Is there any way to do such a thing or not? __________________ Website: http://members.lycos.nl/anthonyvh

29th May 2004, 01:59 PM	#2
Devil_H@ck diyAudio Member Join Date: Dec 2003 Location: Belgium	No one knows? * To mods: Sorry, I posted this in the wrong forum. Could it please be moved to the chip amp forum? Thanks! __________________ Website: http://members.lycos.nl/anthonyvh

29th May 2004, 08:54 PM	#6
Devil_H@ck diyAudio Member Join Date: Dec 2003 Location: Belgium	Ah well, I guess I won't use any switch at all. I guess I'll be smart enough not to connect 2 input signals at once to my amp . __________________ Website: http://members.lycos.nl/anthonyvh

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29th May 2004, 03:01 PM	#3
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	Just connect them in parallel and use a shorting jumper or switch to connect IN- to ground. Since only the ground connection goes through the switch, I think this is fine. This is how Pass Labs does it (jumpers).

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