Need speaker A/B switch without common (-) connection

sprinter · 20th April 2011, 06:41 AM

I need a speaker selector A/B switch that does not connect the negative speaker sides together as most of them seem to do. I need to be able to A/B two sets of speakers and two Tripath-type amps which do not work if the speaker negative terminals are tied together.

I bought a Dayton source/speaker switch but the (-) teminals are common making it unsuitable for that kind of amp. I'm afraid they may all be like that. Are there any that aren't?

sofaspud · 20th April 2011, 06:51 AM

I made a similar inquiry not long ago. Response was minimal.
I think your best bet may be some good DPDT break-before-make switches.
Unless you can mod that Dayton unit...

sprinter · 20th April 2011, 07:10 AM

Quote:

Originally Posted by sofaspud

I made a similar inquiry not long ago. Response was minimal.
I think your best bet may be some good DPDT break-before-make switches.
Unless you can mod that Dayton unit...

I'm afraid you may be right. There are other selector switches, but there's no way of knowing how they are wired and I'll bet they're all like this to save costs. I don't actually mind building something if I have to. I guess I'll draw something up and look for parts. Haven't been parts shopping for a long time.

Design wise, should I be concerned about transients caused by mechanical switching under power? I'd like to be able to switch on the fly but power would probably not be >10 watts or so. I agree with break before make.

sofaspud · 20th April 2011, 07:27 AM

Lower power probably helps, but personally I'd avoid on the fly switching if possible. If you really want it you'll need to give caution to the amps. I don't know how t-amps respond to being unloaded, even (or especially) briefly. That issue may have been brought up here in the forums at some point. And if power is on break-before-make is not optional I would think.

20th April 2011, 06:41 AM	#1
sprinter diyAudio Member Join Date: Feb 2011 Location: Seattle	Need speaker A/B switch without common (-) connection I need a speaker selector A/B switch that does not connect the negative speaker sides together as most of them seem to do. I need to be able to A/B two sets of speakers and two Tripath-type amps which do not work if the speaker negative terminals are tied together. I bought a Dayton source/speaker switch but the (-) teminals are common making it unsuitable for that kind of amp. I'm afraid they may all be like that. Are there any that aren't? __________________ Shrink to Patient: "Forget the Prozac, you need more Boogie!" There are only two kinds of music. Good and Bad

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20th April 2011, 06:51 AM	#2
sofaspud diyAudio Member Join Date: Nov 2005 Location: San Antonio TX	I made a similar inquiry not long ago. Response was minimal. I think your best bet may be some good DPDT break-before-make switches. Unless you can mod that Dayton unit...

20th April 2011, 07:27 AM	#4
sofaspud diyAudio Member Join Date: Nov 2005 Location: San Antonio TX	Lower power probably helps, but personally I'd avoid on the fly switching if possible. If you really want it you'll need to give caution to the amps. I don't know how t-amps respond to being unloaded, even (or especially) briefly. That issue may have been brought up here in the forums at some point. And if power is on break-before-make is not optional I would think.

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