Head-Fi: Covering Headphones, Earphones and Portable Audio  
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Old 01-25-2006, 11:08 PM
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Default headphone splitter as dual input

Hey.

I have a some headphones connected to a cmoy amp. I'd like to have both of my computers connected to the amp's single input so that I do not have to swap cables when I switch computers. Could I use a headphone splitter for this?



I gather these are usually used to clone an ouput rather than receive 2 inputs. The computers would not be playing sound at the same time (what would happen if they did?)

TIA
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Old 01-26-2006, 12:35 AM
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I've tried that and it never works for me. M-Audio Revolution 5.1 line-in and mic; they only accept input from one, not both, and I believe it's only the same one.
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Old 01-26-2006, 01:53 AM
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Quote:
Originally Posted by wush
I have a some headphones connected to a cmoy amp. I'd like to have both of my computers connected to the amp's single input so that I do not have to swap cables when I switch computers. Could I use a headphone splitter for this?
You need three male plugs for that, if I'm not misunderstanding the question.

Quote:
I gather these are usually used to clone an ouput rather than receive 2 inputs. The computers would not be playing sound at the same time (what would happen if they did?)
I'm rusty on electricity, but I think that whichever system is putting out the greater voltage at any instant is going to be dumping part of the signal into the other system. I looked into connecting a stereo source to a mono amplifier and found that I would need a resistor on each line before they are connected. Presumably four resistors could make your idea safe.
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Old 01-26-2006, 02:24 AM
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Quote:
I have a some headphones connected to a cmoy amp. I'd like to have both of my computers connected to the amp's single input so that I do not have to swap cables when I switch computers. Could I use a headphone splitter for this
why would you not use a simple A/B switch or even el cheapo input selector ? The "Y" adapter seems to be the worst solution

Quote:
I'm rusty on electricity, but I think that whichever system is putting out the greater voltage at any instant is going to be dumping part of the signal into the other system.
series resistance on each computer output would prevent the two from "fighting" and in effect make this a kind of passive mixer but using a straight "Y" cable is not a real good idea and if you go to the trouble to make a resistor box better to just make a A/B input selector since that is really the best solution

Mini box.DPDT Switch,Jacks...DONE ! About $10 total
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Old 01-26-2006, 02:42 AM
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I just tried it with this adapter:



and it worked fine. I had it plugged into the input of my pocket amp, with my computer and my iPod plugged into it. Either source worked fine, and if you play them both at once they just mix together. Also if you have it plugged into an amp and you plug the source into one of the plugs (on the adapter) and your headphones into the other plug on the adapter it just acts as a pass through, cutting out the amp entirely!
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