3.5mm 5.1 Surround Sound Switch/Splitter Box for 2 inputs

Hello, my first post here, so it might be in the wrong section, please move it if necessary.

I have quite a complicated problem.

Currently I have 1 PC with 5.1 speakers and recently bought a 5.1 headset with microphone. Already  I have a problem when I want to switch between speakers and headphones, each time I have to go under the desk and change the cables :/

In a few months I plan to buy another computer (old one is used up, but it is still quite good equipment). And here begins the stairs.

I do not need a second monitor or keyboard plus a mouse, so I want to buy a KVM (keyboard / video/ mouse) switch. The mouse and keyboard are USB ones, so the KVM must support USB. Monitor and graphics card are connected through DVI, which I want to keep, so I must have a DVI KVM. I also want to be able to switch between headphones and speakers.

So I thought about this: cs1782

But this works only for one 'source': I could use either speakers or headphones, switching from one PC.

But I would like to be able to choose whether I want to use speakers or headphones on both of the PC, so I was thinking about doing (I have not found anything like this to buy, which is strange, because more and more people have the same problem) something like this.

But as to be able to do:

- Switch between headphones and speakers at PC1
- Switch between headphones and speakers at PC2
- Switch between PC1 and PC2
- Using headphones on PC1 and
speakers on PC2 (or vice versa) simultaneously.

I've came out with this picture, which should  be able to do this:
- Switch between headphones and speakers at PC1
- Switch between headphones and speakers at PC2
- Switch between PC1 and PC2

But I still can't figure how to make this:
- Using headphones on PC1 and speakers on PC2 (or vice versa) simultaneously.

The more I  think about it, the more I get the idea that it can't be done via DPDT switches, but I don't know what to use.
Is it even doable? I have no experience in electronics (I did solder couple of wires in my life, but nothing more), but I have a lot of enthusiasm, so I could make such magic boxes, if I knew how.

Thanks in advance for any suggestions, ideas, etc. I also hope that this problem will be useful to someone else.


Picture of 3.5mm 5.1 Surround Sound Switch/Splitter Box for 2 inputs

You will need to change the DPDT switches in your diagram to the center off type (ON-OFF-ON) rather than (ON-ON). Then you will need to add another layer of DPDT center off type switches (ON-OFF-ON) to select between speakers or headphones for each PC. When switching between what you proposed in your diagram and what I have added, all switches need to be placed in their center OFF position.

NachoMahma7 years ago
.  Holy Mackerel, Sapphire!
.  As you've figured out, it's your last requirement that is tripping you up, and that's going to take something that can look pretty complicated.
.  I'm having a hard time telling for sure if your diagram will work or not, but it's in the ballpark. The more I look at it the better it looks.
.  Tying all your grounds together may cause ground loop problems.
.  Use shielded cable everywhere.