Two pc's and one speaker system.

nickg5 used Ask the Experts™
I have a KVM switch for the monitor, keyboard and mouse and it also has audio connections. The two audio wires from the switch have the green connectors, one to each system.

My speakers have another wire which is a USB power cord.

The KVM solves the two green speaker wires.
How to solve the need to connect the USB power cord (speaker power cord) ?

What amount of power is feeding the speakers from the pc?
Small current such that a Y connector could be used?
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Principal Software Engineer
You could use a power-only USB Y cable, but I DO NOT recommend that.  If one system is turned off, the one that is turned on attempts to back-feed the turned-off system's 5V bus through the USB Y cable.  This could cause all sorts of issues.

Better solution is to buy a cheap USB wall wart power supply (costs about a buck on fleabay), and power the speakers off that.
Most Valuable Expert 2015
Just connect the USB power to one of a PC's USB ports. As long as the PC is powered on the speaker will have power. Some PC's will even keep on powering the USB ports even if the PC itself is off.
The speaker power cable to the pc that was not turned on did not work.

A USB wall port would leave the power on 24/7 for the speaker which may not be any issue. There is a power on button on the front of the speaker. Since the printer stays on 24/7 the speaker doing the same should not be an issue.

How many volts are feeding the speaker? The ones on that Ebay link are for cell phones, etc. The power to the pc's is 110 volts.
Dr. KlahnPrincipal Software Engineer
Since the speakers are powered from USB, by definition the power is USB, 5 volts, no more than 500 mA.
What are the comments about the above item working for us?
On my Aten DVI KVMP switch I have 2 towers connected to the one monitor and mouse keyboard
 I plug the single mono audio cable "green" from my PC onto the switch
The KVMP switch has it's own audio cable/s that inturn plug from the KVMP to the 2 PC's audio on the rear of the tower/s

My Logitech speakers have great sound and include front sockets for mic and headphones they use AC power.
 You really need to  consider to change those speakers from USB power to AC or else you cant use them with your KVM switch, it's too hard to find workarounds.
Logitech X-140 2.0 Speakers on Amazon as I am in Australia
Feedback on the speakers I have

but even a cheap pair from a good brand do great as the real sound comes from the media player and the size of the magnets in the speakers inside the box, look around on the internet, even on Amazon there is a pair for 29 dollars and Logitech is a good brand. These even have a very good rating. It depends on your needs for sound.
Read the feedback.
Logitech Multimedia Speakers Z200 with Stereo Sound for Multiple Devices, Black
The speakers power cord is USB and our newly bought KVM does not accept > in > USB. The only speaker connections on the switch are the green plugs in and out.

It seems that if the power cord from the 110 volt wall outlets to both systems will give power to one of the USB ports or the other for the speaker power cord.
And the 110 volts plugged in to the system 24/7 is not any problem at all even if the pc's are only used 5 hours a day.
ordered a wall adapter for $1.55 and free shipping. Also speakers USB power cord into either pc.

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