Computer Speakers in Addition to the Flex

WG5D

I've never even plugged any speakers into my Flex - I always use the PC speakers or a headset plugged into the computer.

Mark_WS7M

This is the mixer I use.  I talked to Art Pro and this has ground loop isolation built in.

It fits nicely under the monitor and has plenty of space to expand.  FRS audio sounds great and I can mix in the level I want with the PC audio. 

http://artproaudio.com/mixers/product/mx822/

I drive this into these bose speakers:

http://www.ebay.com/itm/Bose-MusicMonitor-desktop-speakers-Mdl-302481-001-Silver-w-Remote-Great-Soun...

Rick N4RZ

I have the ComSPKR and it works very well.  The cost is $38 from R&L Electronics.

WK2Y

What does the isolation transformer help with  AC hum, RFI, all the above?

David-N5PSM

Ground loops between the speakers and the flex cause issues. A good ground isolator off amazon works fine

 (PAC SNI-1/3.5 3.5-mm Ground Loop Noise Isolator Works with iPod/Zune/iRiver and Others)

N0AZZ

I have used a set of these3 for 3 yrs. or so on my Elecraft K3's and found them to be as good as external speakers from Yaesu and Icom of better than the $300+ sets for them.