You dont have enough gear to have a "proper/correct" setup...
1 - Art Phantom II - is NOT A PREAMP - all that does is power the mics (turns them "on") - You need a preamp to record.
2 - You CAN hook the mics up directly to the recorder - but - unless you are recording Metallica from 20 ft away - you will not get anywhere near enough gain to make that setup work - HOWEVER - you can - at least - test your gear this way...
To do so:
2 of these:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=274-0162 of these:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=274-9092 of these:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=274-1553and 1 of these:
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=42-2550Connect the mics to the ART Phantom Box via your balanced XLR cables.
Connect the RS Impedence adapters to the outputs of the ART Phantom box.
Connect the 1/4 > RCA to the impedence adapters
Connect the 1/4 > RCA to the RCA > RCA connector
Connect the 1/8 inch > Stereo RCA to the RCA > RCA Connectors
Plug the 1/8 inch > Stereo RCA to the JB3
Turn on the JB3.
Select "Record Audio"
Scroll to "Source" and select "Line In"
Scroll to "Monitor Recording" and select "44.1"
At this point - make some noise - you should see some activity on the JB3 meters...you may need to select "Gain" on the JB3 and bump it up to +12db.
Press the "Rec" button
NOTE: You can use a set of XLR cables between the Art Phantom output and the RS Impedence adapters if you are uncomfortable with them attached to the box.
NOTE 2: This is just one "adapter string" that does the job - there are many variations...YMMV