[chrisr]

Are S-1s magnetically shielded?  Either way, are there any concerns with placing them directly next to my iMac - impact to screen, hard drive or other components?

-cr

[rustydoglim]

It's not 'magnetically shielded', but it's designed to have no magnetic leaks.
Some driver designs are inherently shielded. These typically either use small neodymium magnets totally encased within the motor, or use double or triple magnet structures for other reasons.
See http://ldsg.snippets.org/motors.php for the theory

[Toka]

I have my S-1 less than a foot away from my iMac on both sides, and have had no problems at all...just great sound!