[SOLVED] S-DJ05 + Cell phone interference....

No, the cell phone won't do any damage to your speakers.

Thank you :)

You're welcome!

That kind of interference acceptance is, unfortunately, required by the FCC and most other similar international organizations.  The cell phone puts out a particular signal that is picked-up when in proximity to any audio amplification circuit - you could hear the same thing in a clock radio or car stereo.  It seems to happen most often when the phone is transmitting on certain frequencies (I find typically when my phone falls out of 3G signal range it hapens).