Hi Trollol,

Welcome to Beoworld!  Yes, you can use a Beolab 3500 speaker with any non-B&O device that has a headphone socket.

There are two versions of Beolab 3500 speaker, each version needs a different cable.  This link explains how to check which version you have:-

how i can turn off the stand by mode? i mean , how i turn it on?

Hi Trollol,

When using Beolab 3500 with a non-B&O music player, a B&O remote (either Beo4 or Beolink 1000) is needed to set the speaker to MCL mode (Beolab 3500 mk.1/LCS9000) or Powerlink mode (Beolab 3500 mk.2) each time it is switched on. First, please set the speaker to standby mode using the "red dot" button on the remote and unplug the Masterlink cable from the speaker (if fitted).

For Beolab 3500 mk/1 or LCS9000, please press MENU 0 4 GO on a Beo4 or MENU 0 4 PLAY on a Beolink 1000, or for Beolab 3500 mk.2 please press MENU MENU 0 4 GO on a Beo4 or MENU MENU 0 4 PLAY on a Beolink 1000 (please ensure that the "GO" or "PLAY" button is only pressed briefly).  Volume control is then managed from the connected device (eg. TV, iPod, etc).  To turn off the speaker, press the “Power Off” button on the remote as usual.

Kind regards, Steve.

hello. finally i made it turn on ... but works only a speaker(left side) , ... i have a cable from din5 to 2xrca ...and from rca i have a cable rca -jack.... i dont know were is the problem now

Hi Trollol,

You need a specially wired cable to make this speaker work.  Normal DIN cables aren't suitable.  Please use the link in my first reply at the start of this thread to check which version of speaker you have, then you can select the correct cable from that link to get the speaker working correctly.

Kind regards, Steve.