[akhter]

I have a 2010 325i with base stereo (not harman kardon or Hifi) and idrive+hifi professional.

This is not a US spec car.

I believe this means I have 5 speakers (4 midrange/tweeters) and one sub under driver's seat and a built-in 4-ch amp.

I want to upgrade the amp (or add some) and all speakers/subs.

1) Does anyone know if its easy to get a line out?

2) All threads seem to be about upgrading HiFi loudspeaker or H/K surrond sound which are offered in NA cars. any pointers on upgrading this base system?