Cars Q&A

Dear Sir, I own a Maruti Swift 2008 model and had installed with Dzire Factory ICU.I have reacently upgraded my audio with Pioneer 6*9 speakers and Tweeters along with Stock speakers on the doors. I have few questions regarding my ICU setup i would really appriciate if someone responds... 1).Is there any impact on power loss since i have connected 8 speakers to my basic ICU w.r.t other electricals/electronics. 2).Is there any impact on the Battery and wiring... 3).Any consequenes with the installation of 8 speakers powered by HU.. Thanks in advance for your replies... Best Regards Raman