Installing aftermarket rear speakers

[Christian H]

Cheers Gents

Sam this is the first time I have tried adding extra speakers etc in a car so any advice would be helpful, my Sony head unit has a speaker impedance of 4-8 ohms with a maximum power output of 52 watts x4 at 4 ohms.

The speakers are 150watts peak 20 watts rms and 4 ohms

So do I wire the rear speakers in series or parallel?

Am I right in thinking wiring the speakers in series would lower the impedance too much for my head unit?

Will they work better in parallel?

Help!

I thought this was too easy