Help! is this normal?

[Timothy2]

Hi all
I really need some help.

I have a Volvo V60 D4 R-design lux (I think), its a 66 plate and I've owned it since it was 6 months old. It was an ex volvo dealers car. It has the premium sound pack fitted harman kardon (Apparently this was a very expensive optional extra )

Now this has never bothered me but ever since I've had the car I've always thought the sound system was very poor, specially as it was supposed to be "upgraded". I played around with the settings and I've found it is impossible to get sound to come out of all 4 speakers (there may actually be more) at the same!

If front speakers are on, the back speakers are off (so no one in the rear can clearly hear the radio). If I turn the back speakers on, the front ones turn off.

Does this sound normal?

I have the sound setting to Surround and the faders are equal, Surely I should get sound coming out of the front and rear speakers?

Does anyone have the premium sound pack on a V60 and does theirs do this?

The dealer said its normal, the car is coming out of warranty shortly so if there is a fault I'd like some ammunition to use to try and get the dealer to fix it.

Thanks All .