Impedance Advice

[zaru]

Hi guys

Need some advice pls.

I have a pioneer vsx920 avr running 2 dali concept 8 fronts, a cambridge audio s50 centre and cambridge audio s30 and s20 surrounds.

The dalis have a 6 ohm impedance and all the cambridge has 4-8 ohm.

Firstly how would you guys rate this setup
secondly would using mixing impedance like this cause any damage to the avr.
And thirdly can someone explain the 4-8.

Thanks in advance...

 

[JimGore]

 

[audionote]

 

[alternativeroute]

 

[user 1447]

 

[zaru]

 

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[Ampdog]

 

[zaru]