Help with rear fill amp

[LittleJoe 10+ year member]

Plans have changed and I am looking to decide between two ARC amps. I am going to run a ARC KS300.4 bridged to Hertz HSK164.5 components.

I am having trouble deciding which ARC amp to chose to power my Hertz High Energy coaxials in the rear. Either the KS300.2(180 watts per channel) or the XXD2080.

The reason why I am choosing between 2 amps with such power variations is because I am not sure what power is necessary and what power is over kill. The KS300.2 i well within the power range of the Hertz HCx but not sure if it would sound right with the front components.

I am not going to be running a sub at first or even at all after I have the system installed and am able to hear it. My thinking is if I have more power to the coaxials then they will produce more bass and the speakers are low on the panel leading me to believe the more power the better for the rear passengers to hear the music more.

I can always turn down the gain to coaxials if it is too much but at the same time is it worth $150 to go with the KS over the XD?

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[Kangaroux 5,000+ posts]

Why not just get a 4ch amp?

 

[LittleJoe 10+ year member]

Well I am using the 4 channel amp bridged to the front components. Another 4 channel amp for the rear speakers will just be wasted money and power.

One 4 channel ARC amp is not enough power for those speakers in my opinion. The ARC KS300.4 is only 90 x 4.