Amp suggestions. and questions

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What kind of amp do I need to power infinity kappa 62.7i's?

# 2-way car speakers for 6-1/2" and 6-3/4" locations (pair)

# 2-ohm impedance for extra power (compatible with all factory or aftermarket car stereos)

# rotating UniPivot M.M.D. dome tweeter

# computer-optimized outboard crossover with tweeter level control

# power range: 2-75 watts RMS (225 watts peak power)

# frequency response: 45-25,000 Hz

They are only my rear speakers.

Also I have a dual subwoofer with a kenwood amp already and I was wondering if I would need to do anything special to power two amps.. Is it possible to have another battery to just power the speakers?

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