ZX 350.4 or ZX 650.4 powering Polk Audio db525 Speakers

[GTSLVR4 10+ year member]

As title says, which amp would be best to get the most power out of my speakers. I have front and back Polk Audio DB525 5 1/4'' speakers, their 45 watts rms and 135w peak. I'm looking to push them at the most power possible thats safe. Should I get a ZX 350.4 amp or a ZX 650.4 amp?? Thanks!

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[UCF52 10+ year member]

The ZX350.4 should be fine. Remember the Kicker amps are a bit underrated, so I would guess that the birth sheet for a 350.4 is somewhere around 400w.

If you do plan on upgrading somewhere down the road the ZX650.4 might be a better choice.