Worth the upgrade
2007 Hyundai Sonata
Replaced all 4 stock aging door speakers with these bad boys and they work great with my old Kenwood receiver. Sound quality is typical of Polk Audio speakers, well balanced mid/hi. Also installed the Sound Ordinance powered sub under the driver seat to take care of the lows and the result? Speakers work in beautiful harmony and they don't drown each other out. Sound is amazing for what I spent on this upgrade. Clear and crisp sound with just enough punch without annoying other cars at a traffic stop. If you're in the market for speakers, consider the Polk Audio db651s but manage your expectations appropriately as they will NOT satisfy your bass craving. That's what a powered sub woofer is for.
Pros: Solid build and design like any other Polk Audio products. Clear, crisp sound
Cons: Spacers Crutchfield sent did not fit in either of the door speaker holes. Had to trim each spacer to make them fit which made my install time a lot longer