I bought them 4 months ago, installed them in a regular kia rio door connector through spacer rings, left for 1 month, felt a lack of bass, low frequencies, decided to soundproof the doors, hoping that the result would be much better. As a result, after the vibration-noise isolation of the doors and door cards, the small rattles emitted by the door itself disappeared, but the basses, as they were liquid and barely audible, remained, although I unscrewed them a little higher in the equalizer.
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