You probably thought that the proliferation of high-end car audio brands partnering with OEMs, and the expansion of tablet-like screens with smartphone integration into cars, would be the end of DIY stereo upgrades. You would, evidently, be wrong. A growing group of Kia EV6 owners are finding that they need to do some handiwork of their own to get the most out of the 14-speaker Meridian sound systems that came from the factory.
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