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by romdev 2499 days ago
In my Toyota, a wired connection from a phone's headphone out to the car stereo aux-in sounds terrible. The amplifier in the phone just can't send a loud enough signal to compete with the noise. Even a lossy Bluetooth connection from the phone to the car stereo sounds better in this case because it's not dependent on the phone's tiny amplifier to drive 6 speakers. The Bluetooth audio quality is almost indistinguishable from the high bit-rate MP3s stored on a USB drive.