Not all smartphone speakers are created equal. Last year, we were blown away by a prototype NXP audio chip that boosted volume (but not distortion) through the use of feedback circuitry. The chip monitored a speaker's behavior in real-time so that it could be pushed to the limit without creating crummy sound or being physically torn apart. Others were impressed too: Motorola has since used the nine-volt TFA9890 in the Moto X and the Droid Ultra. These phones have single speakers, but are almost able to match the volume and sound quality of a good stereo system, such as HTC's BoomSound audio in the One family of smartphones (which rely on two five-volt NXP-controlled speakers). So, what comes next? That'd be the second-gen TFA9895, which makes some gentle but noticeable improvements, and which should start arriving in high-end smartphones by the time we get to Mobile World Congress next year. Fortunately, we don't have to wait that long to hear it, because NXP just invited us to an exclusive ears-on.