MSA 30X Sound Amplifier - Version 1.0 The MSA 30X is the latest challenger to enter the portable sound amplification community. This revolutionary listening device is a step above the competitors for many reasons- not to mention its extremely inexpensive price tag. Its rechargeable design in itself allows consumers to avoid wasting a whole bunch of money every year in battery expenses. The MSA 30X is the embodiment of portability, comfort as well as concealment. As well, for a short period, an MSA 30X online purchase is accompanied with several great bonuses along with an extra sound amplifier.