We haven't had a chance to fully test this product yet, but we've assembled this helpful overview of relevant information on it.
The Magnavox MSB5305 is an expandable soundbar with a subwoofer, capable of projecting a total of 80W of power. Additional features include SRS TruSurround HD sound enhancement and a total speaker frequency range of 50 – 20,000 Hz.
80W Total Power
SRS TruSurround HD Sound Enhancement