Sandberg Sound Boost 4.1 is a brilliant sound card with 4 channels surround sound. With 2 stereo output terminals to the front and the back speakers and the advanced  surround function, every sound has a direction. For instance, with this system you can hear the enemy creeping up from behind, or an aeroplane suddenly approaching from the north-east. The card may also be used as an ordinary sound card for 2 loud speakers.  This is in fact excellent value for money.