Digital Mega Bass sound system with 3 position switch. It wasn't until 5 years later, in fact, that the MiniDisc managed to surpass audio cassette sales. Sales did not really take off until Sony decided to target college students by hosting music festivals to promote the product. The MiniDiscs advantages are that it has the sound quality of a normal compact disc, with the capability of skipping from song to song, yet it is smaller and more durable than a cassette tape. The most notable concern of the MiniDisc right off the bat is the price.
Life expectancy is the other problem at hand.
Some believe that as it took a few years to catch on in the first place, it is just a phase that will only last a couple of years. Besides you cannot just go into Sam Goody and buy all of your favorite artists on MiniDisc. The legal concern with the MiniDisc is with the copyright laws. Record labels and artists are upset at quality of the album reproductions that can be made with the MiniDisc in violation to the copyright laws.