The Altec Lansing Series 100 speakers were designed to be relatively low cost but high quality speakers. The speakers came in two different options: either the 120i or the 121i. The difference between the two is that the 120i is a 2.0 speaker setup, meaning there is no subwoofer. The 121i is a 2.1 setup and uses an active subwoofer, which means that it has its own built-in amplifier. Writer Bio
