Summary: First off, let me say that I NEVER write reviews for anything I buy, but feel compelled to write one for this product to warn others. I've purchased Altec Lansing speakers before and have even recommended them to friends and never have I heard or had any problems. That is, until I bought these.
Summary: In exactly 12.5 months (just out of warranty)the system began to fail. I use it with an IBM Thinkpad and I have an earlier Altec Lansing ACS 340 which continues to work fine. I called Altec's tech support 1-800-258-3288 and was told that even though the system was out of warranty they would fix it.
Summary: I have a MSEE (Master's in Electrical Eng) - this sound system is flawed from the ground up - there is a substantial 60 Hz hum that will not go away no matter what volume level or wiring configuration you use.
Summary: I researched these speakers EXTENSIVELY before purchasing them. As is the case here, the vast majority of the user reviews on the various online merchant web sites are all extremely positive. The professional reviews, however, are more accurate.