I just received these today after a very speedy delivery.  I purchased these as used and described as very good.  Let me tell you...WOW...these are excellent...the condition is like new and no one will ever notice that the are refurbs or used. They arrived in very good packaging...the original Alesis carton within a carton...very well protected. This is such a good buy that I can't believe I got these for the price I paid for them!  I've been using AV40s since 2010 and they died on me.  These feel like they will last a lifetime and I hope they do.  Right now I am driving them with an old Sony STR D615 100w receiver and they sound and respond great.  I will probably purchase another studio quality amp at a later date but for now there is no need.  I can hear my mixes more clearly for the first time and already have made some adjustments to them because of the Monitor Ones!  I was unaware of bad mixes using my old monitors.  These also sound good with all other music devices (cd, radio etc).