I was looking for an upgrade from the Mackie VLZ. On a very limited musicians budget. Heard some good(old) reviews about the M80 with "Jensens". And here we go- A few years ago I had purchased a PreSonus M80 from "Musicians Friend". I have never been very happy with the sound, seems thin and not enough gain. Just recently, I was looking for ways to tweak the unit and I found an interesting web page about the transformers- http://www.imjohn.com/PresonusJensenXfrmrs/ Firstly, TO THIS DAY the M80 is being advertised as having "Jensen transformers"!!! Which it has NOT, since 2000!!! They have been using some generic transformer since 2000. You can have a look at musicians friend (unless they changed it since I've been complaining!?!?) link- (Dead Link Removed) AS OF 9 AM 1/28 THE "MUSICIANS FRIEND" HAS FIXED THE SITE!!! THIS LINK IS NO LONGER VALID, ADD WENT ON FOR 6 YEARS, HELPING TO SELL WHO KNOWS HOW MANY UNITS!! PLEASE SEE PAGE 2 Notice the "Featuring Jensen Transformers". I can't believe that the "Musicians Friend" won't take my PreSonus back on an exchange. They have been fraudulently advertising this product for 6 years now!!! I contacted Presonus and got some very nice "NO" person who said "Oh.... they shouldn't be saying that.... we told them a long time ago". I then asked if he could take the unit back, to which he said "it's not our fault!" "the unit sounds good to me!!!" OH, reeeeeeaallyyy!!!! I'm totally pissed off and I will never buy anything from this Presonus company again!!! I think that "Musicians Friend" is totally impersonal in their customer support and is misleading the public. I may never buy from them again either. All they said was "Oh, sorry, it's been over 45 days!!!". Never any thought about faulty advertising and ripping off musicians!!! So this is a warning! Just because something is advertised as being a certain product. You cannot trust these big companies like "Musicians Friend". They don't care! They'll jerk you around and leave you out to dry. There must be some legal means to get them to take this thing back? Any ideas? And PreSonus! Thanks for NOTHING!