I just bought a L3T to use as a variax dream rig a few days ago, I thought it sounded good but not great. then I found out I had an old firmware version on it 1.03, then, I found out that I had to have M20d in order to update the firmware. I did not see any of them in stock at any of the guitar centers within hundreds of miles of me. My plan was to ask if they would let me bring the speaker in and get the firmware updated so that I don't have to spend $2000 on a piece of equipment that I don't need.
I went to my local guitar Center yesterday to check out a guitar that they had in stock, while I was there I let them know that I wasn't happy about the speaker and that they would most likely be getting it back. One of the sales people there did some looking around and found one that showed in stock but no one knew where it was. the m20d box had accidentally been put inside of a Roland shipping box, long story short, they sold me the brand-new m20d for 1500.00 instead of 1900.
They let me know that I can return it without any penalty, keep it, or sell it on craigslist or eBay. So I thought maybe somebody on craigslist would like a good deal so I posted it there, if no one shows any interest in a day or two I'll just take it back to guitar center.
I did the firmware upgrade and now the l3t sounds absolutely incredible! If you're still on the old firmware version with these speakers I encourage you to update it anyway you can the difference is astounding!