Express Plus 5:50+ CLEAN
http://www.mesaboogie.com/Product_Info/Express/Express+550.html
This samplfeatures the Express PLUS 5:50 in the Channel 1 Clean mode showcasing the rich, warm and round clean sound potential of the 6L6 power section with it's 5 watt, Single-Ended operation in a traditional jazz format. The 2nd harmonic is allowed to bloom in the Single-Ended, low wattage modes of the Express Plus series and it's tailor made for enhancing any of the modes or sounds where you're not looking for the maximum headroom of the higher wattages.
Played through the Express 5:50 head with a matching Mesa 1x12 Lone Star 23 Extension Cabinet with the neck position humbucker of an Ibanez AF-105. Mic'd with an Shure SM57 and a Sennheiser 421.