In [this interview](http://www.guitarplayer.com/artists/1013/robin-trowers-moody-blues/23663) with Guitar Player, Robin Trower said "On this record I am using the 50-watt Vintage Modern combo. I had been using the 100-watt version live, but I switched to the 50s because sound more musical, a bit sweeter."more
This marshall amplifier has a beautiful sound, the one i have is my dads. this is my second favorite amp i have (and i have a good few amps). This really is a beautiful amp overall.
The sound of this amp is special. It is not for metal and it is not quite for blues but it is to create new music with a lot of colors to let your dreams become true. I usually modify my amps but this one I didn't much. Just basic. All my amps I wire in the way to get read of parasitic HF oscillations. CT of high voltage supply I wire to chasy and than I take minus from the other point of chasy which is used as a choke to suppress high parasitic frequencies. The cathodes of output tubes I wire strait to chasy to get softer and more playable sound. I recommend this amp as one in collection.