PharmRock wrote:
Not sure about the SS vs tube rectifier as far as overall output goes. My experience with a tube rectifier is that it affects the responsiveness of the amp, not so much the overall volume.
I am far from an expert on the topic, but a few years ago around the time Marshall brought back their hand-wired series, I was led to believe that the main power difference between their 18 watt 1974 model and their similar 20 watt model was simply the SS rectifier in the 20 watter. Can't recall what those were called. Lead/Bass or something along those lines. Too lazy to Google, but everyone has seen the little 20 watt Marshall that is very similar to the 1974.
My take from that is that a SS rectifier doesn't do that much, given the same tubes and transformers. Maybe they went SS for less sag, maybe it was a cost thing, who knows!
But no matter how you slice it, an 18 watt Marshall style amp is plenty loud for most modern applications (i.e. you have the option of mic'ing the cab for larger shows). If you're playing a big outdoor show with no PA for the guitar, then that's a different story.