Marshall's DSL20HR is an all-tube, twin-channel workhorse capable of conjuring any classic Marshall sound — past or present. Three ECC83s in the preamp section (in concert with the amp's gain/master volume arrangement) give you stunning tone-shaping mojo, and with two EL34s in the engine room, you have enough volume to rule smaller bars and clubs. Marshall has gone on to fit this little beast with critical upgrades that give you even more control over your sound. A Resonance control (as opposed to the original's fixed deep switch) lets you dial in your preferred amount of low-end girth. You also get studio-grade digital reverb (instead of spring), high and low power settings, and a rear-panel series effects loop. Marshall has even included a 2-way footswitch for channel switching and the FX loop.