The Marshall DSL100HR 100W tube guitar amp head delivers the iconic DSL tone that's driven rock and metal for decades, and adds modern features, including dual volume controls, an emulated output and built-in reverb. These DSL amps are laden with Marshall tone, features and functionality for the novice, as well as pros performing on the world’s biggest stages. The DSL series includes the following new features:Adjustable Power OutputThese DSL models feature adjustable power settings, which delivers all-valve tone and feel, at any volume, from bedroom to stage. The new technology adjusts power to the valves, instead of just turning off valve stages, allowing the amp to remain articulate and dynamic.EQ RefinementsSome innovative tweaks to the EQ circuitry have given the new DSLs even greater tonal flexibility. The EQ section of the new DSLs can deliver exactly what ears are looking for.Emulated OutputMarshall's partnership with Softube has led to the creation of award-winning plug-ins, as well as exceptional tone in its CODE digital amps. The same team is responsible for the development of the new emulated output feature, found in the DSL series. Both the headphone out, and line out on the DSL models boast incredibly accurate emulation of Marshall's famed 1960 cabinet.Reverb, Resonance and Master VolumeThe DSL is now more versatile than ever, with new features including discrete master volume controls for each channel, built-in reverb and resonance controls (the DSL1 and DSL5 do not offer resonance controls).