The EM-Blue is equipped with a “Nickel” custom wound output transformer. This translates into “Highs” which will produce a much more airy top-end-ish tone.
Used with a “dark” sounding microphone or a alto vocalist it can produce a “heavenly” sound. You will also find this pre useful for recording a snare drum for a “crisp crack” sound. And if you use the DI Feature you just might want to hear what an electric guitar sounds like going thru the nickel transformers.
As with all the 500 Series Pres A Designs Audio produces, there is a -20dB PAD Switch. So, to get down and dirty with an electric guitar you will want to pad your input and crank the gain for a slight growl.