Graphic Equalizer – My Dumb Question ??

Recently pulled out an ADC SS-412X Sound Shaper Graphic Equalizer Spectrum Analyzer and would like to know the pro's and con's of using such a device.

I don't know whether i'd consider myself to be a purist or not as i've never hooked this up to my system, nor would i know how at this point.

I would like to know what this unit would bring to the table. I play vinyl, cassettes and CD's. would this be better used with CD's only or all of the above? I'm not unhappy with current system sound quality but curious about pursuing use of this Equalizer.

Any advice is appreciated. thanks

Dip in and out HERE