Does a graphic equalizer show where your amp is lacking?

All amps have a certain signature sound. You want to find one that is as neutral as possible to let the recording come through untouched. The true purpose of an EQ is to correct for room acoustics . If you are using to try and correct your amp get a different amp. Example; an amp with bad mids run into an EQ will only amplify or boost the bad mids. 

I was not aware there were graphic equalizers for sale.  I think this is why people purchase amplifiers that produce the sound they like, as each amplifier has its own sound.  

Fundamentally any good amplifier has no sonic signature. When combined with cables and a speaker the amplifier interacts through the cables and with the speaker such that the three create a unique sonic signature. There are three variables you have to consider to get a sound that you are now attributing just to the amplifier.

Amplifier technologies (design typologies) that have a propensity to create curtain definable types of signatures on average but each combination is again, unique.  There are enough 'outliers' to this state that it is a general rule and not a law.

An equalizer, regardless of controls will shape the frequency and phase response of the above combination handling only the tonal aspect of the audio image you wish to create.  Basic common use is to accommodate specific room-induced interaction with the speaker.  Given that the whole system, that is the room, speakers, cables, and amplifier is a dynamic interactive 'thing', in the end we are lucky to get the sound we do.

Hi Scott 22! You're learning! Good for you! If an added piece of equipment increases your enjoyment, Hooray! Yes, it is like getting different speakers; and much cheaper.  There is good stuff available from manufacturers you haven't heard of, but a company's reputation is worth something. Some outfits have not much to sell besides their reputation and don't mind taking your money for the "pride of ownership." When you read reviews, remember sombody is paying for that review. When they say, "I bought the review sample," you can believe them. When they say, "If you are looking for an XYZ in this price bracket, this is worthy of consideration." it means "eeenh." It is very risky to buy something you have not heard - in person. Be sure you can afford (or return) the gamble. Your grandmother could have told you that. Good gear is available used for much lless $$. Keep Smiling.

Thanks everyone for taking the time to respond. Imhifiman and Yogi42 yes ears for sure hearing is shot at 75. bomerbillone Schiits seems not to be Shi$ and for $150 it was a good toy for being a pandemic shut in and boomer keep on keeping on. holms agreed I bought 600 classical CDs for $200 mostly from the 1990 and late1980, Oh my what fun this has been listening to all these recordings what an education.

Here's to my 7th grade music teacher Charles Higgins from Trenton NJ. A wonderful man we would come to class put heads down on the desk close our eyes and he would play the masters Beethoven, Bach, Mozart etc. who know decades later the lessons learned in that class would bear fruit later in life.

Nekoaudio thanks for the explanation.