Welcome to the AGF Flower.
Have you tried some different strings on it, something the manufacturer rates as a mellower tone of string?
My eyes got opened recently when I tried some medium gauge strings on a few of my guitars. I had always stuck to one string set and all of a sudden, I discovered my guitars could sound much better than what i had previously heard from them.
Maybe a set of medium strings like the GHS Vintage Bronze would help you get a more mellow tone.
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