80-18kHz doesn't mean a thing until it is matched with the db figures for the same.

It could mean flat from 80-18k (very unlikely) it could mean 80-18k at -3db, it could mean 80-18k at -9db... (all utterly different in sound).

Don't let specs fool you. They are just like statistics. Easily bent to display what the vendor WANTS you to think.
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An arranger is just a tool. What matters is what you build with it..!