How loud is +40 db Gain?


Gin-Choobinest Member
Staff member
I'm looking for a suitable audio amplifier for my portable and I found this one. It is easy to use, but the datasheet says it has +40 db gain. 40 db is just under normal conversation, so that's much too quiet for a portable.
Is there a difference between 40 db and +40 db gain? How loud would this be in relation to a portable?
So, for an N64 portable, is that a decent loudness? How would it compare to the PSOne screen?