audio preamplifier

I was wondering if i can use pam8403/8601 as a pre amp so that the audio volume wont go down due to bass, is it a good idea?

I have received an example schematic of how an audio preamplifier should look like. Based on that and a set of data(input voltage(7V), input resistance(60 ohms), output resistance(8 ohms) and amplification(2.1) ) I have to design my own schematic(which shouldn't be a lot different at the end of...