K1803 input from 40mV to 2.5 v

Can someone please advise how to raise the input level so i can use this in a car audio application.
i read in these topics i can change r5 to 47k that will bring it to 90mV but i need more rise than that.

also, if this can not be done, please let me know
thanks in advance

due to zero feedback to my post, i went ahead and tried the hu that says it puts out 2v… terrible choice.
i also changed r5 to a 47k which helped with a 1v input but the gain cannot pass halfway.
Warning to any car audio guys, this kit can NOT handle a car radio signal. still a fun kit though