K8098 mod for line signal

Hi just made this baby today, pvpa20´2
I want to use it with a whitenoise generator to test guitar pedals EQ (that i make myself)
but i can see the kit is made for much higher level and much lower impedance than a guitar signal.
Is there anyway to mod the input to make it more sensitive ?, its fine the scale is wrong
or do i need to put a small amp in front
carsten Denmark