I have an older Roland SCB-40 Cube Bass amp.
It has 2 inputs, labelled "High" and "Low".
I've always plugged the Fender PBass into High.

I found the specs for the inputs:
High .... -23dBm/330kΩ
Low .... -13dBm/ 65kΩ

Those numbers are Greek to me (excuse the pun).
What instrument/mic would be appropriate to plug into the Low jack.

Thanks!
LLOYD