K8060 connect to iphone

i want to connect this amplifier to my iPhone 4 for a AS DT project in school. i am a sound technician and study AS electronics but am not really sure what i need to do. I’m reluctant to connect my phone to the amp direct, in case it damages it. Do i use a Pre amplifier or just a potentiometer between the 3.5mm jack and the amp?

thanks in advance for your help

joe

A potentiometer should do the job.
There is little risk in damaging your Phone.
Test the amp with a different source before connecting it to your phone, just in case.