Originally Posted By: Will_3
Best way to connect PC to PA ?

Mechanical considerations are trivial (ie 1/8" or 3/32"). Critical is connecting to some other system without knowing its electrical nature.

Another noted unbalanced signals. Critical especially if a PA's safety ground is unknown - or worse missing.

Use galvanic isolation when connecting to an unknown system. This not only eliminates ground loops (ie hum). It also protects computer hardware.

No surge protector even claims to protect from noise or those potentially destructive anomalies. View its numbers. Near zero noise protection is virtually no noise protection.