Sorry, A wallwart is what comes with low voltage equipment, it's a transformer. You see them with cell phones(chargers), computer gear and sometimes audio equipment.

Also, I hope that I didn't insult your intelligence. I like helping out if I can.

The "crackle" , does it sound like static?

Tom

M80's VP150 QS8's Earthquake SuperNova MKV-15
Integra DTR-7.4 Outlaw 755 Outlaw M200's Outlaw ICBM