Hello everyone. First time posting.

A year ago I bought exactly the same GTII but failed to fire it so far. Why? I’m afraid to damage the amp. I can’t find any info about the impendance or the total load of the amp or the “Ω” thing in relation to the the GTII. I’ve got 1971 Fender Bassman 50. Total load 4 Ohms. Can I plug GTII between the amp and the speaker and run it with no worries? Please help me! I’d like to play with this thing so much but so far it’s quietly sleeping in the shelf because of my ignorance.