Peavey 1820 400W 4ohm Bass CabNotes The backplate says 3620 but it's only 1x18 like the 1820. Someone must have rewired it in the past. A Peavey 1820 400W 4ohm Bass Cab in Very Good condition! At Evolution Music, we attempt to highlight cosmetic defects (if any) by picturing every angle of every piece of gear so you know exactly what you are getting. We always picture any and all accessories too. What you see is what you will get so please check out the pictures! Everything we