Here is a 1974 Rickenbacker 4001 that Wills scooped up off of eBay. He had to upgrade its tuners and pickguard, but loves how low, rumbly, and mean this bass can sound and uses it on “Wildfire” from their latest record, Mosiac.






















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Zach loves his Sovtek Mig 60 head, which he plays through a cab he built himself at a pipe-organ shop in Denver. Every glue joint is lined with thin leather for maximum air tightness, and it’s stocked with Celestion G12M Greenback speakers.







![Devon Eisenbarger [Katy Perry] Rig Rundown](https://www.premierguitar.com/media-library/youtube.jpg?id=61774583&width=1245&height=700&quality=70&coordinates=0%2C0%2C0%2C0)














