Check out the gear the guys are using on tour.
Joe Perry's Marshall JTM45 Reissues
Perry has a trio of Marshall JTM45 reissues, two are backup. He uses the amp for a siren sound he achieves with a special pedal, but they're also set up to run the whole rig if something goes wrong. The Jet City JCA20 was used extensively on Aerosmith's new record, but on the road it's used exclusively for his talk box. Perry says that it's the best sounding talk box amp he's encountered.