Landry Amps LLC guarantees its amplifier to be free of defective materials and workmanship for a period of five (5) years from the purchase date to the original owner. During this five-year period, Landry Sound will repair or replace the unit free of charge if the item is returned freight prepaid to and from our service facility. This warranty does not cover vacuum tubes and transformers, which are guaranteed for 90 days from date of purchase. This limited warranty does not cover abuse, drops, acts of God, mismatch of voltage applications or any application outside of guitar amplification, nor factory-unauthorized modifications. Only a Landry Amps technician can perform repairs to maintain warranty validity.