All amplifiers are warranted for a period of six months to the original purchaser against failure of materials and workmanship. No other warranty applies. Tubes are warranted for a period of 90 days; vinyl and coverings are not warranted. This warranty is void if failure occurs due to misuse, abuse, improper maintenance/repair by anyone other then Phoenix Amplification Co., or damage occurs from operating under abnormal, excessive, or unusual conditions. Warranty is void if item is not promptly returned upon evidence of damage. Warranty registration is automatic, with registration date beginning on item delivery date.