Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EXT-AUD-1000 found under Amplifier Audio Fre by Gefen Inc. The National Stock Number assigned to this part is 5996016424224, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EXT-AUD-1000.