I have an older US AMPS USA-425 4 channel in mint condition...been sitting in stock room for a while..try 9 years...got it tested..works fine..puts out 36x4 @ 4 ohm..rated at 25x4 @ 4 ohm in manual...got it hooked up...volts at 14.4V..sounds great..nice and clean..just want to know how long it will last...its my first 4 channel...just wanna know if it will last like 2 or 3 years or more...thanks
