I'd upgrade it or dump it. Its too old to plug in.
Hafler DH 500 update?
My brother just gave me an early DH 500. It seems to sound fine to me. It hasn't been used alot for many years so I am wondering if I should at least have it checked out and have the old board components upgraded or just go ahead and use it until something gives out. In other words, would I gain anything by premptive action?