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The Hi Fi amp is analog most of those variation's are small Engineering changes that don't effect the functions . There were to basic flavors the black ones that came from 09 and before and Silver that came after.
These are Analog Amps that only have Analog Input and Output.
Ebay generally has these for sale for under 100 bucks.
All the Hi Fi amps are Analog New or Old they don't change the design that much.
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