amp -preamp combination question.


AuGoNers,
Can anyone explain to me what is the different between a SS amp/tube pre-amp combo Vs Tube amp/SS pre-amp combo?.I am planning to buy a krell pre-amp to match(cosmetic) with my cd player,but dont want to get rid of my 300B tube amplifier.
ttrhp

Showing 1 response by mrtennis

there are considerations of output impedance of tube pre amps and input impedance of ss amps that are important. if a tube pre has a high output impedance, it is looking for an input imedance of at least 50000 ohms. what is a high output impedance for a tube pre, probably 600 ohms or higher, i'm not precise on this number.

another issue is dc current produced by the tube pre coming to the ss amp. this could be trouble.

there probably are less isssues in the ss pre, tube amp combination.

i think you would want to listen to combinations to see which you prefer.