Passive preamps: What are the relevant numbers?


I'm trying to decide whether I am going to add a passive preamp to my system, but I've been reading that system compatability is very important. What numbers should I be looking at in the specs of my CD player (Rotel 1072), Amp (DNA 0.5) and Interconnects to judge whether a passive preamp might work well in my system?

I know that there was previously a thread about this, but it seems to have been deleted.
davetroy

Showing 1 response by drubin

I'm not sure what your amps input impedance is, but if it higher than 40Kohms you shuld be fine
Do you consider this a general rule of thumb where passives are concerned, that they feed into loads of >40K ohms? Why is this?