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 dbld

When you do the "Bolero" test, what are you looking for beyond a potential DC leakage hum/buzz?

I just did the Bolero test, but with different quiet music since I don’t have Bolero. I did not get any abnormal buzzing/noise. It was quite loud which brought out a lot of the recorded "hiss". Do I need to find a quieter recording to tell if this "hiss" is some sort of incompatibility [I am running 2M balanced ICs from my CDP to my amp]?

This hiss is also there when the pre is in the system, but I am not so sure it is the same level of hiss...I guess I need to spend more time on this. The recording I am using is great music, but poorly recorded. I’ll try finding a better recording.