Topic: Best impedance matching
I have a question about the best impedance matching of the RME ADI2 pro FS BE. This is about the analog input.
My turntable goes to a Croft RIAA. There isn’t an official output impedance available, but somewhere on the internet it is stated as 500 Ohm. It is a tube amp.
The sound through the analog input of the RME is excellent. The only thing is that the input signal on the analyzer isn’t higher than say -40 db. Volume isn’t a problem btw.
A second set up is to install a Croft preamp between the RIAA and the RME. Output of this preamp is stated at 800 Ohm. The input on the analyzer is way better and can be optimized though the volume potmeter of the preamp. To my ears the sound is comparable. Ofcourse the Croft pre is coloring the sound. Both Crofts are tube amps.
I use for input and output on the RME the Auto Ref feature.
Which of both setups would you recommend?