Most modern gear has compatible levels for pre-out and main-in. However, I had a dentist client that just bought a whole stack of Mac with Klipsch speakers. The speakers were quite efficient, not to mention the characteristics of horns. And since there was no option to adjust the input levels on the main, he had a lot of hiss at zero volume on the preamp.
Solution: install some RCA line attenuators between the two.
However, you may not have any issues at all.
Solution: install some RCA line attenuators between the two.
However, you may not have any issues at all.