Classe CP-60 vs. CP-50

Anyone own both of these pres? Interested to know differences? I know the 60 has a separate power supply, but that is about it...

They sound a lot alike with the 60 sounding more dynamic. The 60 may be worth the extra money if you are using a nice turntable because it is a little quieter.

They are some of the best sounding solid state pre-amps out there with holding their own with a handful of other solid state pre-amps and stomping a ton of others.