You moved from a high output cartridge to a low output one. Change the gain from 45 dB to 60 dB and you’ll be fine. I use the ART9, at 0.5 mv and it works great!
If you still feel that isn’t enough (I doubt you will, given the 0.6 mv of your cart), then you can send it to Manley for the latest update. That adds two extra gain settings of 50 and 65 dB of gain for only $75.
If you still feel that isn’t enough (I doubt you will, given the 0.6 mv of your cart), then you can send it to Manley for the latest update. That adds two extra gain settings of 50 and 65 dB of gain for only $75.