Simaudio MOON 610LP with Lyra Kleos

It's a highly configurable $7500 phono stage so it should be capable of  working with the Kleos.

But how long the OP has had these, especially the phono stage, is a valid question as we can the deal with some possible setup issues.

Is this your first time using and setting up the Sim Alex?

Can't think of too much. I'm assuming you are using the single ended inputs and outputs on the 610 and that the balanced jumpers are inserted?

Apart from that I would be setting the gain initially at least at the 56 dB setting as the Kleos appears to have a relatively high output of around .5 mV.

It also has relatively low internal impedance around 5.5 ohms so I would initially experiment with the loading in the 75-150 range. But Lyra has a very wide range spec'd for loading (supposedly based on the capacitance of your phono cable) so you may end up experimenting with much higher ranges than that.