With "load" I meant the internal impedance of the cartridge. The step-up that is built into the Shindo is optimized for low impedance cartridges 2-6Ohm is about ideal. Some higher impedance ones may still work but it may become worth experimenting with external step-ups as well. Loading is not the only important things as the Argo and Delos are close but the Argo was less than ideal.
I never got the Argo to work that well with the Monbrison and ended up using my Allaerts exclusively with an Auditorium 23 external step-up (which is close to optimal for the Allaerts). Recently I got the Lyra Delos as a backup cartridge as I always liked the dynamic, lively and direct house sound. The Delos works surprisingly well into the Monbrison and has just the right balance of live and dynamic, body and textures. Since the Kleos is somewhat close to the Delos I would hope it may work as well, but it does have slightly different electrical characteristics.
