New Lyra Delos wheres the bass?

Check the phono amp loading settings. It sounds like you need to change the settings on your phono amp. I would start with the cartridge's recommended loading and try a few more settings in the range up and down. It sounds like you may have an impedance issue. Recommended loading: 91ohms ~ 47kohms (w/o transformer), 5ohms ~ 15ohms (w/transformer connected to 47kohm MM-level RIAA input)

Did you check your VTA? I ahd a Delos for about 30days and traded it up for the Kleos. But although the Kleos does deliver more bass the Delos wasn't lacking to a point of concern. Not knowing what your previous cart. was, the Lyra is a fairly tall body by comparison to some, so VTA would be my first checkpoint.

I had the delos for a few months now & of all the carts that i have heard in my system the delos has one of the best bass around. I think some where in your chain there is something amiss.

I know this is dumb but what but have you checked the tracking weight?

Cyclopse, the Delos is only my first Lyra and the bass is consistent enough to shake a solid concrete floor and for the listeners to feel it in their stomach and lungs. I set "level" VTA on my Phantom II such that it matched the setting when the stylus was resting on the gauge (i.e. using the integral spirit level.) Obviously this type of spirit level is probably only accurate to < 30 arc minutes but gives an excellent ball park indication and avoids overcooking/undercooking the VTF when we start messing around with VTA. For me it has proved indispensable.
Hope this is helpful.