The TAD 150 Signature's phono stage is made for high output cartridges. The OP's Lyra Clavis puts out a low 0.25mV.
I also wonder how you couldn't notice the totally tipped up treble and rolled off bass (i.e., completely unlistenable tonal balance) when connecting your turntable directly to the TAD monoblocks without benefit of RIAA equalization.
Based on your last post, you need to talk to the previous owner, your uncle. It's hard enough for us to ferret out the specs and characteristics of the discontinued standard model. Since it's a modified one-off, we have no idea what it does or doesn't do.
I also wonder how you couldn't notice the totally tipped up treble and rolled off bass (i.e., completely unlistenable tonal balance) when connecting your turntable directly to the TAD monoblocks without benefit of RIAA equalization.
Based on your last post, you need to talk to the previous owner, your uncle. It's hard enough for us to ferret out the specs and characteristics of the discontinued standard model. Since it's a modified one-off, we have no idea what it does or doesn't do.