Ok, so you’ve been using extremely low compliance cartridge (Denon 103) on lightweight Rega tonearm (11g effective mass) probably without knowing what is a cartridge/tonearm resonance frequency. This combination is a miss match if you don’t know. For Denon you need an arm with very high effective mass, definitely over 20g (something like 30g), but your Rega is just 11g, and it's better for mid compliance MM or MC.
Now you have SoundSmith cartridge with 10cu compliance which is still very low!
Without understanding tonearm/cartridge matching you can’t buy an arm. You definitely need an arm with high moving mass for those two cartridges. Pay attention to cartridge dynamic compliance at 10Hz and to tonearm moving mass.
Now you have SoundSmith cartridge with 10cu compliance which is still very low!
Without understanding tonearm/cartridge matching you can’t buy an arm. You definitely need an arm with high moving mass for those two cartridges. Pay attention to cartridge dynamic compliance at 10Hz and to tonearm moving mass.