The most used turntable is the one in the center, which is a very early low serial number Thorens TD 150. Back in those days in the sixties, it could be bought less PU arm and plinth. I had to replace the Papst synchronous motor to a 60 cycle AC one from a 50 cycle AC one when I moved to North America.
It has had a number of different arms on it over the years, and I have had to make new arm mounting boards over the years. Those Thorens TD 150s are iconic as they were the fist belt drive turntables.
The current PU arm is an SME series III with a Shure V15xmr.
Alastair Robertson-Aikman the founder of SME was a brilliant and obsersional mechanical engineer, and intensively researched the relationship between arm mass and cartridge compliance. He made the point, routinely ignored, that ideally arm and cartridge should be designed as a unit. His point that he made from his calculations is that there is an optimal arm mass and inertia for a given cartridge compliance. If you think about it this is intuitive and obviously correct, as an arm cartridge combination is a resonant system, as cartridge compliance describes a spring system
Anyhow, what this amounts to is that the higher the compliance of the cartridge the lower total arm mass needs to be and the obverse is true. Now it should be obvious that the higher the cartridge compliance and the lower the tip mass, the less the record wear.
Anyhow, he designed the SME series III specifically for the Shure V15 cartridges. This results in a perfect mechanical system. The arm is lightweight but very rigid due to the arm being made of Tungsten, which is very rigid but lite. Unfortunately those cartridges are NLA. but I have my stock. In my view it makes the very best system for playing vinyl records and also preserving them. So, I have that SME series III/Shure system and a Thorens TD 124 system in the family room with that arm cartridge combination. These not only produce the finest LP SQ quality, but also do least damage to the discs. Having the resonance in the right place makes for the best bass response, which you have commented on when listening to this turntable. So those are my go to turntables.
The one on the right in the AV room, is a Garrard 301 with SME series II arm with Shure V15 series III cartridge, I mainly use that for boxed sets that were made for continuous play on autochangers, to minimise play gaps.
The turntable on the right is a Garrard 301 Decca ffss system with Decca professional arm and H4E cartridge, which is an iconic piece of history. Its preamp is a tube Quad series II tube unit. This unit has all the EQ codes for every 78 rpm disc ever made. The heads slide on, slide off. I have a 78 rpm head made specifically for me under the guidance of Stan Kelly himself, chief engineer of Decca. This cartridge was made for me shortly after I moved to Canada, and we had a nice correspondence by snail mail way back, before the Internet was ever thought of.
Getting all this exactly correct, makes for the superb bass response when playing vinyl. which you have commented on, when listening to my system playing your LPs.
