I managed to get a Pioneer PL-S30 from a friend who was offloading it. It's pretty old but seems to work. It comes with a red Audio-Technica cartridge (I think it's an AT70). While looking for documentation I think it might also be known as a PL-340. Anyway, has anyone heard this turntable before? Any knowledge on whether more expensive cartridge or phono preamp upgrades are worth it for this?