If you're worried and want to double check, plug the TT into "tape" and spin a record. What you hear is likely to be very quiet and shelved down in the bass and up in the treble (as all records sound w/o RIAA equalization from a phono pre). If the TT sounds great through the "tape" input, you'll know it does have a phono pre of its own. Trying this won't damage anything. My guess is that you'll end up needing and using the phono stage in your Bob Carver.
Enjoy the TT!