I have a Pioneer PL-S50 turntable that I want to connect

According to the specs there aren't any phono inputs which would have their own preamp. Everything else is line level so I'm pretty sure you'll need a preamp either between the turntable and one of the line level inputs or built into the turntable.

You need to hook it up to another analog input other than the phono input. The record player has a built in preamp, and the receiver's phono input has a separate preamp for non-amplified players. You cannot have the two hooked to each other.

Hi, there is no reason for the turntable not to work with your amp. This amp has 2 phono inputs. Moving magnet and moving coil. Your tt likely has a moving magnet cartridge fitted so connect via that input. Cheers John. styluscity.com

http://www.vinylengine.com/library/pioneer/pl-514.shtml
http://www.hifiengine.com/manuals/pioneer/sx-550.shtml
The upper link is for the turntable, the lower is for the receiver. they want you to create an account tu dowlnload so just create an account with them. In my expierience turntables had hook upeads out the back(wires connected) that would hook to phono in on receiver and speakers would hook to receiver via speaker wires(may not be included) by pos and neg. The speaker wire usually either has a rib or a line or writing on on leg so you can identify which wire you would want to be pos or neg.

The red wire is the right channel, so going back to your amp, get a single phono plug with with the wire exposed, so you can touch the wire. Then remove the turntable connections. With the amp on plug the the lose wire plug into each channel and check if the sound on the right is still low. If it is then there's a problem with the magnetic cartridge pre-amp inside the amp. They are often located near the phono socket on a seperate PC board, but if not just follow the red wire to the main board. Chances are it will be an IC that's failed.
If it has a strong buzz at the back of the amp. Then I should replace the wire between the turntable and the amp. Or the right phono plug that connects to the amp.

hook the turntable "directly" up to the "phono" inputs. if it sounds normal this way, and not loud and distorted, then you have to plug the turntable up that way, directly to the reciever's phono input.

you can hook the eq up through the "tape in/out" jacks.

take the tape record out jacks, and hook them up to the input of the eq, and take the tape play input jacks and hook them up to the output of the eq. then, to use toe eq, select whatever input you want eq'ed, while also selecting "tape monitor"

Hi...
If the new receiver doesnt have a specific input in back labeled "phono" , You WILL need a preamp for the phono. Then plug the preamp into the AUX or other available input

no need for phono, you can go to radio shack and get a selection switch to make things easier.

No phono inputs?? You will need a phono to line level preamp to use aux input.