Out of practice and trying to connect vinyls

Hi all,
I haven't played in a while and i have a vinyl itch. Im trying to connect two Technic vinyl decks to control pro 2.
After much fiddling about last night i did manage to get sound from both but not good quality sound at all. Levels were through he roof at very low volume and very muffled sound.
In preferences i followed the manual, have phono selected and reduced the dB right down in case this improved sound quality. Also changed to line on the Cross panel.
I did notice that if i connect one deck the sound was good and as soon as i connect the second the sound quality dropped right down again.
Can anyone give any advice?
I haven't played in a while and i have a vinyl itch. Im trying to connect two Technic vinyl decks to control pro 2.
After much fiddling about last night i did manage to get sound from both but not good quality sound at all. Levels were through he roof at very low volume and very muffled sound.
In preferences i followed the manual, have phono selected and reduced the dB right down in case this improved sound quality. Also changed to line on the Cross panel.
I did notice that if i connect one deck the sound was good and as soon as i connect the second the sound quality dropped right down again.
Can anyone give any advice?