I just set up my new turntables-2 Stanton SR-80s and a Stanton 3 channel mixer. The one problem is that I can't preview each channel in the headphones while the tables are playing through my speakers-basically the headphones are only playing what is going through the speakers.

Does anyone have any advice on how to fix this problem so that I can preview my tables through the headphones?

Thanks!!
Ty

what Stanton mixer do you have?