The SK-6 is a low-priced fader which includes both a Focus Fader Version 1 in addition to the regular fader. It also offers assignable effects capabilities for all channles as well as a option to switch the headphones from the cue to the master output.
The SK-6F is a low priced 2-channel mixer which offers quality performance. The SK-6F comes with the version 1 Focus Fader and the standard SK-6 Alps Fader. Its other features include assignable effects capabilities for all channels and a pre/post fader cue. A great value at its price, the SK-6F is a good fit for a scratch DJ on a budget.