Pioneer DJM 250 Remix Decks Aux to quit

Hello,

I am using the DJM 250 and Timecode Vinyl with Traktor and Interface A10, I connected the Remix Decks (control f1) to the Aux of the Mixer, as I read in many forums it works well. I tried this way and it works, but not properbly the sound quality of the aux is not the same as on channel 1 or 2, its much more low and the bass is very low, I tried to conect the Remix decks on channel 1 on Deck A and this is much better and sounds good. So how can I use the Pioneer two channel mixer with the remix decks control f1 through aux with the same sound quality as on channel 1 and 2. I am using pioneer s dj60x conected with chinch to XLR

Should I use a three or more channel Mixer? It should be possible with the Aux?!

Please help, thank you