I posted a reply on a similar topic recently but it has since been closed so I thought I'd start off a thread.
Basically I bought the S4mk3 a while ago as I don't have room for 2 mixers etc so needed something to work as a controller but also to run my 1210's through.
The quality is really poor though, loud hum on each channel, quiet and generally poor sound quality. It sort of sounds ok if you're just mixing vinyl on it's own but it sounds terrible alongside mp3s. In contrast to this I switched it out for my 15 year old Pioneer DJM200 2 channel to record a vinyl mix and the sound quality was night and day.
Is there anything I can do in between the decks and the S4 to improve this or do I just have to accept I bought the wrong kit? What even is the right kit though? Is there a Pioneer equivalent that doesn't ruin the vinyl sound quality?