Why is my Record Level so low


Second time asking this question looking for any help. How to i increase my record volume. For example I use a Numark DJgo2 when i travel. i don’t have to turn the Record level pass 12ock in Serato. On my Denon Mc 7000 in Serato I have to turn it all the way up as far as it will go, and its still noticeably lower. Im using a 2013 MacBook pro, running sierra. I keep my master and channel level in the 12ock position. i make sure the track is not clipping the red. I appreciate any and all help.