REKORDBOX DJ PERFORMANCE HID MODE OUTPUT VOLUME LOW

Hi,

I would like to seek advice from the issue i'm facing now.

I'm a REKORDBOX HID user and a resident DJ in a club

my hardware in club as below

1. CDJ 2000 Nexus

2. DJM 900 Nexus

The issue i'm facing now is when my music volume is very low even i put all my AUTO GAIN to the highest level.

i have to twist my personal channel GAIN to 1 o'çlock" then only can match the volume.

may i know other then auto gain can tune my output volume, is there any other place that i can fully realest my volume or maybe bring up my music volume?