@Terry > Sorry for missing this, hopefully you're receiving notifications and will comment back if you're still having issues. @photom2 > Have you verified that your gain stages are all up? 1) Play a track in Serato DJ on the deck 1 2) Flip the 'LEVEL' switch to CH1/2 - you should see signal on the channel meter 3) Take the channel fader to the top, cross fader to the left 4) Flip the 'LEVEL' switch to MASTER 5) Adjust the MASTER LEVEL knob to show signal on the meters 6) Check your output device (speakers, etc). Let me know if that helps. Your quote: Have you verified that your gain stages are all up?.I have just bought this unit so don't know what 'Gain Stages' are. Also, you say, 'have I checked the 'Output and Speakers' I know it is strange but I don't have speakers.