Numark Scratch [8/52] 4 5 6 8 7 7

Rear Panel

4 5 6 8 7 7

1. Power Switch: Use this switch to power Scratch on or off. Power on Scratch only after you

have connected all of your input devices and before you power on your amplifiers and

loudspeakers. Power off your amplifiers and loudspeakers before powering off Scratch.

2. Power Input: While Scratch is powered off, connect the included power cable to this input

and then to a power outlet.

3. USB Port (USB Type-B): Use a USB cable to connect this USB port to an available USB

port on your computer. This connection sends and receives audio and MIDI control

information to and from the computer.

4. Master Out (XLR): Connect this output to loudspeakers or an amplifier system. The

program mix will be sent to this output. Use the Master knob on the top panel to control

the volume level.

5. Master Out (RCA): Connect this output to another mixer, recording device, etc. The

program mix will be sent to this output. Use the Master knob on the top panel to control

the volume level.

6. Booth Out (RCA): Connect this output to booth monitors or a booth amplifier system. Use

the Booth knob on the top panel to control the volume level.

7. Line/Phono Inputs (RCA): Connect these inputs to a turntable, CD player, or other

line/phono-level device. Remember to set the Line/Phono Selector for the corresponding

deck to the appropriate position and to set the Deck Input Selector for that deck to

Line/Phono. While these inputs allow you to mix audio from external devices without a

computer, they also allow you to use a turntable or CD player to control the playhead in

Serato DJ Pro. See Operation > Using DVS with Scratch for more information.

8. Line/Phono Selector: Set this switch to the appropriate position for the device connected

to the corresponding deck’s Line/Phono Input. If you are using phono-level turntables, set

this switch to Phono to provide the additional amplification needed for phono-level signals.

If you are using a line-level device (such as a line-level turntable, CD player, or sampler), set

this switch to Line.

Phono Ground: If you are using a phono-level turntable with a grounding wire, connect

the grounding wire to this terminal. If you experience a low “hum” or “buzz,” this could

mean that your turntable is not grounded.

Note: Some turntables have a grounding wire built into the RCA connection and, therefore,

nothing needs to be connected to the grounding terminal.

10. Mic Input (XLR / 1/4” TS): Connect a microphone or line-level device to this mono input.

Use the Mic Level knob on the top panel to control the volume level.