We recommend the CDJ-2000NXS2.
Direct digital connection and 96 kHz/24-bit sound card accurately reproduce high-res audio. Pro DJ Link (LAN LINK) function is available and enables even more features.
Please note that the DJM-900NXS2 does not support the FADER START function.

The following terminals support balanced type inputs/outputs:

-MASTER1 output terminals (XLR)
-BOOTH output terminal (TRS)
-MIC1 input terminal (XLR/TRS)
-MIC2 input terminal (TRS)

Use a commercially available 100BASE-TX-compatible switching hub. Depending on the switching hub, the unit may not operate properly.

LAN terminal specifications conform to 100BASE-TX standards.
Use a commercially available category 5 class LAN cable. Depending on the LAN cable, the unit may not operate properly.

Also, when connecting with a Pioneer DJ player, we recommend using the LAN cable included with the Pioneer DJ player. Note that this unit's LAN terminal has a Pioneer-specific interface, so LAN connections to other brands of DJ players are not possible.

-When controls and buttons on this unit are operated, the corresponding MIDI signals are output to the computer via the USB cable. (See the operating instructions for details.)
-Signal assignments cannot be changed on this unit.
-This unit does not support input of MIDI signals.
-This unit does not have MIDI DIN terminal.

Performance is not guaranteed via a converter cable (converter plug).
Connect the MASTER1 and BOOTH output terminals to an amplifier with XLR inputs, the MASTER2 output terminals to an amplifier with RCA inputs.

The SEND/RETERN terminal enables audio output from the channel selected by the effect channel switches in the BEAT FX section (1 - 4 channel, MIC, CROSS FADER A/B or MASTER) to an external device.
You can apply Beat FX and external FX at the same time thanks to the independent Send/Return section.
You can change SEND/RETURN effect routing using [SEND/RETURN] switch and [RETURN TYPE] switch.
Selectable effect routings are as follows:

-[SEND/RETURN] switch
You can change terminals for SEND/RETURN.
When you select [1/4" JACK], the audio signals input to/output from the [SEND/RETURN] terminal on the back of the unit, in the same way as the DJM-900NXS.
When you select [USB], the audio signals input to/output from the USB terminal at the upper right section of the operation panel. This enables digital SEND/RETURN to Inter-App Audio effector applications on an iOS device such as RMX-1000 for iPad without deteriorating sound quality.

-[RETURN TYPE] switch
You can change RETURN effect routing.
When you select [AUX], the sound with the effect returns to a different channel where [RETURN AUX] is selected at each channel input switch (1 - 4).
When you select [INSERT], the sound with the effect returns to the same position selected by the effect channel switch. You can completely switch the original sound to the sound with SEND/RETURN effect.

Please refer here.

The positions of the selector switch are described as below. For details, see "Block Diagram" in the Operating Instructions.

1 - 4
Pre-faders for the respective channels (A pre-fader effect is applied before it is routed through mixer channel faders)

MIC
Post position after the MIC EQ and MIC volume is applied.

CROSS FADER A/CROSS FADER B
Post-crossfader A or B (post-fader effects allow the effect tail to be heard after the crossfader A or B is closed).

Master audio
Pre position before master volume is applied.

Please note: SEND/RETURN does not work on the following conditions:
-A Cable is not connected to the terminal selected by [SEND/RETURN] switch.

-[RETURN/AUX] is not selected by any channel input switch when [AUX] is selected by the [RETURN TYPE] switch.
-Inappropriate audio signal loop is identified based on the selection of the effect channel switch, input switch of each channel, CROSS FADER ASSIGN switch of each channel when [AUX] is selected at [RETURN TYPE] switch.

No.

It is a balanced terminal.
For its polarities as seen from the front of the terminal, see the diagram.

The sound is the same, but it is not affected by the master volume setting.

No. The DJM-900NXS2 does not support the FADER START function.

With this unit, the PCM audio signals can be input. Dolby Digital and DTS audio signals cannot be input.

The digital input specifications are as follows:

Input format: S/PDIF
Sampling frequency: 32 kHz/44.1 kHz/48 kHz/88.2 kHz/96 kHz
Sampling bits: 16/24 bits

Yes.

TIP = HOT, RING = COLD, SLEEVE = GND

Yes. Connect audio cables to input audio signals from the CDJ to the mixer.

Yes, you can use all the functions of this unit.

This slot is for mounting a theft-prevention wire lock.

Pioneer DJ does not sell a rack mount kit specifically for this unit (as of Feb.h 2016). If you are considering mounting it on a rack, you should consult a rack building specialist, etc.

DJM-900NXS2 measures 333 mm in width,418mm in depth, while the DJM-900NXS measures 331 mm in width, 409mm in depth.
You may be able to use DJM-900NXS's flight case by rearranging its inner cushion.
However, please note that use of the DJM-900NXS's flight case is not guaranteed by Pioneer DJ.

If this unit is connected after the DJ software is launched, the DJ software may not recognize this unit. Launch the DJ software after connecting.

The following iPads/iPhones/iPods can be used with the unit.

iPhone 6s Plus, iPhone 6s, iPhone 6 Plus, iPhone 6, iPhone 5s, iPhone 5c, iPhone 5, iPhone 4s,
iPad Pro, iPad mini4, iPad Air 2, iPad mini 3, iPad Air, iPad mini2, iPad mini, iPad (3rd and 4th generation), iPad2,
iPod Touch (5th and 6th generation)

Note: Android is not supported.

If you're using a PC/Mac that only has a USB Type-C port, you'll need a USB Type-C (plug) to USB Type-A (socket) conversion cable (sold separately).
When using one of these cables, be sure it's a product recommended by the manufacturer of your PC/Mac.

You should connect the unit directly to a USB port on the PC/Mac.
Connecting via a USB hub may cause unwanted noise or malfunction.
If you have to use a USB hub due to a limited number of USB ports on your PC/Mac, be sure to use a product recommended by the manufacturer of your PC/Mac.