Here's the blurb from Numark ;
MIX ALL YOUR SOURCES AND RECORD YOUR MIX.
X1USB is a two-channel compact digital scratch mixer with USB audio I/O. For any DJ who values the fidelity and precision of their records CDs or digital files X1USB employs a 100%-digital signal path with DSP technology from the music studio pros at Alesis.
This 24-bit mixer faithfully transmits every detail and nuance of your music adding zero distortion and zero noise. On top of its pristine audio path X1USB features computer connectivity for mixing in audio from nearly any source and enabling you to record your sets directly into your Mac or PC.
X1USB has two USB ports each assignable as an input or output. As inputs incoming audio can be mixed like any other input. As outputs, you can send you mix out to a connected computer for recording. Because it employs plug-and-play USB, X1USB connects to almost any Mac or PC with no drivers needed, and works with nearly all audio playback and recording software.
X1USB delivers all of the standard DJ-mixer features: three-band EQ for each channel that also functions as Kills, quality faders, crossfader-reverse and slope controls, and multiple outputs.
X1USB's look-ahead peak-limiter completely eliminates clipping so distortion will be just a distant memory. X1USB also features a Sub-Bass Synthesizer control that allows you to increase the intensity of the ultra-clean bass in your mix.
Tons of controls, the ability to mix-in audio from your computer, and output to recording software make X1USB an ideal mixer for all DJs.
Well made, steel casing, not a cheap plastic toy by any means. Perfect for a more portable setup where a full 19" rack mixer isn't justified. The inputs can be switched between USB and two LINE inputs, so this mixer will double up with a CD player or similar, just flick the switches over.
In practice it works well, the digital output was clean. The mini crossfader for headphone CUE works well, though I wish Numark had put the headphone socket on the top, not on the front!
Pros : Good quality kit, ideal for a portable setup especially where you don't want an external sound card.
Cons : Needs two USB sockets on the host PC to run two channels and Numark only supply one A-B USB cable! So you'll need to steal a second USB lead for multi channel use.
Not all software can access the two USB channels as they don't have ASIO drivers. Most can and to help we've tested dual channel mode and posted settings for popular programs here ;
PCDJ Karaoki
PCDJ Red Mobile and Dex
PCDJ VJ, Numark CUE, Virtual DJ
