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Lexicon I-ONIX U42S USB 2.0 Audio/MIDI Interface

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Brilliantly designed, the I-ONIX U42S recording interface from Lexicon fits where it makes the most sense, between your keyboard and monitor. Lexicon understands you care passionately about your music... Click To Read More About This Product

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Brilliantly designed, the I-ONIX U42S recording interface from Lexicon fits where it makes the most sense, between your keyboard and monitor. Lexicon understands you care passionately about your music, and that it's more than just a pastime, which inspired them to create the I¢ONIX U42S, putting all monitor and input level controls at your fingertips.

Featuring dbx microphone preamps on every channel, the I¢ONIX series recording interfaces are more than equipped to provide professional recordings that keep your music sounding its best. The preamps run on a high-voltage supply to guarantee stability and provide you with a superior recording across a wide dynamic range. Performance driven A/D - D/A converters ensure pristine 24-bit/96kHz audio to capture every subtle detail of your performance.

The included Pantheon II VST/AU reverb plug-in features 6 reverb types with 16 adjustable parameters, as well as 35 factory presets that range from Vocal to Live Sound and Special Effects. It's easy to complete your mix and make your music sound its best with these exquisitely rich, full reverbs that have made Lexicon famous.

Also included with the Lexicon U42S is a software suite featuring Steinberg's Cubase LE4 and Toontrack EZdrummer Lite.


  • USB 2.0 connection to DAW”up to 480Mbps
  • 44.1 to 96KHz sample rates, 24-bit resolution
  • 4 Analog 1/4" and XLR combi-jack inputs on the rear panel for mic/line inputs
  • Record up to 6 sources at once
  • 2 Analog 1/4" TRS (Stereo Main) outputs
  • dbx high-voltage, ultra-low noise mic preamp's on all analog mic/line inputs (4 total)
  • 2 Hi-Z instrument inputs
  • Supports Windows and Mac platforms
  • 48V phantom power for each input pair
  • Input signal metering via 8 LED's per channel
  • Signal mixing and stereo bus signal metering
  • 2 1/4" high-output
  • headphone connections
  • MIDI In/Out
  • S/PDIF I/O
  • Zero-latency monitoring
  • Low-latency ASIO drivers
  • Lexicon Pantheon II VST/AU reverb plug-in
  • Software suite includes Steinberg's Cubase LE4, and Toontrack
  • EZdrummer Lite
  • Microphone Inputs: Female XLR Pin 2 Hot
  • Input Impedance: 3k? balanced
  • Phantom Power: +48 Volts
  • Maximum gain: +55dB
  • E.I.N. (at max gain): 127dB @ 55dB gain typical (150? source), 130dB @ 55dB gain typical A-weighted (150? source)
  • Maximum Input Level: +8dBu
  • Frequency Response: +/ 1.5dB, 20Hz-20kHz
  • THD+N: <0.02%, 20Hz-20kHz, <0.002%, 1kHz, -6dBu
    Line Inputs: 1/4" TRS balanced or unbalanced
  • Input Impedance: 20k? balanced, 13k? unbalanced
  • Maximum Input Level: +18dBu
  • Frequency Response: +/ 1.5dB, 20Hz-20kHz
  • THD+N: <0.02%, 20Hz-20kHz, <0.002%, 1kHz, +18 dBu
    Instrument Input: 1/4" TS unbalanced
  • Input Impedance: 1M?
  • Maximum Input Level: +10dBu
  • Frequency Response: +/ 2.5 dB, 20Hz-20kHz
  • THD+N: <0.08%, 1kHz, +4dBu
    Line Outputs: 1/4" TRS balanced or unbalanced
  • Level: +18dBu maximum
  • Impedance: 32? Balanced, 16? Unbalanced
  • Headphone Output: 1/4" stereo jack 250mW per channel at 50?
  • MIDI Interface: 5-pin DIN connectors for MIDI in and MIDI out
  • Sample Rate: 44.1, 48, 88.2, or 96kHz (determined by computer application)
  • Dynamic Range: A/D (24 Bit) 108dB typical, A-weighted, 20HZ-20kHz
  • D/A (24 Bit) 110dB typical, A-weighted, 20Hz-20kHz
  • A/D/A (24 Bit) 106dB typical, A-weighted, 20Hz-20kHz
  • Power requirements: Power adaptors for 100”240 VAC, 50/60Hz, 15W
Customer Reviews

Review Snapshot

by PowerReviews

(based on 4 reviews)

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Reviewed by 4 customers

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(28 of 29 customers found this review helpful)


Solid and Clean

By Mark Rakemaker

from Shawnee, Kansas

I'm going to keep it short: Amazing! I would put this up against my high dollar rack mount interface any day of the week. It's very well built, laid out well, and it sounds great! I realize that they made this to sit between your computer keyboard and monitor, but I think that they need to consider a rack model with the same guts and jacks, too. The listed features are all true and right on. I've even run this as a stand alone mixer in a pinch. I think that this is one of the best IO's out there. This is not some little lightweight piece of disappointment. Try one and see for yourself. Good software bundle, too.

(8 of 9 customers found this review helpful)



By A.Haze

from Boulder CO

This little device is awesome! Its so easy to set up and works great with garage band 09. You can record 6 tracks simultaneously. If your going for a small, cheap recording device for many tracks, this is for you!

(6 of 8 customers found this review helpful)


Please Read This Before You Buy

By Mike Jones

from Salt Lake City, Ut

The hardware and features of this audio interface is solid! It is a very well built device. The pre-amps and A/D converters are top of the line quality. This interface does not currently have drivers for OSX Snow Leopard! I can't comment for the Windows drivers, but I know they don't have ones yet for Windows 7, but Vista 32 and 64, I believe they do. However, they do have beta drivers available, but they're not on their website. You will need to contact their support and they'll email them to you. If you purchase this, I recommend emailing Lexicon for the drivers, as it takes them a few days to respond. That way you'll be ready to go as soon as you get the U42S! Lexicon has not given any dates as to when they'll fully support snow Leopard. That being said. If you need to make sure your interface is going run no problem either run an OS that they currently have tested, working drivers for. If you want to use the cutting edge OS, and Snow Leopard is a very nice upgrade, then go for the IONIX, you get a lot of features, it's a very sexy looking device, which is one of the biggest selling point for me, it looks awesome on my desk, and I love the level lights bouncing up and down! It sounds great at a very nice price. It's well built, and the hardware will last a long time. Also having two headphone outputs with their own volume controls is a killer feature! Great for those times when you're collaborating with someone in the studio and need to keep quiet so you don't disturb the peace.

(2 of 3 customers found this review helpful)


U42S is awsome

By Mike

from Stow, Ohio

I use this with Mac OS 10.6 and it works great. I upgraded the EZDrummer to the full edition and it works extremely well. Using the MIDI is easy with my Roland V-kit and keyboard.

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