MOTU UltraLite MK4 Hybrid USB 2.0 Audio Interface

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18x22 USB audio interface with DSP, mixing and effects

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Manufacturer: Motu

Category: Recording & Playback

*Note that the price is based on when we previously had this product in stock. When placing an order for an item temporarily out of stock, in most cases the price will remain the same, however occasionally the price may be subject to change. If this is the case then we'll tell you straight away and offer a refund.



The latest in MOTU's award-winning UltraLite series, the UltraLite-mk4 is a USB audio interface with 40 simultaneous I/O channels (18 in, 22 out). It also delivers exceptional sound quality, new ultra-low latency drivers and expanded DSP for studio-grade mobile audio recording.

Ultra-low latency

New, optimized drivers for both Mac and PC deliver ultra-low latency performance. With a high-performance DAW such as Digital Performer, the UltraLite-mk4 delivers an astonishing round trip latency (RTL) of 1.83 ms (milliseconds) on OS X and 1.84 ms on Windows over USB (at 96 kHz with a 32-sample host buffer).

Housed in a compact, aluminum-alloy enclosure you can take anywhere, the UltraLite-mk4 is equally well-suited for studio and stage, with or without a computer. As an interface or mixer, the UltraLite-mk4 provides 18 ins and 22 outs, for a total of 40 simultaneous I/O channels.

Connect all of your audio gear, including speakers, headphones, mics, guitars, synths, keyboards, drum machines, effects processors and even MIDI devices.




Sample rates: 44.1, 48, 88.2, 96, 176.4, 192 kHz
Mic/guitar inputs: 2 x combo XLR/TRS mic/guitar inputs
Preamp gain: 0 to +60 dB (digitally controlled)
Instrument gain: 0 to +30 dB (digitally controlled)
Analog inputs: 6 x 1/4" TRS line inputs (balanced/unbalanced)
Max level: +24 dBu (digitally adjustable -96 to +22)
Analog outputs: 10 x 1/4" TRS line out (balanced, DC coupled)
Max level: +20 dBu (digitally adjustable -4 to +20)
1 x 1/4" TRS stereo headphone
Digital I/O: 1 bank (8 ch) of ADAT optical at 1x sample rates
1 bank (4 ch) of SMUX optical at 2x sample rates
Switchable to stereo TOSLink (optical S/PDIF)
Total I/O: 18 in / 22 out (40 total) at 1x sample rates
14 in / 18 out (32 total) at 2x sample rates
8 in / 12 out (20 total) at 4x sample rates
Computer I/O: 1 x USB 2.0 audio class compliant / USB 3.0 and iOS compatible
Computer I/O channels: 64 in/out at 1x (44.1 to 48 kHz)
32 in/out at 2x (88.2 to 96 kHz)
24 in/out at 4x (176.4 to 192 kHz)
16 MIDI channels to/from computer host
Headphone: 1 x 1/4" TRS stereo phone (assignable)
Phantom power: 2 x individual +48V
Front panel: 1 x 1/4":

TRS headphone output

2 x XLR/TRS combo inputs
1 x digital rotary encoders • main/phone vol/pwr
2 x digital rotary encoders • mic/instr input gain
4 x switches • (2) Pad and (2) 48V Phantom pwr
128 x 48 pixel LCD for level meters / menu nav
Power     External 12-18V DC power supply
1.0A max • tip pos or neg
Dimensions and weight:
8.6 x 7 x 1.75 inches
22 x 17.75 x 4.5 cm
2.3 lbs / 1.04 kg

Mac System Requirements

    1 GHz Intel-based Mac or faster
    2 GB RAM; 4 GB or more recommended
    Mac OS X version 10.8 or later
    Available USB 2.0 or 3.0 port
    A large hard drive (at least 500 GB for recording)

Windows System Requirements

    1 GHz Pentium-based PC compatible or faster
    2 GB RAM; 4 GB or more recommended
    Windows 7, 8 or 10
    Available USB 2.0 or 3.0 port
    A large hard drive (at least 500 GB for recording)

Web App Support

    Any web client platform: Mac, Windows, Linux, iOS, Android
    Any web browser: Safari, Firefox, Chrome, Opera, Explorer, etc.

Included Software

    MOTU Discovery App for Mac & Windows (finds connected MOTU interfaces)
    MOTU Discovery App for iOS (available from Apple App Store)
    MOTU Control web app (served from the hardware itself)
    AudioDesk 4.0 for Mac & Windows (separate download)

Operating Systems

    For computer audio I/O: Mac OS X 10.8 or later; Windows 7 or later
    For web app control: Mac, Windows, Linux, iOS, Android