Lexicon I-ONIX U22 2x2 USB 2.0 Desktop Recording Studio, 2009, made in USA

Link: lexiconpro | lexiconpro [Owner's Manual, PDF] | Mac OS X Core Audio Driver v3.3.11 for Mac OSX 10.8.5 - 10.14

SPECIFICATIONS:
Microphone Inputs: Female XLR Pin 2 Hot
Input Impedance: 3kΩ balanced
Phantom Power: +48 Volts
Maximum gain: +58 dB
E.I.N. (at max gain): -125 dBu @ 58dB gain typical (150ohm source)<nr> -129 dBu @ 58dB gain typical A-weighted (150&Omega; source)
Maximum Input Level: +21 dBu at minimum gain
Frequency Response: +0/-1 dB, 20Hz - 20kHz
THD+N:

- <0.006%, 20Hz - 20kHz (mic input to main output) 0 dBu input level, Input knobs at 11 o'clock
- <0.003%, 1kHz, +5 dBu input level, Input knobs at minimum, Output knob at max
Line Inputs: 1/4" TRS balanced or unbalanced
Input Impedance: 20kohm balanced, 13kohm unbalanced
Maximum Input Level: +32 dBu
Frequency Response: +0/-1.5 dB, 20Hz - 20kHz (reference 1kHz)
THD+N: <0.004%, 20Hz - 20kHz (line input to main output) 0 dBu input level, Input knob at 12 o'clock, Output knob at max
Instrument Input: 1/4" TS unbalanced
Input Impedance: 1M&Omega;
Maximum Input Level: +13 dBu
Frequency Response: +0/-2 dB, 20Hz - 20kHz (instrument input to main output)
THD+N: <0.004%, 20Hz - 20kHz, 0 dBu input level, Input knob at 10 o'clock, Output knob at max
Line Outputs: 1/4" TRS balanced or unbalanced
Level: >+18 dBu maximum
Impedance: 32ohm Balanced, 16&Omega; Unbalanced
Headphone Output: 1/4" stereo jack 350mW per channel at 50ohm
MIDI Interface: 5 pin DIN connectors for MIDI in and MIDI out (5 volt signal)
Sample Rate: 44.1, 48, 88.2, or 96 kHz (determined by computer application)
Dynamic Range:

- A/D (24 Bit) 108 dB typical, A-weighted, 20Hz - 20kHz
(44.1 kHz sample rate)
- D/A (24 Bit) 110 dB typical, A-weighted, 20Hz - 20kHz
- A/D/A (24 Bit) 102 dB typical, A-weighted, 20Hz - 20kHz
Power Requirements: 12W 9VAC