The Alesis iO2 Express is a compact, audio-recording interface for home studios and portable recording setups. This two-channel USB device for Mac and PC-based systems enables you to record at up to 24-bit resolution for input into virtually all DAW, recording, and performance software.
 

The Alesis iO2 Express is small enough to comfortably fit into your mobile recording rig, laptop bag, or backpack, yet contains high-quality components and circuitry suitable for the studio.

The Alesis iO2 Express Features:

* Two-channel computer audio recording interface
* Record up to 24-bit, 48 kHz audio into virtually any software
* Monitor sessions with balanced studio monitor and headphone outputs
* High-quality A/D and D/A converters, discrete-design preamps, 48V phantom power
* Inputs for microphones, line-level sources, and instruments including guitars
* Tricolour stereo level meter and lighted status indicators for visual monitoring
* MIDI Input and Output jacks for playing and controlling software with instruments
* USB bus powered - no external power supply needed

FREQUENCY RESPONSE:

* MIC/LINE IN to SPDIF/USB OUT: +/-0.1dB Input Gain = minimum
* MIC/LINE IN to MAIN OUT (through ADC/DAC) +/-0.35dB Input Gain=minimum


SIGNAL-TO-NOISE RATIO (SNR):

* MIC/LINE IN (balanced) to INSERT OUT: 110dB A-weighted, input impedance at XLR or 1/4" jack = 600 Ohms, Input Gain = minimum
* GUITAR IN (unbalanced) to INSERT OUT: 99dB A-weighted, input impedance at 1/4" jack = 600 Ohms, Input Gain = minimum
* MIC/LINE IN (balanced) to SPDIF/USB OUT: 99dB A-weighted, input impedance at MIC or LINE jack = 600 Ohms, Input Gain = minimum
* GUITAR IN (unbalanced) to SPDIF/USB OUT: 94dB A-weighted, input impedance at 1/4" jack = 600 Ohms, Input Gain = minimum
* MIC/LINE IN (balanced) to MAIN OUT (through ADC/DAC): 97dB A-weighted, input impedance at MIC or LINE jack = 600 Ohms, Input Gain = minimum
* MIC/LINE IN (balanced) to MAIN OUT (through direct monitor): 95dB A-weighted, input impedance at MIC or LINE jack = 600 Ohms, Input Gain = minimum


TOTAL HARMONIC DISTORTION + NOISE (THD+N):

* MIC/LINE IN (balanced) to INSERT OUT: <0.001% Input Gain = minimum, 1KHz input signal, INSERT OUT = 5.7dBV
* GUITAR IN (unbalanced) to INSERT OUT: 0.034% Input Gain = minimum, 1KHz input signal, INSERT OUT = 5.3dBV
* MIC/LINE IN (balanced) to SPDIF/USB OUT: 0.003% Input Gain = minimum, 1KHz input signal, DIGITAL OUT = -0.3dBFS
* GUITAR IN (unbalanced) to SPDIF/USB OUT: 0.034% Input Gain = minimum, 1KHz input signal, DIGITAL OUT = -0.7dBFS
* MIC/LINE IN (balanced) to MAIN OUT (through ADC/DAC): 0.005% Input Gain = minimum, 1KHz input signal, MAIN OUT = 5.6dBV
* MIC/LINE IN (balanced) to MAIN OUT (through direct monitor): 0.006% Input Gain = minimum, 1KHz input signal, MAIN OUT = 5.6dBV