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Alesis iO4 4-Channel 24-Bit Recording Interface

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The iO4 packs power and function into a compact package. No matter which recording software you like, how many microphones and preamps you have, or how large your library of plug-ins and VSTs, you nee... Click To Read More About This Product

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The iO4 packs power and function into a compact package. No matter which recording software you like, how many microphones and preamps you have, or how large your library of plug-ins and VSTs, you need a way to get audio into your computer.

Compact Connectivity
The iO4 is a compact audio-recording interface for home, project and portable studio recording setups. This four-channel USB device for Mac and PC-based systems enables users to record and monitor up to eight channels of audio (four in and four out) in 16-bit mode or four channels (two in, two out) in 24-bit mode. The iO4 is compact to comfortably fit into a mobile recording rig, laptop bag or backpack, yet contains high-quality components and circuitry suitable for the studio.

Professional I/O
The iO4 has four input channels, each having an XLR microphone input, a 1/4-inch TRS insert for external effects units and a 1/4-inch TS jack that works with line-level sources and can accommodate direct connection of guitars. The iO4 features discrete-design preamplifiers and 48-volt phantom power on each of its four input channels as well for use with virtually all microphones and audio sources.

Producers and musicians will appreciate the ability to connect a second pair of reference monitors or route audio to external effects processors using iO4's four available output channels. For remote tracking and alternative playback, the iO4 has a 1/4-inch TRS headphone output.

Premium A/D and D/A
High quality analog-to-digital and digital-to-analog converters ensure that every detail of each session or performance gets captured and played back faithfully. The iO4 features MIDI In and Out jacks for playing and controlling software with keyboard and pad controllers, workstations, and other MIDI-compatible instruments.

The iO4 sends and receives eight audio channels on a single USB cable for simple, universal interface to a computer. The USB interface is class compliant for plug-and-play operation with Mac OS X and Windows XP, Vista and 7.

Complete Solution
The iO4 comes complete with a copy of Steinberg Cubase LE digtal audio workstation (DAW) software. Cubase is one of the most popular DAWs in the world thanks to its intuitive approach to composing, recording, editing and mixing. In addition to the included software, the iO4 is compatible with virtually all audio and MIDI software.


  • Four-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
  • Tricolor stereo level meter and lighted status indicators for visual monitoring
  • MIDI Input and Output jacks for playing and controlling software with instruments
  • Inputs
    4x XLR and 1/4", mic/line/guitar level
    switchable phantom power
    discrete-design preamplifiers
  • Outputs
    2x 1/4" main
    1/4" TRS headphone
  • USB: 4 in, 4 out (max)
  • Resolution: 24-bit, 48 kHz (max)
  • Metering: tricolor stereo LED tree
  • Control: MIDI in, MIDI out, USB
Pro Coverage
Manufacturer's Warranty
One year parts and labor warranty on all keyboards, DAT, and modules.
One year or 1500 hour warranty (whichever comes first) on tape heads.
Custome must register purchase online to receive customer registration number and warranty.
(No warranties are sent with product.)

Customer Reviews

Review Snapshot

by PowerReviews
AlesisiO4 4-Channel 24-Bit Recording Interface

(based on 2 reviews)

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Reviewed by 2 customers

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(2 of 2 customers found this review helpful)


Not as advertised/marked.


from CA

Comments about Alesis iO4 4-Channel 24-Bit Recording Interface:

Purchased this "24-bit" interface, at least that's what the website and product box said. Come to find out the unit will not do all 4 channels at 24-bit, only two. You can record 4 channels at 16-bit, but that's not what I believed I purchased. Very misleading packaging and website. Not able to find this fact on website or in limited product documentation available, Alesis really dropped the ball (or intended to mislead). Available quality is good, good headphone amp.

(1 of 2 customers found this review helpful)


To use with a DAW

By Terry Davis _ _

from Saint David, AZ

Comments about Alesis iO4 4-Channel 24-Bit Recording Interface:

The setup instructions leave a lot to be desired. After trying 5 times to get my electic guitar input into all three of my DAW programs including CuBase using the USB connection, I have given up. The signal being sent through the USB connection sounds like serious feedback caused by too much gain. That is with all the controls zeroed. Adjusting any of them does not solve the problem. I have also downloaded several different ASIO drivers to correct the problem but nothing works. I am still wondering what the Midi In and Out connections are supposed to do since this is not explained.

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