QIO Series Network Audio Expanders

Q-SYS Network Mic/Line I/O Expanders

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The Q-SYS QIO Series network audio I/O expanders extend your Q-SYS system’s capabilities and enable streamlined interoperability with non-networked audio devices. By separating local I/O from processing hardware, the QIO Series offer modular and easily scalable network I/O to support your desired topology. There are three models that offer mic/line connectivity to integrate consumer or professional audio devices into your Q-SYS system.​​​​


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Features & Benefits

  • Native network audio I/O solution for Q-SYS
  • QIO-ML4i: Four (4) mic/line inputs
  • QIO-L4o: Four (4) line outputs
  • QIO-ML2x2: Two (2) mic/line inputs and two (2) line outputs
  • Professional, high performance mic/line level inputs (with +48 VDC phantom power) and/or line outputs
  • Microphone detection on inputs to enable monitoring, usage statistics and failure notifications
  • Power over Ethernet (PoE) capable or daisy-chain up to four QIO expanders on a single network run (with local daisy-chained DC power
  • Simple drag-and-drop integration and comprehensive management via Q-SYS Designer Software and Q-SYS Reflect Enterprise Manager
  • Surface- or rack-mountable (1RU, quarter width)
  • Includes surface mounting hardware
  • Professional mic/line connectivity where you need it: QIO Series network audio I/O expanders allows you to provide your Q-SYS system with greater flexibility to deploy mic/line audio connectivity where it’s most convenient. The network audio I/O expanders feature professional mic/line level inputs with +48 VDC phantom power and/ or line outputs to ensure high-performance and compatibility, along with microphone detection on inputs to enable monitoring, usage statistics and failure notifications. Additionally, each of the three models features a compact form factor that can be rack- or surface-mounted.
  • Expanded I/O customization: QIO Series is intended to present a simpler way to add network I/O connectivity to Q-SYS systems, decoupling the physical location of the I/O from processing hardware to support distributed or centralized processing architectures. Additionally, QIO Series lets you customize your I/O configuration, and compliments the strengths of newer Q-SYS Core models that were designed with fewer onboard I/O options (Core Nano, Core 8 Flex, or NV-32-H (Core Capable)).
Graphic showcasing daisy-chained QIO Series devices over an office space
  • Simplicity & scalability: Daisy-chain up to four of the QIO Series devices on a single network run (with local daisy-chained DC power) to consume fewer network ports, avoid rack clutter, and allow for quicker future expansion without pulling additional network cables. Alternatively, QIO Series are also PoE-capable, providing simple single cable connectivity (when devices aren’t daisy-chained).
  • Designed for Q-SYS: The QIO Series deliver native network I/O customization to Q-SYS, a cloud-manageable audio, video and control platform, built to deliver scalable, flexible AV solutions into the future. Learn more about Q-SYS.
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Specifications QIO-ML4i QIO-ML2x2 QIO-L4o
Connectivity Four (4) mic/line inputs Two (2) mic/line inputs and two (2) line outputs Four (4) line outputs
Mic/Line Inputs
Maximum input level +24 dBu -
Preamplifier gain range 0 dB to 60 dB -
Phantom power +48 VDC -
Equivalent Input Noise < -120 dBu, no weighting @ 20 Hz to 20 kHz -
Input to input crosstalk @ 1 kHz > 85 dB -
Input Dynamic Range
@ +24 dBu sensitivity > 105 dB -
@ +10 dBu sensitivity > 100 dB -
@ -10 dBu sensitivity > 95 dB -
@ -36 dBu sensitivity > 80 dB -
Input impedance 5 kΩ single-ended, 10 kΩ balanced -
Line Outputs
Output audio range level - -36 dBu to +24 dBu
Output dynamic range - 108 dB
Output to output crosstalk @ 1 kHz - > 85 dB
Output Impedance - 150 Ω to 300 Ω
Sample rate 48 kHz
Bit Depth 24 bit
Other Connectors
External power supply 24 VDC nominal, 2.5 A on Euro connector with second connector for daisy-chaining (QIO-PSU power supply sold separately)
LAN (PoE) Gigabit LAN connection for Q-LAN, PoE
PoE specification Conforms to IEEE 802.3af Type 1
LAN (Thru) Ethernet daisy-chaining
Dimensions 8.5 x 4.25 x 1.59 in (215.9 x 108 x 40.4 mm)
Weight 1.72 lb (0.78 kg
Mounting options Surface- and wall-mountable (hardware included)
Rack-mountable; 1RU, quarter-rack width (QIO-RMK rack kit sold separately)
Ambient operating temperature range 0°C to +50°C
Humidity 0% - 85% through 30°C, non-condensing
Storage temperature -20° to 70°C
Compliance FCC 47 CFR Part 15, IC ICES-003, CE (EN55032, EN55035), EU RoHS directive 2011/65/EU, WEEE directive 2012/19/EU, China RoHS directive GB/T26572, EAC, UL, C-UL, NOM-019

*All specifications are subject to change without notice.