Q-SYS QIO-ML4I: 4 Mic/Line Input Daisy-Chainable Peripheral
Upgrade your Q-SYS system with the QIO-ML4I! This amazing device extends your system's capabilities and makes it a breeze to connect with non-networked audio devices. It separates local I/O from processing hardware, giving you modular and scalable network I/O for your ideal setup. With three models to choose from, you can easily integrate consumer or professional audio devices into your Q-SYS system.
Features & Benefits
- • Native network audio I/O solution for Q-SYS - Get seamless connectivity
- • QIO-ML4i: Four (4) mic/line inputs - Capture audio like a pro
- • Professional, high performance mic/line level inputs (with +48 VDC phantom power) and/or line outputs - Ensure top-notch audio quality
- • Microphone detection on inputs to enable monitoring, usage statistics and failure notifications - Stay in control
- • Power over Ethernet (PoE) capable or daisy-chain up to four QIO expanders on a single network run (with local daisy-chained DC power) - Save on network ports and expand easily
- • Simple drag-and-drop integration and comprehensive management via Q-SYS Designer Software and Q-SYS Reflect Enterprise Manager - Effortless setup
- • Surface- or rack-mountable (1RU, quarter width) - Fit it anywhere
- • Includes surface mounting hardware - No extra hassle
Professional mic/line connectivity where you need it: The QIO-ML4I gives your Q-SYS system the flexibility to add mic/line audio connectivity wherever it's most convenient. It has professional mic/line level inputs with +48 VDC phantom power and/or line outputs for high performance and compatibility. Plus, microphone detection on inputs helps with monitoring, usage stats, and failure alerts. And it comes in a compact form that can be rack- or surface-mounted.
Expanded I/O customization: The QIO Series makes it easy to add network I/O connectivity to your Q-SYS systems. It separates I/O location from processing hardware, supporting distributed or centralized processing setups. You can customize your I/O configuration and it works great with newer Q-SYS Core models with fewer onboard I/O options.
Simplicity & scalability: Daisy-chain up to four QIO Series devices on a single network run (with local daisy-chained DC power) to save network ports, reduce rack clutter, and expand quickly in the future without pulling more network cables. Or, use PoE for simple single cable connectivity when not daisy-chaining.
Designed for Q-SYS: The QIO Series offers native network I/O customization for Q-SYS, a cloud-manageable audio, video and control platform for scalable, flexible AV solutions.
Specifications
- Connectivity: Four (4) mic/line inputs
- 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
- 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
- General
- 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)
- Environmental
- 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.

The Q-SYS QIO-ML4I is perfect for audio setups. Whether you're a professional installer or a DIY enthusiast looking to enhance your audio system, this product is for you. It has four mic/line inputs, allowing you to connect various audio sources. With dimensions of 8.5 x 4.25 x 1.59 in (215.9 x 108 x 40.4 mm) and weighing 1.72 lb (0.78 kg), it's compact and easy to install. You can mount it on the surface or in a rack (1RU, quarter width). It offers great flexibility in integrating with your Q-SYS system, providing professional audio connectivity where you need it.