6
Introduction
The Q-SYS QIO Endpoints Series offers multiple products that can serve numerous audio and control purposes.
ML4i
The Q-SYS ML4i is a network audio endpoint native to the Q-SYS Ecosystem, serving as a mic/line input that enables network-based audio 
distribution. The compact form factor includes surface mounting hardware permitting discreet and strategic mounting while an optional rack 
kit fits one to four devices into a standard 1U nineteen-inch format. The four-channel granularity locates the right amount of analog audio 
connectivity in desired locations without bulk or waste. Up to four devices may be daisy-chained off one access switch port, provided 24 
VDC power is available. Alternatively, each may be individually powered over Ethernet.
L4o
The Q-SYS L4o is a network audio endpoint native to the Q-SYS Ecosystem, serving as a line output that enables network-based audio 
distribution. The compact form factor includes surface mounting hardware permitting discreet and strategic mounting while an optional rack 
kit fits one to four devices into a standard 1U nineteen-inch format. The four-channel granularity locates the right amount of analog audio 
connectivity in desired locations without bulk or waste. Up to four devices may be daisy-chained off one access switch port, provided 24 
VDC power is available. Alternatively, each may be individually powered over Ethernet.
ML2x2
The Q-SYS ML2x2 is a network audio endpoint native to the Q-SYS Ecosystem, serving as a mic/line input, line output device, that enables 
network-based audio distribution. The compact form factor includes surface mounting hardware permitting discreet and strategic mounting 
while an optional rack kit fits one to four devices into a standard 1U nineteen-inch format. The four-channel granularity locates the right 
amount of analog audio connectivity in desired locations without bulk or waste. Up to four devices may be daisy-chained off one access 
switch port, provided 24 VDC power is available. Alternatively, each may be individually powered over Ethernet.
GP8x8
The Q-SYS GP8x8 is a network control endpoint native to the Q-SYS Ecosystem, providing General Purpose Input/Output (GPIO) 
connections that allow the Q-SYS network to interface with miscellaneous outside devices, such as LED indicators, switches, relays, and 
potentiometers, and with custom or third-party controls. The compact form factor includes surface mounting hardware permitting discreet 
and strategic mounting while an optional rack kit fits one to four devices into a standard 1U nineteen-inch format. Up to four devices may 
be daisy-chained off one access switch port, provided 24 VDC power is available. Alternatively, each may be individually powered over 
Ethernet.
Power Requirements
The Q-SYS QIO Series offers a flexible power solution that allows the integrator to choose to use either a 24 VDC power supply or an 
802.3af Type 1 PoE PSE. With either power solution, you must follow the safety instructions for the specific power supply or injector chosen. 
For details on the 24 VDC or PoE power supply requirements, refer to the product specifications.
  WARNING: To avoid the risk of electric shock, this equipment must only be connected to a supply mains with protective earth 
when using class I power supply.
Power over Ethernet (PoE)
  NOTE: A device cannot provide daisy-chained power to an external device with Power over Ethernet. An external 24 VDC supply 
is required for power daisy-chaining applications. A device can provide Ethernet daisy-chaining with either power source.
24VDC External Supply and Daisy-Chained Devices
  NOTE: When using the FG-901527-xx accessory power supply, up to four (4) devices may be powered.