BASIS 922az™

The powerful BASIS hardware platform integrates control, monitoring, protection and processing of amplifiers and loudspeakers with configurable DSP and CobraNet™ digital audio transport via Ethernet: BASIS products are the core of the enabled products.


  • Amplifier and loudspeaker control, monitoring and protection
  • Configurable DSP functions and signal paths
  • Fixed latency DSP engine
  • Ethernet controllable
  • CobraNet audio transport with new intuitive GUI
  • Two Ethernet ports – CobraNet and control can be run over a single cable
    or be divided between the two ports. The CobraNet port is 100Base-T.
    The control port is 10Base-T.
  • Each unit can store eight design configurations that can be changed on the fly
  • Snapshots can recall config or block and/or parameter settings
  • THX approved
  • DSP functions include, but are not limited to:
  • Matrix mixer – any size, up to 24 x 24
  • Automixers – gain sharing
  • Routers – any size, up to 24 x 24
  • Gain controls – any channel count, up to 24
  • Graphic equalizers
  • Filters – high-pass, low-pass, all-pass, shelf, parametric, parametric shelf, Butterworth high and low-pass, Linkwitz-Riley high and low-pass, Bessel-Thomson high and low-pass
  • Crossovers – Linkwitz-Riley, Butterworth, Bessel-Thomson in-phase, Bessel-Thomson symmetrical, 2-way, 3-way, and 4-way general purpose adjustable
  • Compressors, peak limiters, AGC's, gates, dynamics processor
  • Duckers – up to 8 channels, up to 60 seconds fade in and fade out times, priority mix
  • Pink noise, white noise, sine generators
  • Delays
  • Macros – user-definable custom blocks with password protection


Dynamic range
(AES-17, -60 dB method, all sensitivities)
Unweighted > 115 dB > 112 dB 110 dB
A weighted > 118 dB > 115 dB 113 dB
Distortion (20 Hz - 20 kHz, all sensitivities)
+4 dBu (max) < 0.009% THD+N < 0.009% THD+N < 0.009% THD+N
2 dB below clip (max) < 0.009% THD+N < 0.009% THD+N < 0.009% THD+N
Crosstalk (20 Hz - 20 kHz)
Inter-channel (max) > 75 dB
Inter-channel (typ) > 90 dB
Intra-channel (max) > 85 dB
Intra-channel (typ) > 100 dB
Frequency response
20 Hz - 20 kHz (max) +/- 0.5 dB
20 Hz - 20 kHz (typ) +/- 0.2 dB
Audio converters 24 bit, 48 kHz, in and out
Mute Infinite attenuation
Delay Standard CobraNet™ latency Low Latency
BASIS to Network
Analog input through full DSP chain to CobraNet output
7.104 milliseconds 4.438 milliseconds
Network to BASIS
CobraNet input through full DSP chain to analog output
6.313 milliseconds 3.646 milliseconds
Analog input through full DSP chain, over CobraNet network, through full DSP chain, to analog outputs
8.083 milliseconds 5.417 milliseconds
BASIS in stand-alone mode
Analog input through full DSP chain to analog outputs
2.354 milliseconds (default group delay)  


Program inputs 8 inputs
Connector type 3-pin "phoenix style" (a.k.a. "euro style") detachable terminal blocks
Type Electrically balanced
Grounding All shield terminals connected to chassis
Pinout 1:+ 2:- 3:CHASSIS GND
Input impedance (nom.) Balanced: 10k ohms Unbalanced: 10k ohms
Common-mode rejection 20 Hz - 20 kHz (min.): > 54 dB, 20 Hz - 20 kHz (typ.): > 60 dB
Input sensitivities (variable) Vrms: 1.5, 3, 9, 18 dBU: 5.7, 11.8, 21.3, 27.3 dBV: 3.5, 9.5, 19.1, 25.1
Program outputs 8 outputs
Connector type 4 HD-15 DataPort connections
Cable type QSC DataPort cable, QSC p-n DPC-x ("x" designates cable length in feet)
Available "stock" lengths 1, 2, 3, 4, 5, 6, 10, and 20 ft., custom lengths available
Maximum qualified length 328 ft. (100 m) using QSC DP cable only. Non QSC cable limited to 6 ft. (audio only)


Control room foldback monitoring
Connector type 5-pin "phoenix style" (a.k.a. "euro style") detachable terminal blocks
Pinout 1:+(input) 2:-(input) 3:CHASSIS GND 4:-(output) 5:+(output)
Tap points 8 internal input, 8 internal output, 8 amplifier (pre-, post-, amplifier) software selectable
Monitor input
Monitor signal (unit off) Unity gain connection, relay bypass
Maximum level +21 dBu
Impedance (nominal) 10k ohms
CMRR, 20 Hz - 20 kHz > 54 dB
Monitor output
Monitor Sum of monitor input and signal from internal monitor tap point(s)
Freq. resp. (20 Hz - 20 kHz) +/- 0.5 dB
Distortion (20 Hz - 20 kHz) < 0.05% @ +4 dBu
Noise floor > 90 dB
Output impedance (nom) 100 ohms
Output load (min) 600 ohms
Monitor level
Control range (nom) 0 dB to -95.5 dB in 0.5 dB steps


Relay outputs 2 discrete floating relay switch outputs
Connector type 3-pin "phoenix style" (a.k.a. "euro style") detachable terminal blocks
Configuration Electromechanical relay
Pinout 1:NC 2:NO 3:COM
Switching capacity (nom) 1A 30 VDC
Logic outputs 4 discrete outputs
Connector type 2-pin "phoenix style" (a.k.a. "euro style") detachable terminal blocks
Configuration Single-ended, TTL compatible
Pinout 1:+(Signal) 2:-(CHASSIS GND)
Omni inputs 6 discrete inputs for TTL logic, voltage control or passive resistance
Connector type 2-pin "phoenix style" (a.k.a. "euro style") detachable terminal blocks
Configuration Single-ended, ground referenced
Pinout 1:+(Signal) 2:-(CHASSIS GND)
Normal operating range Reads signals between 0-5 V nominally
Potentiometer operation Use 10k ohms for full range
Voltage tolerance +/- 48 V
Current output 0.5 mA with 10k pot (for passive resistive controls)
RS-232 port Female DB9 connector (setup and diagnostics purposes only)
QSControl port Neutrik Ethercon RJ45 ruggedized data connector
CobraNet port Neutrik Ethercon RJ45 ruggedized data connector
QSControl status Yellow Link, Tx, Rx, front panel Green Link, Tx, Rx, rear panel
CobraNet status Yellow Link, Tx, Rx, front and rear panel
Power Blue, front panel
Diagnostic Red, front panel
DataPort status (port) Tri-state (red, green, yellow), front panel
LCD data display 2 line x 16 character, backlit, front panel


Dimensions (HWD) inches 1.72 (1RU) x 17.13 x 14.84
Dimensions (HWD) mm 43.6 x 435.6 x 376.9
Weight 10.6 lbs / 4.8 kg

Specifications subject to change without notice is a trademark of QSC Audio Products, LLC
THX is a trademark of THX, Ltd.
CobraNet is a trademark of Cirrus Logic, Inc