Product Specification Sheet APS698

Rev. 11/2015

MXA333 QwikBUS™ Intelligent Audio Mixer Unit

Architects' And Engineers' Specifications

The intelligent audio mixer(s) shall be Alpha Communications® / S.T.R.™ QwikBUS™ model MXA333, or approved equal. The MXA333 shall be built into a rugged high impact ABS plastic case, and shall be used with the associated SP333 intelligent controller (and associated SNT333 power supply and C333-2 connecting cable) for up to 100 QwikBUS™ audio stations (25 per line maximum). Contractor shall furnish the proper number of MXA333 and SP333 units (and related components), depending upon system capacity.

Low voltage wiring shall be used and positive screw terminal and plug-in connectors shall be provided for installation wiring. The MXA333 shall be mountable right to the surface of the wall or in a customer supplied junction box cabinet.

Contractor shall observe all local and national electrical and building codes.

MXA333 Audio Type Intelligent Mixer

The Alpha Communications® / S.T.R.™ MXA333 intelligent mixer is used only with the QwikBUS™ series intercom systems for systems with more than 100 addressable QwikBUS™ audio stations. The MXA333 provides the intelligent circuitry needed to install multiples of 100 QwikBUS™ stations, allowing systems with very large system capacities.

Each MXA333 gets its power from its associated SP333 intelligent controller and corresponding SNT333 power supply. All MXA333 field connections are positive screw terminal type, or plugin type. Each MXA333 requires the SP333 and SNT333, and C333-2 connecting cable assembly.

  • Easily Installs Right on Finished Wall Surface or in Optional Junction Box
  • Operates on Safe Low-Voltage Class II Wiring
  • Positive Screw Terminal Connectors
Dimensions: Height: 3.75" (96mm)
Width: 4.25" (108mm)
Depth: 2.375" (61mm) from mounting surface
Construction: High impact Grey ABS plastic case
Connections: Positive screw terminal connectors
Temperature Range: 0°C - 50°C
Mounting: Surface-mounted (usually installed near the system amplifier/power supply and other system central equipment).
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Due to continuous product improvement, all colors, sizes, materials, finishes and specifications are subject to change without notice.