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Stewart Audio FLX80-4-LZ
Rack-Mountable 80W x 4-Channel DSP-Enabled Analog Amplifier @ 4 Ohms


The Stewart Audio FLX80-4-LZ is part of their FLX (pronounced FLEX) Series of amplifiers, the most versatile 1/2-rack amplifier series Stewart has ever produced.
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List Price: $1,449.00
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Stewart Audio FLX80-4-LZ
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The Stewart Audio FLX80-4-LZ is part of their FLX (pronounced FLEX) Series of amplifiers, the most versatile 1/2-rack amplifier series Stewart has ever produced. The FLX80-4-LZ delivers 80 watts from each of its (4) four output channels into a 4 Ohm load. At its heart there's a powerful internal full-function DSP that's engineered to solve a multitude of your audio problems, all in just one enclosure. The DSP includes a full cross-point mixer, EQ, filters, limiters, and much more. A USB port provides simple, quick, and repeatable programming when used in large installations. Its RVC and RS232 control allows volume control from a wide array of devices. You will not find a more versatile combination of power output and processing in a comparable package on the market today.


  • Hospitality Installations
  • Classrooms
  • Conference Rooms
  • Houses of Worship
  • Room combining

Stewart Audio FLX80-4-LZ Features:

  • Onboard DSP for signal routing and filtering
  • USB and RS232 available for configuration
  • 1/2-rack package
  • (4) analog inputs (4 line/mic; 2 with phantom power)

Stewart Audio FLX80-4-LZ Specifications:

  • Output Power: 80W x 4 @ 4 Ohms 
  • Frequency Response (+0, -3dB): 20 Hz—20 kHz
  • THD+N: <0.05% @ 6dB below clipping
  • Signal-to-Noise Ratio: >95dB
  • Input Sensitivity: 1V (0 dBV)
  • Input impedance (Balanced/Unbalanced/Phantom): 7.2 kOhms/3.6 kOhms/2.4kOhms
  • Current Draw - Standby, 1/8 Power: 12W, 65W
  • Amplifier Class: D
  • Remote Volume: 0-10V
  • Channel to Channel Isolation: >60dB
  • Input Connectors: 3.5mm Euroblock; 24V Phantom Power on 2 channels
  • Output Connectors: 5mm Euroblock
  • LED Indicators: Power
  • Controls: USB & RS-232
  • Power Supply Input: 100-240 VAC 50/60Hz (PFC Universal Input)
  • Construction: Aluminum Chassis
  • Mounting: Rack-mountable, single & dual
  • Cooling: Convection–Cooling (No Fans)
  • Dimensions (HxWxD): 1.7" x 8.3" x 11.25" (44 x 212 x 272mm)
  • Weight: (approx.) 6.2 lbs (2.8kg) (max - varies by model)
  • Warranty: 3 years

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