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Poly MDA524 QD Audio Processor



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MDA524 QD Computer & Desk Phone Switch:

  • One headset for desk phone & softphone / VoIP
  • Easily transition into Unified Communications
  • USB-A or USB-C options
  • Independent volume and mute and call answer/end controls
  • Quick-Disconnect lets you unplug and walk away
  • Same Day Shipping On In Stock Items
  • Warranty 2-Years
  • 30-Day Returns
  • Latest Date Codes

Poly MDA524 QD Amplifier for H-Series Headsets:

The Poly MDA524 QD audio processor seamlessly integrates mixed call environments and makes it easy for CSRs to provide a better customer experience. Independent volume and mute controls allow for audio channel mixing to improve customer experience because customers can hear and be heard clearly. Plantronics Manager Pro also lets IT easily manage audio device deployment from the cloud and understand system performance with multiple metrics. Refer to Plantronics Manager Pro supported devices for full details (Plantronics Manager Pro subscription required).

Wired Headset Amplifier for PC & desk phone


  • Allows customer service representatives to take calls on desk phones or softphones
  • Supports Plantronics standard Quick Disconnect (QD) headsets, Plantronics digital QD headsets and Y-training cables
  • Two models available: MDA524 QD for Plantronics standard 4 pin QD headsets and MDA526 QD for Plantronics digital 6 pin QD headsets
  • Comprehensive desk phone compatibility with electronic hook switch (EHS) integration (available separately)
  • Superior noise and echo cancellation

Poly MDA524 QD Benefits:

  • One headset for desk phone and PC calls or applications
  • Manage your audio from one simple-to-use device
  • Easy-to-use buttons
  • Visually see your microphone mute button and call status indicators
  • Independent volume and mute and call answer/end controls
  • Superior noise and echo cancellation
  • 4-Pin Quick-Disconnect Cord allows you to walk away from your desk
  • Compatible with any Plantronics H-Series headset
  • Desk phone compatibility with electronic hook switch (EHS) integration
  • USB-A or USB-C cable
  • 2-Year Warranty
  • Part # MDA524 QD-A (USB-A) MDA524 QD-C (USB-C)
  • SKU # 212164-01 (USB-A) 212174-01 (USB-C)
  • UPC: 017229164239 (USB-A) 017229164253 (USB-C)


  • FREE technical support with purchase
  • Need help?  Call us and talk to a Real Person

What comes in the box:

  • Audio Processor
  • 4-Pin Quick Disconnect cable
  • Telephone Interface cable (86007-01)
  • USB-A or USB-C Cable
  • Quick start guide

Poly MDA524 QD Audio Processor Compatibility Settings:

Compatibility Slide Switch: The bottom of the Poly MDA524 QD Audio Processor has a slide switch with letters A-F. Research your phone’s natural Direct Connect Cable for correct compatibility setting.

A = U10
B = A-10
C = U10P
E = U10P-S

Additional information




Computer USB-A, Computer USB-C, Desk Phone

USB Connection Type


Part #

212164-01 (USB-A), 212174-01 (USB-C)


017229164239 (USB-A), 017229164253 (USB-C)


Same Day Shipping On In Stock Items


30-Day Returns




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