Loyola Enterprises

A veteran and minority owned SDB Certified Business.



757.498.6118 Ext - 109DBX AFS 224 - Call for pricing - Feedback Suppression


PDFDBX AFS 224 Cut Sheet (pdf)

PDFDBX AFS 224 Manual (pdf)

PDFDBX AFS 224 Quick Start Guide (pdf)

PDFAFS White Paper (pdf)

The AFS™ 224 Advanced Feedback Suppression processor was designed to provide state-of-the art feedback elimination processing, while maintaining a simple and intuitive control interface. From the powerful DSP module to the no-nonsense user interface, the AFS 224 provides all the processing and control necessary for both installation and live use. The AFS 224 is an absolute must for any live sound application.

Ten and twelve filter feedback elimination processors have become the de facto standard, but the engineering staff at dbx have never been quite content residing in the neighborhood of the status quo. So, to raise the bar once again, they went out and developed a dedicated feedback suppression processor that offers up to 24 filters per channel with filter Qs up to 1/80 of an octave. To achieve these staggering numbers dbx utilized their patent-pending AFS™ technology that had previously only been available in the upper echelon line of products and made it available in this stand-alone processor, which takes all of the guesswork out of feedback removal. In addition to the plethora of feedback suppression filters available, the AFS 224 also offers selectable modes, live filter lift, and types of filtration, which are all readily available via the intuitive user interface front panel.


  • dbx’s Patent-pending (Advanced Feedback Suppression) AFS™ technology
  • 24 Programmable Filters per Channel
  • Stereo or Dual Independent Channel Processing
  • Live and Fixed Filter Modes
  • Selectable Filter Lift Times
  • Application-specific filter types include: Speech and Music Low, Med and High
  • Input channel Metering
  • 24 LED per Channel Filter Metering
  • XLR and TRS Inputs and Outputs

Analog Inputs
Number of Inputs 2 Total
Input Connectors Female XLR and ¼" TRS
Input Type Electronically balanced/unbalanced, RF filtered
Input Impedance (bal./unbal.) >50 kΩ / >25 kΩ
Max. Input Level +20 dBu
Input CMRR >40 dB, typ >55 dB @ 1 kHz
Analog Outputs
Analog Outputs 2 Total
Output Connectors Male XLR and ¼" TRS
Output Type Electronically balanced/unbalanced, RF filtered
Output Impedance (bal./unbal.) >120 Ω / >60 Ω
Max. Output Level +20 dBu
A/D Performance
Type dbx Type IV conversion system
Dynamic Range (A-weighted/unweighted) >113 dB / >110 dB
Type IV Dynamic Range (A-weighted/unweighted) >119 dB / >117 dB
A/D Conversion 24-bit
Sample Rate 48 kHz
D/A Performance
Dynamic Range (A-weighted/unweighted) 112 dB / 109 dB
D/A Conversion 24-bit
System Performance
Dynamic Range (A-weighted/unweighted) >109 dB / >106 dB
THD+Noise @ 1 kHz 0.003% typ. @ +4 dBu
Frequency Response (±0.5dB) 20 Hz–20 kHz
Interchannel Crosstalk >80 dB
Operating Voltage 100-240 VAC, 50/60 Hz
Power Requirements 9 Watts
Safety Certifications UL 60065, IEC 60065, E 60065, EN 55013
For pricing options and packages, contact us at
757.498.6118 Ext - 109, Or