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dbx AFS 224 - Two Channel Advanced Feedback Suppression Processor

B&H # DBAFS224 Mfr # AFS 224
In Stock
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You Pay: $159.00

The AFS 224 Advanced Feedback Suppression processor from dbx is a stereo/dual channel feedback eliminator, designed to provide state-of-the art processing while maintaining a simple and intuitive control interface. From the powerful DSP module to the user interface, the unit provides all the processing and control necessary for both installation and live use.

Although ten and twelve filter processors are generally accepted as standard, the AFS 224 offers up to twenty-four filters per channel with filter Qs up to 1/80 of an octave. AFS uses Precision Frequency Detection and state-of-the-art processing to determine the exact portions of a given frequency that is causing feedback without removing approximately half of the signal power.

Additional key features include "Fixed" and "Live" modes of operation, as well as the unit's "Filter Lift" capabilities. Live mode continuously updates filter placement as feedback appears from various sources, providing flexibility during a performance. Fixed mode keeps the initially-set filters in place. The Filter Lift feature automatically removes filter assignments that are no longer necessary, which in turn maximizes sonic integrity.

dbx's Advanced Feedback Suppression (AFS) technology
Twenty-four programmable filters per channel
Application-specific filter types include Speech and Music Low, Med and High
Stereo or dual independent channel processing
Live and fixed filter modes with selectable filter lift times
Input channel and 24 LED per channel filter metering
Filter Type Application-specific filters
Frequency Bands 24
Bandwidth 1/5th, 1/10th, 1/20th and 1/80th octave
Number of Channels 2
Inputs 2 XLR (2-pin hot)
1 x 1/4" TRS phone
Outputs 2 XLR (2-pin hot)
1 x 1/4" TRS phone
Maximum Input Level +20dBu
Maximum Output Level +20dBu
Frequency Response 20Hz to 20kHz, +/-0.5dB
Dynamic Range >109dB, A-weighted
>106dB, unweighted, 22kHz bandwidth
Noise Not specified by manufacturer
Dimensions (WxDxH) 1U 19" rack-mount
Weight Not specified by manufacturer
Specialties 24-bit/48kHz internal conversion
dbx AFS 224 - Two Channel Advanced Feedback Suppression Processor
  • AC Power Cable
  • Two (2) Year Warranty to Original Purchaser

    by PowerReviews
    dbxAFS 224 Feedback Suppression Processor

    (based on 1 review)

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    Reviewed by 1 customer

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    (2 of 2 customers found this review helpful)


    Great Unit!

    By Barry Cahill

    from Valley Center, CA

    About Me Professional Musician

    Verified Buyer


    • Easy To Use
    • Professional Functions


      Best Uses

      • Performances

      Comments about dbx AFS 224 Feedback Suppression Processor:

      The AFS 224 works just like they said it would. I use it with a Mackie 1604 VLZ board in between the monitor send and the monitor amp. At times, it does take a few moments to "ring out" a problematic room, but it ALWAYS finds the troublesome frequencies, and dials them down.

      BTW, I called tech support at DBX to clarify a few things in the user's manual, got right through, and received very clear pointers from the help desk guy. I would recommend this unit to anyone who has monitor feedback problems.

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