dbx AFS224 User manual

8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
Int’l Fax [phone]
[email protected]
http://www.dbxpro.com
A Harman International Company
18-6397 -A 5/03
224
AFS
™
Advanced Feedback Suppression
®
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 content residing in the neighborhood of the sta-
tus 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 technol-
ogy that had previously only been available in the upper echelon line of products and made
it available in this stand-alone processor. 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. For more informa-
tion please visit: www.dbxpro.com.
• 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; Music
Low, Med and High
• Input Channel Metering
• 24 Segment Filter Metering per
Channel
• XLR and TRS Electronically
Balanced Inputs
and Outputs

Analog Inputs:
Number of Inputs: 2
Connectors: Female XLR and 1/4”TRS
Type: Electronically balanced/unbalanced,RF filtered
Impedance: Balanced 50kΩ, Unbalanced 25kΩ
Max input line level: +20dBu
CMRR: >40dB,typically >55dB @ 1kHz
Analog Outputs:
Number of Outputs: 2
Connectors: Male XLR and 1/4”TRS
Type: Electronically balanced/unbalanced,RF filtered
Impedance: Balanced >120Ω, unbalanced >60Ω
Max Output Level: +20dBu
A/D Performance:
Type: dbxType IV conversion system
Dynamic Range: >113 dB A-weighted, >110 dB unweighted,22kHz BW
Type IV dynamic range: >119 dB,A-weighted, 22kHz BW
>117 dB, unweighted, 22kHz BW
A/D Conversion: 24 bit
Sample Rate: 48kHz
D/A Performance:
Dynamic Range: 112 dB A-weighted, 109dB unweighted
D/A Conversion: 24 bit
System Performance:
Dynamic Range: >109dB A-weighted, >106 dB unweighted,22kHz BW
THD+N: 0.003% typical at +4dBu, 1kHz
Frequency Response: 20Hz – 20kHz, +/- 0.5dB
Interchannel Crosstalk: >80dB typical
Crosstalk input to output: >80dB
OperatingVoltage: 100VAC 50/60Hz, 120VAC 60Hz and 230VAC 50/60Hz
Power Consumption 9Watts
Safety Agency Approvals:
UL 6500, IEC 60065, EN 55013, E 60065
AFS
Advanced Feedback Suppression
™
224
dbx engineers are constantly working to improve the quality of our products. Specifications are, therefore subject to change without notice.
FOR MORE INFORMATION CONTACT:
dbx Professional Products
8760 S. Sandy Pkwy.
Sandy, Utah 84070
Phone [phone]
Fax [phone]
[email protected]
http://www.dbxpro.com
A Harman International Company
The Professional’s Choice In Signal Processing™