AFW-1
Anti-Feedback
Workstation
tm
Equalizer, Peak Limiter, FBX Feedback Suppression
http://www.arx.com.au
Tuning a live sound system, whether it’s a concert or a conference or all points in between, is a complex procedure at the best of times! Simply stopping feedback is only a part of it - you still need to adjust the actual sound of the system in the room.
In the ideal world you’d have an equalizer to set the system curve, something to eliminate feedback, and something else to keep the system level under control.
So, we’d like to introduce you to the
ARX contribution to the ideal world the all-new ARX AFW-1 Anti Feed- back Workstation.
A super accurate 30 band graphic equalizer, with up to ± 10dB of cut and boost, a fast, smooth sounding peak limiter, plus onboard genuine FBX
Feedback Exterminator circuitry.?
Want total control over everything?
You’ve got it.
Want automatic feedback locating
and suppressing? You’ve got that too.
Want a safety valve that’ll keep your
system in one piece? You’ve got that as well. All integrated into one 2 RU package, all designed to work with each other, and with you.
Operation of the AFW-1 is simplicity itself. Just use the EQ section to set the curve you require, press the switch in the anti feedback section for 4 seconds, and start pushing up the level.
That’s all there is to it. When you’re happy with the way things sound, set the limiter Threshold at the appropriate level, and start mixing.
If the system is in a fixed installation, simply power everything down when you’ve finished. The AFW-1 remembers your anti-feedback settings next time it is used - there’s no need to reset the circuit when it is turned back on. And if you forget the instructions, we’ve printed them on the lid for you!
The ARX AFW-1 Anti Feedback
Workstation has an application for every mode of live audio: Monitors,
Front of House, Church installations,
TV audience monitors, Conferences; in fact, anywhere there’s a live microphone, there’s a need for the AFW-1.
Features
þ
Automatic Feedback control
þ
Genuine FBX
Feedback Exterminator
þ
30 band Graphic
Equalizer
þ
Fast, smooth
Output limiter
þ
Intuitive, 'user friendly' layout
þ
Ultra low noise
‘Constant Q’ circuitry
þ
Balanced Inputs and Outputs on
XLR and Jack connectors
þ
Audio Ground lift switch on rear
þ
Flawless performance in any audio environment
þ
Security cover available
AFW-1
Specifications
Input
40 K Ohm Balanced
20 K Ohm Unbalanced
Output
300 Ohm Balanced
150 Ohm Unbalanced
Nominal Operating Level
0 dB
Maximum Input Level
+20 dB
Maximum Output Level
+20 dB EQ section only
+10 dB FBX in
Signal to Noise Ratio
86 dB A Weighted
EQ section only
98 dB Unweighted
Distortion
0.004% EQ section only
0.02% FBX in measured@ 1 KHz, +4dB
Frequency Response
20 Hz to 20 KHz, ±0.5 dB
Equalizer Filters
30 x Constant Q on standard ISO frequencies
FBX Filters
6 fixed, 3 dynamic
FBX Clip Indicator
Amber LED
FBX Filter Range
51Hz to 17 KHz
FBX Filter Width
1/5th or 1/10th octave
Switchable; refer manual
FBX Filter Depth
0dB to 40dB
FBX Filter Reset Time
4 seconds
Peak Limiter Threshold
Variable 10 dB to +10 dB
Limiter Status Metering
Red LED: Limiter Active
AC requirements
100120, 220240 VAC,
50-60Hz, 18 VA
Size
482 x 88 x 230 mm
19W x 3½H x 9D
Front Panel
30 smooth, centre grounding sliders per channel, on standard ISO frequencies
Reset control for Feedback Exterminator circuitry
Clip LED indicates imminent clipping, monitored at all vital stages through the AFW-1
Rear Panel
Balanced Input and Output TRS sockets. Tip
+ HOT, Ring COLD, Sleeve GROUND
Balanced Input and Output XLR connectors.
Pin 2 + HOT, Pin 3 COLD, Pin 1 GROUND
Your ARX dealer is:
Active/Bypass switch for Feedback Exterminator, Limiter and Output level controls
Limiter Threshold and Limit LED
Hardwire Active/Bypass switch for unit
Power LED indicates AFW-1 is connected to
AC power
Feedback Exterminator filter width switch
Audio Ground Lift switch
IEC 3 pin AC connector and integral fuseholder.
Architects and
Engineers Specifications
The Workstation shall be a single channel unit in a steel chassis nine inches deep and tworack units high, with an extruded aluminium front panel.
The EQ section shall have 30 smooth, well damped centre grounding sliders on standard ISO frequencies, from 25 Hz to 20 KHz. At the 0 point each slider shall be grounded, and in effect removed from the circuit.
The Anti Feedback section shall consist of an onboard FBX Feedback Exterminator card, with
Reset switch, an Amber LED to indicate the onset of clipping, and an Active or Bypassed switch.
Additionally there shall be a rear panel switch for changing the FBX filter width.
The Limiter Threshold shall be variable by a front panel control, from 10dB to +10dB, with a Red
Limit LED to indicate Limiting taking place.
There shall be an overall Output level control, variable from 25dB to +6dB and also an overall Active or Bypass switch on the front panel. An LED on the front panel shall indicate AC power being applied. On the rear panel there shall also be an audio ground lift switch.
The unit shall have electronically Balanced inputs and outputs, on TRS jack and XLR type connectors, with passive RFI filters and an Input impedance of 40 Kohms. The Input headroom shall be
+20dB, and the frequency response shall be 20
Hz to 20 KHz, ±0.5dB.
The Output impedance shall be 300 ohms, and the maximum Output level +20dB (+10dB FBX in), with a Signal to Noise ratio of better than
98dB unweighted (-86dB FBX in). Total Harmonic
Distortion shall be 0.004% (0.02 FBX in) @ 0dB,
1 KHz.
AC Power shall be supplied via a removable mains cable, connecting to an IEC connector with an integral fuse /voltage change switch on the rear panel.
The unit shall be the ARX AFW-1 Anti Feedback
Workstation.
Specifications available on disk
< www.arx.com.au
Our policy is one of continuous improvement, and therefore designs may change without notice. However, unless otherwise stated, specifications will always equal or exceed those previously given.
ARX Systems Pty Ltd, Australia; Phone: +61-3 9555 7859 Fax: +61-3 9555 6747
©1997 ARX Systems Pty.Ltd. ACN 006 471 825. All rights reserved. ARX Systems® is a Registered Trade Mark. AFW-1and
Anti-Feedback Workstation are Trademarks of ARX Systems. FBX Feedback Exterminator is a Registered Trademark of Sabine,
Inc, and is the brand name of its line of automatic feedback controllers.
