In brief, the AFS2 has the ability to detect when feedback begins to occur at any particular frequency, and will insert a sharp notch filter into the signal path at that frequency. With the AFS2 the team at Dbx have essentially taken the existing functionality of the AFS224 processor and developed new detection and control algorithms, along with an enhanced degree of user control and the ability to save and recall settings. One of the main criticisms of such devices has been the fact that they ‘alter the sound’, and of course this is true - that’s precisely what they’re for - but they are designed to alter the sound so as to eliminate feedback issues, and as such this has surely got to be a good thing. Much has been, and will continue to be, written about the reasons for and against using feedback processors, but I have always regarded them simply as automatic outboard EQ designed with a particular task - the control of feedback - in mind. I like to have a feedback processor available for every job I do, in the same way as I like to have extra sets of batteries and every kind of mains power adaptor - I may not use them every time, or even all that often, but every so often a situation will arise where that extra capability can make all the difference between a horrendous, stress–filled experience and a successful result. As a user of the previous model myself I was interested to have a look at its replacement in the product line. The new Dbx AFS2 updates and replaces the well–established and successful AFS224, which has been around for a few years now. It all sounded too good to be true at the time, but it actually worked pretty well in many applications, and the detection algorithms have now evolved and become increasingly sophisticated Imagine having an invisible, unpaid extra pair of ears and hands constantly monitoring the PA for feedback problems and instantly applying selective EQ corrections as necessary, all without interrupting the performance or affecting the overall sound quality.
I remember when automatic feedback suppressors first appeared and were hailed (by some, including me) as a wonder of their age. Is this Dbx’s most user–friendly feedback suppressor to date?
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