This should be interesting [DEQX by two]

[Mr. Widget]

I do have a question, though. The Deqx site mentions speaker correction, room correction, and media correction. For room correction, it mentions up to 10 bands of graphic or parametric EQ, and apparently less for media correction, but I couldn't see where speaker correction might also have a specific filter selection.

There are only ten bands available for room and CD/media "correction". These ten bands can be used as a simple graphic equalizer (I can't imagine why anyone would ever do that... unless they simply can't get their head around the use of a parametric.) As an example of how powerful the DEQX parametric filters are, only two of the parametric bands are all that are required to duplicate the RIAA phono curve with an accuracy that is higher than most phono stages.

Anyway, you can access three of these bands and modify and store them for tweaking the sound of up to 99 different "room curves" or "CD curves"... these are all accessible via the remote control... or you can access all ten bands and use them to "correct" your room.

In addition to these parametric filters there are additional FIR filters that are used to "correct" your speakers. These filters are separate and are automatically generated based on your speaker measurements. Here are the correction filters that DEQX created for Project May. It is easy to see the mid band correction is roughly the mirror image of the curve supplied us from JBL (the band between the 800Hz and 10KHz crossover points). You can also see the DEQX "correction" filtering balancing out the naturally rising curve of the 1500ALs. (Below 800Hz)

For those who don't understand what this graph shows... it is not the response of the speakers, it is the electrical boost and cut created by the DEQX unit to balance the response of the speakers. Therefore when this curve goes up, that is where the speakers originally had too little output and where the curve goes down, the speakers originally had too much output.


Widget