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In Reply to: RE: Active crossover with 48dB slope capability? posted by David Yost on October 22, 2009 at 05:14:26
David,
The only advantage of the DEQX and TACT units is their room correction algorithms. Room correction algorithms are essential for very large rooms with multiple delayed speakers (such as churches, auditoriums, etc). With a pair of planer speakers in a home living room, I'm not sure that room correction EQ and delay processing is really all that beneficial.
The nature of the room correction will end-up balancing the combined direct and reflected sound with EQ. This will result in the direct sound having excessive EQ to make up for the absorption of the reflected sound by the room surfaces and furniture. This is not a bad approach with conventional box speakers, but some might find it unpleasant with maggies.
The room correction is also only as good a the measurement microphone which is used. Use of an non-calibrated microphone will introduce additional frequency and phase errors.
Finally room correction needs to be optimized for all the possible listening positions that you might use (only at the center of the couch, or each of the possible listening areas?). Many of these units will process multiple locations, but then your still just averaging the total direct and reflected sound.
Some EQ for the lowest bass frequencies (room responses) may be beneficial, but I personally find the higher frequencies room corrections to generally be unnecessary and objectionable, unless you have a very "live" room without carpet/curtains, etc.
There are a number of commercial (professional) DSP processors that provide this capability as well. In my opinion, the TACT and DEQX seem to be more about boutique hi-end marketing, than improved performance over the more widely available and better supported commercial products.
regards,
Jim
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