Originally Posted by craig john
That's pretty impressive Chuck. What does this mean: "It is not an exact apples to apples comparison as I measured with Dirac about 3 to 5 inches closer toward the MLP when I did the outside measurements."?
Where your mic placements similar for Audyssey and Dirac, except of the "outside" measurements?
I used 8 measurements with Audyssey and 9 for Dirac. For Audyssey, I measured at the MLP, approximately 24 inches on either side of the MLP, behind the MLP about 24 inches at two points (behind the two outside positions on either side of the MLP), and 3 in front of the MLP about 24 inches. With Dirac, I measure at the MLP, about 18 inches on either side of the MLP, about 18 inches in front of the MLP (two measurements and then do the same positions but about 6 inches higher. This is the recommended positions for measuring a single seat with Dirac.
The Dirac curve doesn't look like the preset curves I had for Dirac in the 88A that I had.
Wisdom Audio had Datasat add output channel presets which Dirac does look at. Dirac ignores input channel presets.
The 88A presets had about a 6 dB downward slope from low to high frequencies. Yours looks pretty flat with just a couple dB of slope. Did you set it that way, or does the RS20I have different presets that the 88A?
Dirac provides an initial target curve which does have a very slight downward slope, but that can be modified as desired. While I modified the upper and lower end of their suggested targets (to eliminate any possibility of over correcting) I did not change the overall slope.
Can the Pro Kit be used to set a target curve that doesn't have the steep roll off of the higher frequencies? It looks like Audyssey is starting to roll off at about 5kHz and is down well over 10 dB at 20 kHz. My understanding is that it's not supposed to start the roll off until 10 kHz, and then it's only supposed to be 3 dB at 20 kHz.
I assume you mean the Audyssey Pro kit? You can change the slope of the upper portion of the target curve. I don't recall making any changes to the recommended Audyssey target curve, but I may have.
Also, can the Pro Kit be used to eliminate the 2kHz dip? IIRC, my friend Jeff did that... and then immediately put it back in because he didn't like the result with the 2k dip removed.
In Audyssey Pro, you select a button to enable the 2K dip. I ALWAYS enabled it. Without the dip there was a definite harshness that would show it's ugly head on occasion particularly at high SPL's. I don't have that dip defined in my Dirac target curve and I have yet to hear the same issue. I have listened to close to ZERO music since I got the RS20i installed. Once I got it up and running, I started a NEW project to clean up my equipment rack (new rack from Middle Atlantic) AND do some serious cable management. That turned out to be a much larger task than I could have possibly imagined. I got the equipment out of the old rack and into the new one (after assembling the new one) in 1 day. I have been working on cable management coming up on two weeks, all day most every day.
Finally, how much different does Dirac SOUND than Audyssey?
Totally different. Envelopment is far, far superior. That was not a complete surprise since when I ran Dirac for two channel (from my server), it did a much better job of imaging than did Audyssey. So if you think about imaging between 11 speakers instead of two, what you end up with the better imaging in a 3 dimensional space, aka improved envelopment.
Individual sounds that were previously buried in the mix have become more distinct. There is less sibilance in voices. The blend between the subs and all other speakers is greatly improved. The bass is also cleaner.
Stupid amount of money to spend but certainly better improvement than going from a $1000 amp to a $20,000 amp, changing all of your cables, etc. Next time you come south, come see my and we'll see if we can't get you to spend some more money !!!!!!