I stared a similar thread over on REW home forum, but I figured this place is a bit more lively and colorful
.
1. Art USB PreAmp
2. EMC8000 Calibrated (cross spectrum).
3. 20ft mic cable
4. Older onkyo receiver ( will change later).
5. Klipsch SUB-12 ( Ported down firing sub)
6. Klipsch KLF-30 mains
7. Klipsch KLF C7 Center
8. Klipsch RS52-II Side Surrounds
9. Klipsch in wall rear surrounds
Room is 28L*19W*10.5H- Zero treatments at this time.
I've read a ton of threads about REW usage but could use a bit of confirmation that I am applying what I have read appropriately.
SUB is not smoothed. All others were smoothed to 1/6 as that is what I read on REW home forum as the preferred method. I've seen 1/12 posted as well.
So first off- my sound card cal and then SUB response.
For the sub I tried to get a SUB only response by placing the mic in the port hole- see attached. Is this good or is there a better way(without going overboard). I just wanted to see a baseline. I used the 0deg MIC cal for the measure.
Then I did multiple measures by moving the sub around the room, and I ended up with the current response shown. It has the least amount of peaks and valleys as compared to other spots. I do plan on using 2 subs eventually once I get the hang of things.
So how do my inital measures look as far as procedure?
RT front speaker as measured at main listening position along with ETC.
BAD ETC EXAMPLE!
Above is a bad example of ETC. The problem was not REW impulse calculation preference issue as implied.
http://www.avsforum.com/t/1415741/speaker-measurement-room-measurement-treatment#post_22135342
1. Art USB PreAmp
2. EMC8000 Calibrated (cross spectrum).
3. 20ft mic cable
4. Older onkyo receiver ( will change later).
5. Klipsch SUB-12 ( Ported down firing sub)
6. Klipsch KLF-30 mains
7. Klipsch KLF C7 Center
8. Klipsch RS52-II Side Surrounds
9. Klipsch in wall rear surrounds
Room is 28L*19W*10.5H- Zero treatments at this time.
I've read a ton of threads about REW usage but could use a bit of confirmation that I am applying what I have read appropriately.
SUB is not smoothed. All others were smoothed to 1/6 as that is what I read on REW home forum as the preferred method. I've seen 1/12 posted as well.
So first off- my sound card cal and then SUB response.
For the sub I tried to get a SUB only response by placing the mic in the port hole- see attached. Is this good or is there a better way(without going overboard). I just wanted to see a baseline. I used the 0deg MIC cal for the measure.
Then I did multiple measures by moving the sub around the room, and I ended up with the current response shown. It has the least amount of peaks and valleys as compared to other spots. I do plan on using 2 subs eventually once I get the hang of things.
So how do my inital measures look as far as procedure?


RT front speaker as measured at main listening position along with ETC.

BAD ETC EXAMPLE!

Above is a bad example of ETC. The problem was not REW impulse calculation preference issue as implied.
http://www.avsforum.com/t/1415741/speaker-measurement-room-measurement-treatment#post_22135342
Quote:
Nyal Mellor, Acoustic Frontiers LLC & Jeff Hedback, HdAcoustics
ETC of the L & R speakers should:
• Be visually identical (with only minor deviations) from 0‐40ms
• Be down to 10dB
by 40ms to prevent breakdown of the precedence effect
• Clearly show a decrease in the amplitude of energy over 040ms.
The decay pattern may or may not be continuous.
Quote:
Nyal Mellor, Acoustic Frontiers LLC & Jeff Hedback, HdAcoustics
A popular approach is simply to analyze the level of reflections on an ETC and compare these to the
direct sound, setting a target for the reflections to be 10dB or more less than the direct sound. This
analysis is not sufficient since ETCs are spectrally blind (i.e. they contain no information as to the
spectral content of the reflected sound) and the auditory system is very discerning in its requirements
for spectral balance between the direct and reflected sounds in a room.