Room Eq Wizard (REW)

[jakelm]

Just an update to inquire on who is still using it.

Question: Calibrating the Rat Shack meter is fairly simple since HTS has a cal. already to import. But, has anyone tried any other mics? Is the analog rat shack working out ok you? How often do you calibrate?

I was thinking about using the mic that came with my HK. How well would it work?

Po

Just a few questions to throw out there....:p




Jake

[ShinAce]

Rat shack meters can vary by up to 2 dB from reference, if memory serves me right.

Try any mic you can get your hands on.

[jakelm]

Rat shack meters can vary by up to 2 dB from reference, if memory serves me right.

Try any mic you can get your hands on.


I know, but the nice ppl at HTS provided a calibration that can be installed along with REW.

I might give my HK mic a try

[jakelm]

What do you all think? And how can I get the REW to measure above 8khz?

This is taken in stereo w/sub

[jakelm]

This is taken in Logic 7ch cinema surround

[jakelm]

Logic 7 w/ -5 tilt

[jakelm]

Still cant figure out how to get it to read passed 8khz:mad::mad:

[Face]

By the look of your graph, that should be the least of your concerns.

[jakelm]

Waterfall logic 7

[jakelm]

By the look of your graph, that should be the least of your concerns.

Help? What are your thoughts?

[Face]

Play with phase and placement till that nice dip from 60-80 gets better.

[jakelm]

Play with phase and placement till that nice dip from 60-80 gets better.

LOL...I just checked, my subs xover was turned to 40hz... THE WRONG WAY>>>>:eek:

[ShinAce]

I was just about to say the same thing. That dip from 60-80 Hz shows up consistently.

The graph is not as bad as you might think. You would get a better idea of the dips and peaks by using a linear scale for frequency.

There also seems to be a dip from 200-300 and a very narrow dip around 500 Hz. What kind of room treatments do you have(carpet, blinds, sound panels, etc...)?

[jakelm]

Thats from the HK auto Eq.

Dont know what to do about the dip @~500hz.

Room treatments?????
Lets see, hmmmmmmm, the wife put curtains, added a love seat and another recliner. Carpet floors. Thats about it...lol

No treatments.

[ShinAce]

That's plenty of treatment for an average room.

I have plaster ceilings, hardwood floors, and no rugs.

The dip above 500 Hz is so narrow that you would be wasting time trying to track it down. Move the speakers a few inches or play with the toe in to see if that changes it.

[jakelm]

That's plenty of treatment for an average room.

I have plaster ceilings, hardwood floors, and no rugs.

The dip above 500 Hz is so narrow that you would be wasting time trying to track it down. Move the speakers a few inches or play with the toe in to see if that changes it.

With everything, carpet and all, I have very little, if any, reflections. My biggest problem is valted ceilings, but its not so bad.


Adjusted sub xover and toed in the 7's just a bit. The responce is much better in stereo, but in Logic 7 surround, I'm still getting a dip around 500 and spikes around 5khz. I cant measure above 8khz, so I dont know about the top end.:confused:

Will keep playing with it....

[ShinAce]

Do your speakers have a crossover point at 500 Hz? Are the 7's three ways?

That could be it, but I doubt it.

Can you do a near field test? Have the mic 1" from the driver you are testing(woofer or tweeter) and run the same test at a low volume. This can help determine if the dip is from the speakers or room reflections.

[jakelm]

Do your speakers have a crossover point at 500 Hz? Are the 7's three ways?

The only speakers I have in use that have a crossover @~500 are the mid bass drivers in the small surrounds. The Polk monitor 7's are 2 way.

That could be it, but I doubt it.

I doubt it as well...

Can you do a near field test? Have the mic 1" from the driver you are testing(woofer or tweeter) and run the same test at a low volume. This can help determine if the dip is from the speakers or room reflections.


I will run it in 2 channel stereo and uplug the left then right speaker for individual speaker calibration.

[jakelm]

After much headache, I was able to accomplish this. I sure stepped in a big pile of doo doo,:eek: getting started with this calibration....

Keep in mind, the HK and the RS mics are not trust worthy above 12khz.

In both graphs, I used the HK's mic. I did install the RS mic calibration, but to me, the HK's mic still did a better job.


...or I could be dreaming..:o

The first graph is PllxII with 1/3 octave (blue)

The second is Stereo w/ .5 octave. (yellow)

Take into mind, that my sub is tuned too low, so adjustments will be made there,,,,

I dont think I can fix that dip between 800hz and 1500hz, without modding the crossover or buying a Eq,

[ShinAce]

That actually looks pretty good(for a real-world graph).

[jakelm]

That actually looks pretty good(for a real-world graph).


Thanks.... Cause thats where I live...in the real world...:p


The guys over at home theater shack, are very knowledgable, but they are telling me its not right because of the mic I used and the way I calibrated everything. They said I should run the mic to the Line In instead of the Mic In.

But when I do that..things get screwy between the mic and the Pc.

I'm so confused....:confused::confused:

[fumoffu]

I have a DIY sub too :) I also Have the BFD, but I haven't really got into it yet. I am waiting to get my new LR so I can look at the cross over range too.

Anyways, I looked at the the shack a bit myself, and have been meaning to get into REQ too. Did you do the loop back configure of the of the line out and line in?

[jakelm]

I have a DIY sub too :) I also Have the BFD, but I haven't really got into it yet. I am waiting to get my new LR so I can look at the cross over range too.

Anyways, I looked at the the shack a bit myself, and have been meaning to get into REQ too. Did you do the loop back configure of the of the line out and line in?


The loop t loop, is to calibrate the soundcard, cant calibrate without.

[jakelm]

Just a small update.

After tweeking it abit, I have a graph, from 10hz - 500hz, the bass to midbass region. I have learned the RS metere is not reliable beyond 1khz.

This is taken with a 1/1 scale. I usually look at a 1/3 scale but this scale give a better peeks and nulls.

The sub is xo'd at 120hz while the mains are @ 80hz, after some phase issues, I think it came out pretty well. I know it sounds alot better now.

[fumoffu]

So how much EQing did you end up with?

[jakelm]

So how much EQing did you end up with?


No Equ'ing, just simple adjustments like phase and HK's xover settings. I have no eq in the mix. Actually I do not own an eq.

That graph is in 2 channel stereo. 7's and sub.