New to REW and looking for some info.

[watsonte]

brucek wrote:

Yes, just run the Settings Check Level routine and set the level at the listening position to 75dB using the SPL meter. Then set the Input Level correctly and then run the Calibrate SPL routine, which just matches the REW SPL meter reading with the real SPL meter (so they track).

No idea why your meter isn't working. Plug it into the AUX of your reciever and see if it works - it's a microphone - talk into it.

brucek

Alright well I cant really thank you enough, like I said originally I am very new to audio calibration so it's nice to have someone who will spend the time to explain almost everything.

[watsonte]

I think I finally got it right....Let me know what you think.

If I apply 1/3 Octave smoothing it gets rid of my two major dips...What does that really mean in terms of output though? Like I said before Im very new to this stuff.

[brucek]

I think I finally got it right....Let me know what you think.

You set a target of 85dB - normally we use 75dB, but it's OK if you like 85....

If I apply 1/3 Octave smoothing it gets rid of my two major dips...

Smoothing is used on full range measurements when comb filtering obscures the overall trend and the smoothing helps reveal the response a bit better. Don't use it on a sub measure.

Your subs low end extension is quite good, but terribly wonky between 15-40Hz. Have you tried moving it around to smooth it a bit?

brucek

[watsonte]

brucek wrote:

You set a target of 85dB - normally we use 75dB, but it's OK if you like 85....


Smoothing is used on full range measurements when comb filtering obscures the overall trend and the smoothing helps reveal the response a bit better. Don't use it on a sub measure.

Your subs low end extension is quite good, but terribly wonky between 15-40Hz. Have you tried moving it around to smooth it a bit?

brucek

I have yet to move it too much, I plan on really moving this thing around sometime this weekend when I have a little more time on my hands.

My apartment could be contributing somewhat, at least I think it could, to the odd dips, the walls are plaster and the wood floors are paper thin...I also have part of the support for a fire escape right beneath the sub, so currently I am hoping it is only the location thats the issue.

[Wayne A. Pflughaupt]

I have yet to move it too much, I plan on really moving this thing around sometime this weekend when I have a little more time on my hands.

Hopefully that will help. Usually when we see response this ragged, it’s a placement issue.

Regards,
Wayne

[watsonte]

Wayne A. Pflughaupt wrote:

Hopefully that will help. Usually when we see response this ragged, it’s a placement issue.

Regards,
Wayne

Well, I moved the sub around for about 2 hours. I was able to flatten out the response between 16-25hz, and then from about 40hz on...Still odd dips occurred at 30 and 35 every time. I wish I had saved some of the sweeps, but after moving and tweaking and moving and tweaking I lost track of what was where.

Also, the location where I seem to get the best response also resulted in moving the most furniture so sadly I will leave it at my original position and allow my larger mains to take some of the heat off around 30hz...

At this point I would be willing to bet my odd dips are more related to the poor construction of my room than poor performance of my sub.

[Wayne A. Pflughaupt]

At this point I would be willing to bet my odd dips are more related to the poor construction of my room than poor performance of my sub.

I don’t think you can characterize any sub that can solidly hit 15 Hz as a “poor performer.”

Do you have a good corner available? I.e., one with no openings on either wall close to it?

Regards,
Wayne

[watsonte]

Wayne A. Pflughaupt wrote:

I don’t think you can characterize any sub that can solidly hit 15 Hz as a “poor performer.”

Do you have a good corner available? I.e., one with no openings on either wall close to it?

Regards,
Wayne

No, the only two decent corners available are too close to my sitting position and create a very localized sound. In fact I actually feel more pressure (on my ear) depending on where its placed, left or right.