Recent content by jtalden

Here is a link to a good site for interface reviews. The MOTU M2 is a good value if you are looking for a high-performance unit. For normal acoustic work almost any of the audio interfaces are fine. Just get one with the features you want.

If the basic question is still how to get that slam feeling, my general thoughts are similar to those already offered. I'm not the expert here and have little if anything to add. I have only skimmed the thread and have not looked at your mdat files. That said, here are the key elements in my...

Yes, the rear polarity must always be opposed to the front polarity to absorb the sound wave.

The option provided is still a DBA setup as all 4 SWs are inverted from their current DBA polarity settings.

Error trying to save any captured graph image:

Well Done. :T The timings between the 4 SWs is ideal. The timing between the L,R mains and 4SWs is also ideal. It is the conventional target. No changes are needed (with the possible exception of SWs level adjustment) prior to EQ to your selected house curve. Option: I also inverted the 4 SWs...

It depends how precise you want to be. Most of us are not too concerned with exact levels as we are normally only concerned with relative levels as for PEQ, e.g. If that is your situation, just calibrate to choose convenient settings as maybe; 1 o'clock for input and 2 o'clock for output on the...

The REW Alignment Tool was created to assist in aligning sub to main XOs. It can also often work well for sub to sub alignment, but I haven't personally used it for that very often. In this case I started with it but got a wide variation of delays. I tried different several different cursor...

The 26.24 ms delay you selected for the front sub results in the front sub now trailing the rear sub by about 9 ms. That setting does provide relatively favorable SPL smoothness through the bass range compared to most all other settings. I would have recommended a delay of 17.35 ms which would...

The file you posted was not suitable for use in step one of process. The single measurement that was labeled "All Subs & Mains". We need the 4 speakers measured individually. @JStewart posted this to show the 4 measurements that are needed: All 4 of these should be measured using the existing...

One of the 2 measurement files you already created has the left channel timing chirp and the right channel measurement sweep. I confirmed that in the mdat you posted. You used it to create the "Main R Full Sweep" measurement. We are just using that same file again. The timing chirp is on the...

I don't know. Either way can be difficult if the XO range is cluttered with room effects. I have always used the phase tracking method and only checked out the filtered IR method a few times to confirm it works.

From Post 12 There are usually several way to accomplish a task. I suggested an easy way to do it. You don't yet see the logic, but why not try it. If I made a mistake, or you do, the poor mdat measurement result will provide us clues as to the problem. This process uses the right channel...

Pick a point near the center of the XO range, but avoid any position that that has an SPL dip in either of the measurements. Select "Filter IRs at the cursor" then "Align IRs at cursor". If the first 5 large peaks do not overlap well move the cursor a little to another position that has good SPL...

Okay good. That explains why the timing throughout the bass range looks good. The measurements served their purpose to confirm you can make good measurements. Very helpful information - distributed mono subs a good choice and 120 Hz is not too high in my book. Yes, it is good to experiment...