My audio journey - hoping you can help with REW data

[MrPotatoHead]

I am replacing my Zaph ZD5 DIY speakers with a pair of new Mofi V10s that are currently thawing out in my living room. But before I put them in my system, I wanted to quantify my current system so that I have a sort of baseline to reference as I make upgrades and potential room improvements (possibly making my floor less bouncy - current speakers and room photo in that link). I'm hoping to update this thread as things change.

My main question at this point is if I'm doing REW right. I ran several sweeps with Audyssey set to Reference and Off, and with my two subs (Overdrive10 diy and Hsu VTF-1 Mk 2) on and off.

While these results don't look great to me, I am hoping that I at least executed them properly. If not, I can re-run them again tomorrow before I unbox the V10s.

Note: I attached my zipped mdat file but it's too large at 6.1MB. I've got more sweeps than I included images below - perhaps too many.

And, finally, Left and Right with Audyssey On and Subs On or Off:

 

[janbth]

A good start, but a few comments:

• The y-axis should have a span of about 50 dB, say 50-100 dB. Always use the same span for all your plots. This allows us to compare your plots with each other and with plots «out there».
• Use Var smoothing, not 1/6. This will reveal relevant details in the bass, like peaks from room modes.
• To compare measurements it is informative to plot multiple measurements in the same graph, i.e. use the All SPL tab. I guess this is what you do in your last graph.
• If bass is the focus, then show L+R with and without subs. L or R alone (with or without subs) is of less importance.
• From your graphs, it looks like you have room modes at about 40Hz and 50Hz, and either your speakers, your listening position, or both, is located at a null of these modes. Try to look into that.

I hope this helps!

 

[MrPotatoHead]

A good start, but a few comments:

Thanks for the tips!

I set my graphs to "set to data" and smoothing to 1/6 based on the tips in this thread. But I get that it's best to have the vertical access all the same. I was mostly just trying to get a snapshot of my system before I got my new speakers which I have already swapped out. I ran sweeps with Audyssey on and off and subs on and off so the All SPL graph is pretty messy but here it is. The second is L + R with Audyssey Ref and subs on. Those two graphs have the same SPL range but one image is taller than the other for some reason.

My living room is open to my office on the back wall with always-open French doors and to the dining room to the right.

I'll be posting more as I move forward.

 

[sam_adams]

Those two graphs have the same SPL range but one image is taller than the other for some reason.

When you do screenshots of the All SPL tab in REW, the size of the plot window shrinks vertically with every line of additional measurements in the plot selection section at the bottom of the window.

Posting the .mdat file is preferable to posting screenshots.

 

[MrPotatoHead]

Posting the .mdat file is preferable to posting screenshots.

Thanks. My zipped .mdat file was apparently too large and I couldn't upload it.

 

[sam_adams]

Thanks. My zipped .mdat file was apparently too large and I couldn't upload it.

You can save the measurements in parts to different .mdat files and then upload them.

 

[janbth]

Posting the .mdat file is preferable to posting screenshots.

Posting the .mdat is a good idea, but I would encourage people to also post images of the plots. I’m not always at my computer and able to run REW. I also confess that I will probably not be bothered to download an .mdat, fire up REW, load the .mdat, produce plots, etc. If a plot has been posted, I think it will generate more response from people.