Analyze my frequency response graph

[phorensic]

Just the lower frequencies, which shows my room's traits I guess. ~375 sq. ft. living room/kitchen in an upstairs apartment with flexy floors and extremely flimsy and poorly insulated walls and super thin single pane windows. Used this set of test tones and graph: http://www.realtraps.com/test-cd.htm

Jolida 1701 fed into Paradigm Monitor 3's on sand filled Sanus steel series stands.

http://i65.photobucket.com/albums/h233/phorensic/Test-Graph.jpg

So what do you think? Maybe it doesn't mean much, maybe you guys will just enjoy seeing some measurements. Take it for what it's worth.

[Donkey!]

Ahhh... that's fairly typical. All the normal peaks and valleys, at about the normal frequencies too.


Mine's as flat as a whores back :D

[RichPA]

Yep, that is pretty typical - and not bad, actually, except for the bass rolloff, most of the points fit a +/- 3 dB window. Hard to do better without serious room treatment and/or a good parametric eq.

[phorensic]

Good to know that it looks relatively normal.

What do you mean by the bass roll-off not looking right? These things are only rated to 38Hz in room. Also, I stopped measuring lower than 25Hz because the measurements were so low and I couldn't hear/feel anything at all.

[RichPA]

Good to know that it looks relatively normal.

What do you mean by the bass roll-off not looking right? These things are only rated to 38Hz in room. Also, I stopped measuring lower than 25Hz because the measurements were so low and I couldn't hear/feel anything at all.

Sorry, I didn't mean to imply that - just meant that the bass roll-off, which doesn't look bad at all for speakers that size, is almost the only exception to the whole thing fitting within +/- 3dB.

[VinylHanger]

Could one of you guys explain what it is we're looking at. I see it and what are the numbers on each side, and how does it relate to the output of the speakers. I am assuming it is a one note test tone? Probably a simple explaination, but I am clueless at these things. Maybe not a one note test tone, it shows how the speakers as a whole react to each different tone?

[RichPA]

Could one of you guys explain what it is we're looking at. I see it and what are the numbers on each side, and how does it relate to the output of the speakers. I am assuming it is a one note test tone? Probably a simple explaination, but I am clueless at these things. Maybe not a one note test tone, it shows how the speakers as a whole react to each different tone?

Pretty simple, really - play back the tone at a particular frequency, measure the level with a meter, repeat for each frequency. Time-consuming compared to real-time analysis (RTA) which is based on measuring the multiple frequencies making up a pink-noise signal all at once, but gives you a graph like this with minimal investment in test gear. If all the points made a horizontal line, you'd have perfectly flat frequency response, but that just doesn't happen with speakers in a real environment, especially in the bass.

[phorensic]

Just moved back home with my parents because the roommate ditched me in a very short timeframe. I thought it would be interesting to post my results for the room that my setup is now in. It's wildy different. Subjective listening suggests it has more bass in the popular frequencies that are reproduced on the music I listen to - mostly rock and metal.

http://i65.photobucket.com/albums/h233/phorensic/TestGraph.jpg

And I just so happen to have a photo of the new room, well some of it. It's a very small bedroom with a large desk and queen sized bed in it, which I suppose greatly influence the room interaction.

http://i65.photobucket.com/albums/h233/phorensic/overkill-1.jpg

On a side note, I am using a plugin for Winamp called Shibatch Super EQ to attenuate the peak from 52Hz to 98Hz by -6dB. Seems to work very well in flattening things out. My meter only fluctuates ~3dB when doing a sweep from 35Hz to 100Hz, versus like a 9dB wild fluctuation without it on. Also, if some of you read my posts on my ultra-low frequency "oscillations" or whatever you explain it as, I also put in a highpass filter 0-25Hz -60dB. That should help with wasting amplifier power on those weird super high xmax transients I was getting.

[RichPA]

Interesting comparison. Though you don't show the response to higher mid-bass frequencies on the new graph, you've clearly got better response with the new setup. Nice and smooth for the 50-100 Hz octave, and a reasonably slow rolloff below, which should indeed sound pretty good with rock bass.

[phorensic]

Yeah it gets tedious measuring this way, so I gave up early.

I forgot to mention that the graph I just posted is without any EQ.