My introduction to full-range

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#23
RTA readout using a ECM8000 and TrueRTA. I ran pink noise for about 15 seconds with the peak-hold turned on.

I haven't added anything to the CC yet so I'll see if that smooths out anything when I do.

FrugelRTA.JPG




Thoughts, comments, suggestions?
 
#25
It appears boosted between 100-500Hz. If I can tune that out my -3db point would be around 50Hz. Not bad.

So what does the suprabaffle improve? Did I read that it will boost 500-1000Hz?

Looks like I also need some help between 2-5KHz.
 
#27
chrisb said:


Are you sure about that? This is probably not the place to discuss or compare pricing to any commercial product, so I'll leave it at that.





maybe yes, and maybe again soon, but don't expect any listening impressions to be discussed on any forum by Dave or myself - it's a long story.
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I can certainly appreciate that, I'm still recovering from the "Acid Attack" on one of the other forum concerning cone materials.

I've disagreed with people in the past, as they have disagreed with me, but it was almost always a civil discussion...but there are some really rabid, nasty people out there on some of the other forums that read an awful lot into what was just a simple statement.

Best Regards,
TerryO
 
#28
chuyler1 said:
It appears boosted between 100-500Hz. If I can tune that out my -3db point would be around 50Hz. Not bad.

So what does the suprabaffle improve? Did I read that it will boost 500-1000Hz?

Looks like I also need some help between 2-5KHz.
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Chuyler,

I'm not going to say that my opinion is conclusive, but why would you want to eliminate the (2-5kHz) BBC dip, that some manufacturers spend a lot of time trying to incorporate "into" the FR?

I've seen a lot of in-room FR graphs, and yours are actually pretty nice as well as smooth. In the magazines and the Ads, they do a lot of "smoothing" of the graphs and even then, they seldom look as good as yours.

Best Regards,
TerryO
 
#33
chuyler1 said:
I've got an old TEAC EQA-220 in the basement I can play around with. Not sure whether it's audiophile grade but I can see if a change in freq response helps at all. But, honestly, they sound pretty damn good as-is.
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I'd bet that they sound great!

In-room response graphs can look pretty bad if you're not used to seeing them. Measurements below 200Hz or so are very suspect in just about any circumstance, as it's really hard to capture meaningful data that low without room effects causing problems.

Dan Wiggins used to place his speakers on a small platform afixed to his forklift and the raise them about 8 feet off the ground. He also had an extention for his mic stand.

You, and many others, were probably wondering what to do with that old forklift just sitting in the corner...well, now you know!!!
😀

Best Regards,
TerryO
 
#34
Hmm, that brings up a good point. If I move the forklift out of the corner, I can free it up for the frugel deflector. Why didn't I think of that? LOL.

Ok, so the real question is, can you compare one person's room response to another's and make any conclusions about enhancements?

Or should I just try everything myself and compare before/after in the same room with same mic placement to see how things change and how music sounds after the change?

I'm not stranger to weird RTA curves. Most of my audio experience is in the car...and it can be virtually impossible to tune with a 1/3 octave EQ unless you know what to ignore on the graph.
 
#36
Scottmoose said:
Generally speaking, you can't really compare the responses of different rooms. There are just too many variables to control. A handful of very broad generalisations lurk around, but anything more specific is a crapshoot. Suck-it-and-see really.
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Isn't relationship advice another forum? :cannotbe:


Seriously, tho - we ran out of time on Sunday afternoon to take measurements in another room to prove exactly the first point.

that'll have to wait for another day.
 
#38
The measurements posted here, as well as in the main Frugalhorn thread share some common characteristics.

There is a dominant resonance peak at around 240Hz. The boost in this area is probably what is sometimes referred to as "voices a little to resonant or full bodied". In some rooms this may be OK, while some FH owners have struggled a lot with this without finding a solution.

The measurements by chuyler1 indicate a flatter response curve than most I have seen. If this is respresentative, it could be that just a little more play with positioning could be the key.

Moving the speakers a little out in the room is usually the first thing to try if the sound appears a little "boomy", but this will usually attenuate the lower frequencies even more than the midbass peak. I have not found any damping placed anywhere within the CC or horn path that significantly reduce this peak.

SveinB
 
#39
For reference, here is my room layout. It is our office-slash-guest-bedroom with a twin bed. The speakers are currently about 6" from the back wall. The left speaker is only inches from a very tall dresser. The right speaker is about 18" from a tall glass display case in the corner. The desk between the two speakers is open on the bottom, more like a table.

room.GIF


Not proper placement at all but they still sound pretty convincing!
 
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