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In the Forum: Horn-Loaded Speakers
In the Thread: My Multi-way Horns
Post Subject: The Room EffectsPosted by skushino on: 12/1/2009
Romy, I re-read your comments a few times to better understand your feedback.  I think you are saying the effects of my room may be dominating any problems with the Edgarhorn bass, or at least I can't know since I don't have any objective data.  Is this correct?

Maybe you're right.  But here is why I'm not convinced.  My room is kind of funny.  The floor is suspended wood over a crawlspace around 4' deep.  The right side wall is only one sheet of drywall backed by insulation.  Behind that wall is another void the size of a small room.  The physical dimensions of the room are around 15' x 18' x 8', but the acoustic dimensions at low frequencies are much larger, probably almost twice as large.  I'm surprised at the sound in my room.  When I set-up my system, I expected a sonic disaster due to room dimensions and LF nodes.  I do notice nodes at sub bass frequencies.  But I do not hear them at mid and upper bass.  This is with three different speakers through the years.  Yes, this is all based on listening rather than measuring.  Naturally when I get the RTA I'll learn to use it and take measurements.  I may need to eat my words later, but not yet...

The point that I made is very deep-seated. People hear somebody playback, like the result and they attribute the fact that they like it with whatever reason they would like it to attribute. So, I do not take the fact that you  had good impressions from above mentioned playbacks in association with the fact the they had proper “region below 200Hz”. 

I should have written clearer.  I listed horn speakers I liked as reasons for my interest in horns in general, and getting Edgarhorns in particular.  I thought my old Klipsh, the vintage Tannoys, and John Tucker's horns were not ideal bass, but they were good enough overall.

But there are two mains problem with it. First, you did not took advantage of the Edgar midbass and did not made it to sound proper. Second, with your new midbass and upperbass bass horn you will have the absolutely same problem but you did not address them with Edgar midbass and you most likely will not address it with new horns. I ma taking about the situation to make any configuration to sound as it shell sound, of to be able to get best out what is possible.

Yes, I didn't do all that could be done with the Edgarhorn bass if that means using objective tools.  I agree and that's why I'm buying the RTA.  But I have decided to move on.  The Edgarhorn bass annoys me from a conceptual perspective.  It isn't a bass horn and driver done as well as it could be.  Not close.  The new mid-bass and upper bass horns are a step in the right direction with less compromise.  If the room is an issue, I'll work on it when I get the RTA.

It is highly likely that you would need to use a huge overlap from you midbass and upperbass horn.

Yes, it will have that flexibility.  The upper bass horn is purposely almost like a fundamentals channel.  There is plenty of overlap between it and the midbass and MF.  I modeled these horns.  But I still have no idea how close the model results will be to the actual results in my room.  The overlap should be useful for fine tuning.  I was interested in how you used your fundamentals channel to tune Macondo.

You also need to reverse your trapped horn and make the hole at bottom not atop as your 240Hz crossover point ay will not vertically center the output of midbass and the trapped horn.

Yes!  I think this is a good idea.

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