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In the Forum: Horn-Loaded Speakers
In the Thread: Vitavox’s S2 Survival Guide.
Post Subject: Now it's official again.Posted by Romy the Cat on: 4/18/2005
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online  Romy the Cat wrote: |
| Anyhow, now it is officially: I permanently removed a tweeter from Macondo. |
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After a few days of playing my Macondo without tweeter I begun to think what is goingon. The S2 eventually works clean and without any harshness, it goes all the way to 12KHz and not regular 12kHz but the idiosyncratic-Vitavox-S2-like 12KHz that is OKin my system. I really have no deficiency at HF but something is not as I would like it to be. Certainly am not taking about the “air” and all the rest typical audiophile BS. What I feel (and this feeling is not final) that this S2 idiosyncrasy at HF has a slightly too tangible character.
It is very difficult to describe what it is. I call it “aftershock effect”. It is kind of sound when sound already not there but something still ringing. My initial thought was the S2 has some UFH resonance but the “aftershock effect” subjectively manifest itself at approximately 7-8kHz. Probably the UHF modulate it with it’s lower harmonic at the auditable range, does it? I really do not know. Interesting that this resonance I consider very constructive, beneficial and superbly important (“good resonance”) and this resonance is one of the most remarkable qualities of S2 driver. However, I would like to have the amplitude of this effect perhaps 10-20% less then I have it now.
So, believe me or not but I begun to experiment with tweeters again. Well, I do not call it tweeter but, as I called it before, - the HF resonator. I was able to soften those 20% of the S2 “good resonance”. I use the EV T-350, 16R version with 0.1 Teflon cap. This effectively creates 99Khz filter, that arrives at 15Khz at minus 18dB. It hardly has any sound; at least I have to put my ears 3” form the driver to hear anything.
Now, I do not know if the softening of those 20% was due to the acoustic merging of the MF and the minor amount of HFform the tweeter (the driver are superbly time-aligned) or the HF driver acts electrically as a HF Zobel at UHF when the Vitavox run into it’s resonance or the HF driver when it kicks in just parallelling itself with S2 and drops it impedance sufficient enough to roll off the S2 for a fraction of a dB. I do not know the answer and I do not know if I need to know it. Also, I do not know if I will be keeping this approach as I consider some alternative options. However, I thought that the folks who are interesting where I am going with my Macondo should know that am still working with Vitavox S2
Rgs,
Romy the Cat
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