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jessie.dazzle wrote:

Is the S3 as sensitive as the S2?

Yes, they are appearing to be the same sensitively.

jessie.dazzle wrote:

I keep telling myself that I am almost done making horns, but I keep having ideas to try additional horns (more on that when I finally decide to do it).

Do what I did. Stop experimenting with horns and begin to actually USE your playback. If you still have an itch to “think horns” then insult others about their wrong horn moves. It keeps you hands free and fulfills your desire to exercise own findings about what works with horn.

jessie.dazzle wrote:

Hm... It would probably become clearer to me if I had an S3 to compare with the S2. The diaphragm clamping plate of the S2 is very stout, but yes it is mechanically coupled to the heavy body of the driver (bolted right into it actually) as well as the rear cover.

And I very much hate it. I hope you have learned that super tightening of the clamping plate is not always good. However, if I use the still and very heavy Dominus cables then they apply force to the S2/S3 binging posts… that are on the very same clamping plate. It not supposes to be this way. I feel nothing, nether binging posts not the body of the driver shell have impact to the diaphragm pressing plate.

jessie.dazzle wrote:

If I understand correctly : With an upper knee of 2 KHz, you are suggesting that I try narrowing the band pass by moving the lower knee up to around 750 Hz (?) Hmmm... Yes I can try it, but it seems more logical to keep the 450 Hz lower knee (I like the body it adds) and to drop the upper knee a bit as you suggest above. As for beaming, I know how unlikely it seems, but I don't have beaming issues.

What I was trying to say is that if your Fundamental Channel operates before MF Channel. If your Fundamental Channel goes all the way up to 2000Hz then your MF Channel most likely kicks in at higher frequency. If your MF stars at 2000Hz then there is no need to keep it in 450Hz horn. The smaller horn would be better in this case.

jessie.dazzle wrote:

You are saying that the S2 has an increased output around the 1250 Hz range. I don't contest this, but at the same time, I have not measured what exactly the channel is now doing. The current configuration (450 - 2 KHz), was arrived at one night while woking... I just dropped everything and swapped caps and coils in a sort of gut reaction to something I had been trying to identify, which that instant became more clear to me. In the same little frenzy, I brought down the upper knee of the upper-bass horn. The result felt immediately right ... Again, I have not yet taken out the RTA and measured what either channel is now doing. When I do, I will most likely confirm the increased output of the fundamentals channel around the 1250 Hz range, at which point I will of course immediately perceive it as "problematic".

Well, when you go with RTA for each channel then you might see what I mean. Nowadays sufficient RTA solution is very comfortable. For MF range do not need even to be crazy and the regular build-in Laptop’s soundcards are good enough to make rough but in most cases very adequate measurement of response. All that you would need is $50 USB microphone and one of many free software. From certain perspective you do not need even calibration of your mice and your soundcard and you do not care about absolute number but you would need RTA juts to get more or less objective control over relative numbers. Your ears will calibrate the RTA that you are accustomed to use better then anything else. I am sure that people who express long words about loudspeakers would fund what I juts proposed as sacrilege but they need to understand own limitations…

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