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Thanks, Jessie. I just will buy that Beswick Engineering valve, it looks like it is the right size and it look like it will do what I need

I made some experiments applying large gaskets to cover of the back chamber. I used a gaskets up to 12 mm but I did not detect that it impacted sound in the right direction. In fact the maximum chamber size that I was able to get with gasket sounded virtually identical is the default Vitavox chamber size. A 1-2mm crack into back chamber, however, made all different. I will be very enthusiastic to hear your feedback when you try it with your 180Hz horn. The 700Hz first order or the 450-500Hz second order will do, though I do not know if you will be able to stress enough the bottom response of that horn with S2 driver.

As I told, I am as now undecided about the benefits of the S2’s back chamber leaking for the Fundamental Channel. The sound is unquestionably and uncontestable “cleaner” but there are a lot of other things that I would like to consider. For whatever reason that cleaner sound from Fundamental Channel creates overly-necessary “directivity” in sound. The defaultly-damped S2 has it its bottom knee a minor touch of nozzleless, it sounds if it “chough a cold”, it has that hazy, smoky vale that sets an atmosphere of “noble mysticism”. It might have overwhelming amount of measurable distortions but at the same time that refined, superbly articulate and very intelligently-dosed nozzleless, in contacts of proper mixing with the rest of Macondo, can do some tricks, even purely Audio tricks, that are hardly imaginable with others drivers or topologies.

For instants I like set the Fundamental Channel (if recordings allowed of course) that the sound of violin sections are handled by Macondo MF directionally but the sound of English horns, flutes, oboes (if the playing of the give piece and orchestra intended to) is completely  non-directional. A properly set up Macondo, while maintaining extremely strong and very precise imaging for entire orchestra can throw horns or flutes from nowhere, almost like it is out of phase, coming from everywhere, and then, if the players/conductor willing to, then it capable to set the horns at the very precise position right where they should be for a given recording. What I detected that “leaked S2” driver has much cleaner, much much much cleaner sound but it doesn't have that foggy capacity to sound like it come from “nowhere”. It is too directional and too “straight”…

This subject is required more experiments, but to catch that fish would require a clean pond… The electricity now is so bad that it is okay to listening music but it is virtually impossible to do Audio. So, I would propone my further experiments for later, preferably when six-channel-Milq will be up and running, or perhaps you will come up with further observations.

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