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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote user="jessie.dazzle"] Have you tried taking a measurement with the line arrays moved to the rear of the room? (ideally, he same as the current distance from the listening point, but behind you). [/quote]As I said I moved them everywhere.[q...
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[quote user="jessie.dazzle"]I should mention that with all the wonderful things it does, the L2 (preamp) definitely deserves a fresh pair of 12AX3s and a 6C19P. (I have not changed them since starting work on the horns... all tubes are exactly one ye...
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Dominik, Jessie is right - it is irrelevant the precession of your profile if you horn does not go to high into HF. The LF gain of upperbass horn happens in the first half of horn anyhow. I do not insists that I am right but I have a hypothesis that ...
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[quote user="jessie.dazzle"] For a lot of reasons, I'd vote for an alternate placement. You've got that basement, so why not use it as a rear chamber? You might be able to use the volume "as is", without building a proper rear chamber. In this ca...
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[quote user="jessie.dazzle"] Scrolling down to the images of the Lamm ML2.2, I see something that intrigues me...
Four ML2.2s are used to bi-amp the Verity Audio speakers; I didn't know they could be daisy chained by using both the XLR and RC...
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What problems with the Johnson sockets are these trying to solve, again? Would they really be better overall than a lower mass design along with chassis through-holes, like the ML2, etc.? If a reader is using these, do they appear to better stabiliz...
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That's horribly disappointing for now but I think Jessie is right.Firstly, as you essentially said, I wonder if the horns are coupling into the room such that you actually have much bigger devices than you thought... you are actually sitting inside t...
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Laurent:I would be VERY careful about "rocking" the 5651 in its socket in an attempt to establish better contacts. I have "split" the glass envelope near the pins on a couple of 5651s doing just this and I did not realize it until the sound got scar...
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Jessie, you just set your DMM to VDC and put the probes in the holes next to V2. Like Romy said, because of the clever arrangement, the reading you get in VDC corresponds directly to what you'd get if you measured mA (if you could actually measure i...
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[quote user="jessie.dazzle"]7) Location of power amps : Yes, the power amps sit within the frame, on their own sliding support between the Upper-Bass and Upper-Mid horns. For the moment I am using a pair of ML2s from 60Hz and above. (below 60Hz I use...
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[quote user="jessie.dazzle"] Your latest post got me thinking in a sort of incomplete way about how you might locate the injection channel... If you consider tone as a harmonic of the original source, then (depending on the order of harmonic) it may ...
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[quote user="jessie.dazzle"]Romy, I'm very pleased to learn that you've got your Injection Channel done. I assume the above illustration is not indicative of the way you have the Tannoy Red aligned with regard to the other drivers, as it appears to b...
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[quote user="jessie.dazzle"]No interest in listening to half a system... Just pushing myself to get on with the manual labor... It is somehow like therapy.[/quote]Yep, it is interesting how awareness works – since a result is conceptualized and envis...
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[quote user="jessie.dazzle"]I assume the above illustration is not indicative of the way you have the Tannoy Red aligned with regard to the other drivers... [/quote] Here is the actual picture of the Injection Channel, installed and time aligned.
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Sure, contemporary polymer concrete can be made suitable for speaker enclosures or horns. Its biggest sonic benefit is that the material itself is fairly non-resonant. It's just a bitch for a DIYer to make one after another while experimenting with s...
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Yes, Jessie, this is the direction that I am contemplating - to put up a vertical poll to support the attic main beam and to cut the 4-5 diagonal lowering beams that lead to my working triangular wall. Also the residue of the attic roof under th...
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Jessie, yes from a perspective of general horn propaganda your post it correct but from the perspective of “reading the back side of the midbass speed bump” I would argue that it has nothing to do with horn loading. Look at the notion widely. I would...
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Yes, Jessie, the idea of the triangle horns with some kind of location of the drivers is what I was thinking as well. This week my attic, the walls, the beams and all the rest of the things will be expected and we will convert it to AutoCAD. Then I w...
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[quote user="jessie.dazzle"]
Why they are called NOS, I have no idea.jd*[/quote]It usually stands for Non OverSamplingGaston...
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Jessie:Incredible project! Surfboard makers or large boat supply companies may have a view regarding similar resins and fiberglass available in the US.I could not figure how you managed to injure you back but now it is abundantly clear. By the way, ...
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I think I understand better now. It is difficult for me to find storage for the endless little audio things around my house. Good luck on storing an extra pair of 20' mouths!On a different note, there is the issue of materials, mass, and damping. ...
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[quote user="jessie.dazzle"]Though I have tried to improve my odds through research, and though I am integrating variables where practicable (variable volume rear chambers, horns independent of room structure and therefore mobile), in the end, I'll b...
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[quote user="jessie.dazzle"]I didn't know rigid (hard) foam was available in a spray can. Be careful; if you're using proper rigid foam, it expands with great force and would likely push through any tape protecting the cone of the driver.However, the...
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Jessie is correct about the forcefulness of the expansion of many over-the-counter foams, like generic Great Stuff from Home Depot, etc. In fact, many homebuilders were having problems with the foam they put around door and window frames, etc. durin...
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If it was not clear from my oblique comments before, I agree with what all have said, DAC1 seems to be techinically more correct but at the expense of some information loss. DAC2, which I prefer, has more distortions but also has more complete ...
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Jessie,I just managed to snag a used Wavelength Brick version 1 for a very good price. The Brick and Cosecant v2 use the same DAC section, unless you purchase a newer Cosecant v3 that is offered with an upgrade to a multi-bit 24/96 DAC chip. I listen...
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[quote user="jessie.dazzle"]Next time I'm making them from a double wall of 3/4-inch plywood sandwiching two inches of sand.[/quote] I do not know if that would be truly necessary. For sure it will not hurt and will be better but ULF that works with ...
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Pretty freaking cool, Jessie. So, where can you put this monster where you can still get far enough away to listen to it?!?If you pursue this, you might tack weld or screw on expanded metal mesh between the ribs of that behemoth so you&nbs...
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Let me start with a correctoin :Jessie Dazzle wrote (post dated 09-28-2007):"...So the 180Hz horn is currently handling two octaves (electronically), the 400Hz horn is also now handling only two octaves (electronically)..."This should read as fo...
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Jessie, do not forget also while you do your alignment experiments to listen the system from different distance. Get a reference whatever it is and then make a step back and a step forward. Try to discard the upperbass changes and pay attention only ...
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