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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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...to obsess about speaker wire. Thinking about this a little more I realise that my preference for foil cables has always been in relation to speakers with passive crossovers. DSET is much more simple, the amplifier is driving the transducer direc...
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I've been thinking about how I am going to wire these Bass Cannons as well as the horns on the horn stack. For some time now I have preferred ribbon/foil speaker cables for the relatively low sensitivity speakers I have been using. The reason I bel...
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Thanks Romy. To be honest they look better in the flesh than I had thought they would so I am very happy with them. I think I'll make the steel order today so I can finish them at my leisure.If I end up with 8 drivers a side, which is what I am pla...
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I have finally put together a half-stack of my Bass Cannons concept.The four Cannons wired in parallel and stuffed according to my previous trials on a single tube end up with Fs=41.7Hz and an impedance response as shown below......which means that w...
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Hi Romy,The first graph is the Right Channel (not the left as stated - therefore it is identical to the second graph) and the graph with the Scanspeaks is missing. I'm interested to see what you have measured.Regards,Anthony...
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[quote user="Romy the Cat"]Anthony, one more very important tip I would like to give to
you. Churchill (is I am not mistaken) once said that if you want to confuse
people then give them facts. The point was that facts do not clear anything,
the im...
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In my experimenting here, not really listening mind you, it looks like you can get a very nice frequency response to about 150Hz with those Scanspeak woofers. This frequency sits about where your Upperbass is rolling off so there is also the (distan...
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Romy,Is a new cabinet for the Scanspeak drivers an option? Have it the same width facing you but just make it deeper so that you can group the drivers closer together while still maintaining a similar volume for the drivers. That way you could stac...
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As it so happens I have some melamine here and I cut up 5 x 1" thick discs and pushed them into the middle of the tube (I also trialled 1 disc and 4 discs) and while they removed the resonance they did the same thing as the high density fibreglass ba...
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Thanks Josh,I tried the "stuffing in the middle of the pipe" and with 2 sheets in the middle managed to get very similar results to 4 sheets placed at the far end of the tube, but with a steeper SPL curve. I then tried lower density stuffing and man...
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I realised this morning that I have done a "not-so-standard" thing in using leftover fibreglass batts for stuffing the tubes. The batts that I have on hand are high density batts, not the low density type of fibreglass that is usually used for stuff...
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So, I have finally started testing a single Bass Cannon in my room.First, I had to get the rigidity as high as possible and then damp the steel ringing as much as feasible. I used butyl rubber/aluminium automotive deadener on the inside of the tube ...
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[quote user="Romy the Cat"]Last night I did an interesting experiment. I took the bass towers,
just 4 driver per side, crossed them at 90Hz, line-level and drove them not
with the Milq’s bass channel but with SS Yamaha B2. I use it with the tube cr...
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[quote user="Romy the Cat"]Another this the I at this point has no idea why in my use
of ULF channels. I mean I do not use it as it does not sound right. This is strange
because it is VERY same ULD that I had before and that worked very well in my
...
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Many thanks Romy, that was just the info for which I was hoping. You could say that Macondo is a base 8 audio system: 8' tall, 8' apart and 8' listening distance.Regards,AnthonyEDIT: The dual 15" midbass boxes look neat and are smaller than I would...
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[quote user="Romy the Cat"]I will be moving to 8.5 -8.5
configuration as I feel it is more suitable.
No matter how large the room is I feel more comfortable with shaping Sound
in a small area. [/quote]Romy, is this 8.5 feet measured from the driv...
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Mats, your sig says Chicago but you type like an Aussie. One thing I have learned in life is that you almost never get good results unless you stay objective. I just want nice soft bass......
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[quote user="Romy the Cat"]Jorge, your comment about
the physical instability of the pipe stack is well taken. I think if it is gone
from metal then it is possible to make it steady. In the way how Antony want to
do the pipe feet I think it might ...
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[quote user="Jorge"]Hello Anthony,I did experiment with metal tubes for bass in a sealed configuration as you are planning. The weight of them, even made out of thinner than you would like steel, is prohibitive. If you make them out of aluminum pipe...
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Romy, thanks for the explanation.
I was not sure if you still kept an eye on that thread Romy. As far as I know you need to be logged in to view the images in the diy threads so I will post a couple here to show where...
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[quote user="anthony"]...you've got me thinking about this now. I'll talk to some people here and see what they think, but it should be easy enough to place a shield between the OPT's and the tube bases.Thanks for bringing it up. I am looking for o...
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Lucas Cant from Black Art Automation in Melbourne. I cannot recommend him highly enough....
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Jarek, the best source for these big Nichicon electrolytics that I could find was Digikey. They were substantially less expensive than other sources that I tried but do ship from the US which is an added freight cost. I purchased these a couple of ...
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Below are some images that show the locations of the various filter caps within the amplifier chassis.The big cap for the First Stages is located directly below the 6E5P tubes...The big filter cap for the Bass Channel is adjacent to the Bass OPT (pee...
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...you've got me thinking about this now. I'll talk to some people here and see what they think, but it should be easy enough to place a shield between the OPT's and the tube bases.Thanks for bringing it up. I am looking for other angles to view th...
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[quote user="N-set"]Which CAD software are you using? [/quote]Google SketchUp....
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[quote user="Paul S"]Anthony, it sounds like you have given a lot of thought to damping structural vibration. I was referring to the electro-magnetic fields thrown by transformers, and - based on my view of your perspective drawings - I was wonderi...
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I would contend that most of the microphonics and feedback in valves is usually caused by the resonances and vibrations of whatever they are plugged into. Glass is very rigid which is only enforced by the shape into which it is mol...
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[quote user="N-set"]Anthony, I'm sure you realize that air springs and bearings can only isolate from the structure born vibrations. Placing the tubes so close to the speakers you give them a great chance to catch strong airborne vibrations. Or will ...
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[quote user="manisandher"]I hope you'll be open to having visitors once it's all up and running. I'd love to come over if I happen to find myself Downunder any time.Mani.[/quote]You would be most welcome Mani. It would be nice to meet you....
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