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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hmmm, the steel tension rods remind me of this:Note the graceful arcing member that in your case, is analogues to the rafters.Unless you make these horns super heavy, my guess is you won't need the rods. In the event you do, you might as well make th...
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Looks like you could put a couple rear chamber access traps on the roof, accessible from the exterior of the house. Is the central AC unit sitting up there behind those insulated ducts?jd*...
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If not for my current engagement with a race against the clock and the resulting manic situation, I'd offer to do the modeling work for you. As it is, I'm working flat out while symultaneously preparing for a very long-distance move. This situation h...
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Romy wrote:"...the common rule is to beef up the joints but I propose more elegant approach – to jam the horn by spreading the possible “micro mouths” vibrations. To do is very simple – slice the sections not perpendicular to the horn axis but at ang...
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skushino wrote:"...I was operating my amp around 275mA for the same reason as you, to have a margin before V2 runs off the cliff..."About that cliff... As a result of not fully backing off the plate current trim pots (thinking a few turns would suffi...
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skushino wrote:"...Today I replaced the problematic pair of Chinese 7 pin sockets on one of my ML2s... I believe these were the cause of burning through a couple V2s, and the wildly dynamic plate voltage readings..."I too have fluctuating V2 plate cu...
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The Anstendig Institute wrote:"...The attempt to reproduce the way sound is heard by means of stereophonic sound reproduction is a misunderstanding that is the result of a fault in logic..."Yes, it would be better to record each source of sound with ...
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To my understanding, taken individually, your attic horns would be more obviously working in a half-space environment. For any output that is common to both the L and R channels (some in the case of stereo recordings and all in the case of mono), the...
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Romy wrote:"...The material itself – what to use. I am wide open from any type of wood to synthetic panels (like cement panels). Perhaps it might be a combination of organic and synthetic layers..."I realize you won't be doing the work yourself, but ...
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msaudio wrote:"...Putting The Mid Bass horns behind your head will not work...do you thank you will be able to use any frequency above 80 cycles with rear fired horns that are behind your head?..."One simple way to get a feeling for how this might or...
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In my illustrations as well as in the construction of my own mid-bass horns, I let the circular section of the 8" throat run all the way out to the mouth; it is tangent with the adjacent walls of the horn at any given point. If I understand correctly...
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Thinking about your options, I would locate the driver at the top inside corner of the horns (horns viewed while looking into mouth), and develop the horn flare from there. See explanations below:Driver located high and inside: "Hypotenus wall" of ho...
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Absolutely flat response will usually sound as you've described it; listen to your ears. If you are hearing the opening bass line of "So What" via the sub, you must be running the sub pretty high in frequency to compensate for lack of mid-bass. From ...
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Romy wrote: "...The “competition for the best” syndrome is something that retarded reviewers brought into audio. This “frustration for the best” is the only crap they are able to sell and the only think how they meant understand audio. Unfortunately...
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I realize the question as to how you will get mid-bass (horns vs other solutions) is still open.If you do go ahead with horns, you should be able to make them so that they'll accept most any 15" driver, which means you could use the horns in making t...
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El`Ol wrote: "...And what about the brute force method (room correction for the bass arrays)? [Digital EQ]..." Romy wrote: "...Actually I am considering something like this... I think the final result might use some of your limp methods but the EQ O...
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You might find that you don't need that much power.When I first built the ULF channels I assumed they would require loads of power, so I bought a single, mono, 1KW class D amp to use in testing. Then I tried driving them with a pair of M1.1s that I h...
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Romy wrote:"...Jessie went for 23 cub feet, shall I go larger?..."For the McCauley 6174, I incorrectly remembered the ideal volume to have been around 23 cu ft, and that I had been forced to make a compromise; I was incorrect on both counts.I just ra...
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Have you tried taking a measurement with the line arrays moved to the rear of the room? (ideally, the same as the current distance from the listening point, but behind you).If you can do this, and if the result is a more gentle curve, consider bass e...
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26) Excrement will almost certainly mean experiment.jd*...
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Romy wrote:"...I use 10” but they have free air resonance of 19Hz. Not any of 18” drivers have such a low resonance..."Well if we can believe the manufacturer's spec sheet, it is possible to get close; McCauley claims a free air resonance of 20Hz for...
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What would be most interesting would be to capitalize on the possiblity you have to make use of the basement volume as an enclosure for the lower-bass channels. This wold however, almost certainly introduce floor vibrations requring that you find...
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You and I now have what seems to be very similar situations; similar MF and HF channels, in a room of similar size. However, I still have no operational dedicated mid-bass channels; you do. I have dedicated lower-bass channels; you do not. As is ...
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Facing similar issues, until confirmed or disproved by experimentation, the following represents my view:Situation 1):Mid-bass horns aimed generally TOWARD listener's ears: Alignment of the DIRECT OUTPUT of the horn for time arrival to listening poin...
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You might use a plinth under each component, and several placed in the center of the room. Then set up screw jacks spaced around under the center of the floor, under anything with a plinth and also under anything really heavy. The jacks would in ...
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Romy wrote:"...The big problem is that the listening room looks on reservation land and there are some very mean birds in there. At nigh they sound like car alarm – very annoying. I have discovered that when I flip the pool light then the birds s...
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That's good news.
?????? !jd*
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Romy wrote:"...I usually suggest to set your new 6C33C tube for operation of 250mA-270mA, use it for a while and only then set 300mA..."This is what I did; in fact, I've had to leave them set at 250mA so that during warm up they don't go over 310mA. ...
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After swapping all the tubes between the left and right amps, the cycling bias current issue (mentioned here in a previous post) seems to have settled.I now have another question, which I hope other ML2 users might answer; first the context: These am...
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First off, I forgot to mention an interesting observation: Before running the sweeps (previous post), since the drivers in the upper-bass horns are new, I decided to verify/optimize rear chamber volume (they are easily adjustable)... I wasn't expecti...
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