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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Since room acoustics are important, I'd like to share my thoughts on this device I recently acquired. This is not a review but some thoughts on how this thing changes the sound of the room, because that's exactly what it does, and in my opinion, only...
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Romy quotes in blue (pulled from the "Adding one more channel to the Macondos" thread) "1) Make sure that your cone is properly center in a gap. It is very important as misaligned cone will do compression at bottom end"
I feel confident that I am ab...
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[quote user="AOK_Farmer"] Here's what I've been trying. 8 ohm 4.5 inch full range Omega driver in a 0.35 cu ft sealed box and 6 mH coil 200 Hz electrical crossover. The main speaker is JBL Array 1000. This full range driver has my favorite *tone* of ...
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Here's how I'd make a hard rear cover/rear chamber.I describe the process in detail, as it is a good investment of my time; I expect to have a similar condition and requirement for my own mid-bass horns (intended for use with AK-151s).This approach c...
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Romy is being very kind to me and not shouting at me for wasting everyone's time.Paul, I really do not think that lipstick on a pig get's to the heart of the DX 4 transform. It's much more like a stick of dynamite hanging from the pigs lips and...
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Romy,In the diyaudio thread on EnABL I cover the Hemp acoustics FR 4.5 C and the Lowther A45. Both drivers in your size range.Since EnABL does not measurably alter any compression wave characterisitcs of the piaton mode tests, except for phase shift ...
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Bud,Thanks for pitching the A45a and FR4.5, I never dealt with both of them and will consider them, though it is slightly disconcerting that all those drivers meant to be wide bandwidth and therefore have too much HF in them. Still, my initial candid...
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And now, going back to page 2 of this thread; here we pick up with some shots of the upper bass horn and the associated primitive "tooling"Mold without coreMold with core. Before core is put in place, mold is loaded with a thick coat o...
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In fact I posted a question to Wolf and he replied that he can produce the coil of any voltage the customer would like to have. That is good. The below is data by Wolf von Langa:
MI-1428 - original version of the RCA 1428 - especially made for...
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[quote user="Paul S"]My results so far agree with Romy's theory, that the paper horns begin to eat energy when I used them "too low". In this case I used 4-600 Hz with 6 dB roll-off.[/quote]Thanks, this gives me somewhere to start. I am considering ...
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Quotes from Romy in blue :I do not see that you imbedded into your plaster construction any tightening points from a stronger material. I mean: the holes in plaster – how strong you will be able to tight the bolts before the plaster will give up? Did...
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Hello Malinowski,
Sounds like you may already have the necessary experience in working with plaster, but in case you're not used to making anything this large:
For the final horns, especially if they are large, use hard modeling plaster. My up...
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Paul S wrote :
"...Jessie, you know I am not a horn guy. I played with horns for 5 years, and I have heard plenty of them, and so far none have worked for me, musically. But I have remained mindful of horns' potential, and I keep coming back ...
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Romy's quotes in blue:Daniel J. Plach's quote in green:"...The back chamber mechanism is good. Are you planning to do the same in the midbass horn?..."Yes, it will be similar, but more robust; I have an idea for a locking-type seal, which I would pro...
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Thanks for your comments Romy.
You should like this bit of news... I forgot to mention, these will be round-section horns...
And yes, they will be very heavy... Made from a metal armature and very thick, natural (hemp) fiber-reinforced, plaster...
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Here's what I've been trying. 8 ohm 4.5 inch full range Omega driver in a 0.35 cu ft sealed box and 6 mH coil 200 Hz electrical crossover. The main speaker is JBL Array 1000. This full range driver has my favorite *tone* of all I ha...
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Thanks Romy, Paul, and Ronnie for the comments and encouragement :
Here are some responses :
1) Rubber gaskets :
Maybe it is not so important to have an “air-tight” seal (???). The rubber gaskets are there to seal the cover to the rear chamber...
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