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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="noviygera"] I think clearing this up this may be of benefit to other users who are building multi-way horns.Let's say I've got two horns mounted on a frame. There's a high horn above and a mid horn below and they are physically time alig...
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[quote user="ulf"]One advantage of the use of a phase plug in a midbass horn is that it will beam less at higher frequenzies than a horn without phase plug. If the phase plug is designed for the specific horn and driver it will help "steer" the HF.
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Romy-In this thread, you previously said--12) If a
filter requires a phase inversion then it is preferable to flood
crossover point with amplitude and do not invert phase.What exactly do you mean by this and how's it work?thanks-d....
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[quote user="drdna"] Fundamentally I think the injection channel and layered sound are different things. The injection channel is designed simply to compensate for the timbral shortcomings of a particular driver. However, because of lobin...
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Ok, I will share with you some ideas that I have in my head how to deal with horn decay asymmetry. They are in a way the further development of the Haralanov’s idea of acoustic diode – the brilliant concept from my point of view.
Before I will...
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[quote user="Romy the Cat"]What however I would like to ask you is the subject that bothers me the most: how can you determine that the record is cleanable? So, my question is – how you differentiate the noisy record that might be cleaned and improve...
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I did one thing: I swapped the phase of one of my PS transformers (the heater one).My PS transformers are placed parallel side-by-side and super close to each other. Very wise, but I had no choice. I tried to wire the primariesout of phase to have so...
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[quote user="Paul S"] http://app.audiogon.com/listings/omnigon-full-function-tube-preamplifier-phonostageLooks like a serious effort that has been kicking around for a while.What tubes are used? Are they twin triode, like 12AX7 or - more likely - 692...
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Hey Boys, Remember even if you use a modern "pancake" compression driver, you still have no control over the flare rate the manufacturer used within the phasing plug. And most of the time they are not willing to tell you, or they don't even know...
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[quote user="rdrysdale"]Our bass driver has a 12v field coil motor, it developes just over 20 kilogauss flux density using a low carbon steel pole piece. The exit diameter is 4 inches at the moment. The diaphragm is 6 inches in diameter and made of a...
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I guess I would like to be able to do something better than anyone else - and still be better after 100s of years.....My take is a bit difference. When I perform with players with a Stradivarius violin, it isn't the violin that is impressive - up clo...
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Hm, SGSG-37FRP, Driver frequency band: 400Hz - 10kHz, 18,500 gauss SG-370, Driver frequency band: 400Hz - 18kHz, 23,000 gauss SG-370DX, Driver frequency band: 400Hz - 20kHz, 24,000 gauss Inversing, they build up magnetic density and extend HF. I...
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[quote user="Romy"]...what is your view about grounding of secondary in output transformer? I keep secondary lifted in the Super Melq as I have in there 6 phase switching relays...[/quote]Not sure I understand. You run the speakers floating fro...
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Hi all,In my experience it is VERY hard to get anything resembling realistic bass from a vented box, particularly with a Q of around 0.9 or 1. There is too much stored energy in the system and too much overhang. The best bass I have heard...
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I recently had a visit by a close friend, who is an accomplished modern jazz saxophonist but a recording/mixing engineer, running his own small studio. We listened to some bass-heavy material on my Dannoys, the bass was acoustic - piano and drums. Da...
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The fact is, typical "stereo" L and R separation is mostly an engineering hodge-podge to begin with, and any further messing with it will be very much settled by ear, whether at line or at speaker level. Yet James Bongiorno set out to "solve" the pr...
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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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[quote user="Romy the Cat"]It might be a good driver but the horn section of it is very much compromised to begin with. If I have it I would consider substituting the original TAD horn with my own spherical horn. It might be difficult as it might be ...
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OK, I have found the problem I had with my digital and
analog crossovers, now everything is consistent. It turn out that my contractor
why built for me the IB manifold confused the polarity of right and left channels.
I was not able to use the pha...
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DVORAK NEW WORLD SYMPHONY Antal Dorati The New Philharmonia Orchestra transferred from a London Phase Four 4-track tape, Dorati gives a dynamic performance, also the recording has a much more natural sound then majority of the Phase Four releases whi...
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Eventually I found hot to balance out the fundamental channel’s arm a 1 galloon bucket filed with led shot and Super Melquiades power supply do a good contra-mass.
I did not do a lot of listening but the very initial listing that I did are clear...
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[quote user="clarkjohnsen"] Thanks for the lecture on material I've been closely acquainted with for thirty years. But please don't try to dodge the issue, viz., that you erroneously said AC plug polarity has "nothing to do with The Wood Effect". The...
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N-Set, how do you plan to convert the 3 phase back to 1 phase? Also, it is likely that the whole house system uses the same ground. IMO, careful routing and keeping neutrals and grounds separate to the original ground bus is probably as good as anyt...
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Do we finally understand what part of the Bad Electricity problems is [broadband] noise and what part is related to "waveform" issues, such as phase? And do we understand how attempts to deal with either one of these issues might affect the othe...
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Heifetz recorded the Tchaikovsky concerto 3 times: with Barbiolli, with Susskind and with Reiner. Frankly speaking I do not like any of them. It is not that I “do not like” them rather they are like having sex with a marble-made women – the shape is ...
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[quote user="drdna"] To me, there are three types of problems:
1a) grime piled on top of a record1b) defective vinyl piled on top of a record2) scratches cutting into the vinyl
Type 1 deflects the needle upward and Type 2 deflects the needl...
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Yes a few ridiculous requests and statements there indeed. Full ridiculousness intended.
I know Dunnoy needs a lot of power and low impedance amp. My aims are not the same as yours here as I'm not concerned to...
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I laid my hands on WinISD speaker modeling tool, which seems to be quite popular and widely used. It can model passive radiators too.
Here are the simulations of my idea of the Dannoy bass: Scan Speak active + Scan Speak passive in the same bo...
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So, basically you built a wall on the right side, separating
the listening section from whatever it is behind the wall. A bold move. As the
room become slightly smaller and you lost some time for bass dissipation you might
try to drop the slope at...
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thanks I have a few questions to ask if you do not mind:
1) Did you experiment with surface of the horns and a negative contribution of smooth surface to Sound?Smooth surface are fine don't waste my time on a trival matters.
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