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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Hello first, as I am new on this site...
I have tried a number of high Gm pentode/triode tubes, including E55L and, of course, 7788. All are very linear when used as triodes, but do not bet on very low noise, if that is what you would be after. Th...
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Yes, Jessie, but in case you decide to go for DSET, would it be multi-channel Melquiades or anything else, then your consideration for type and topology of the lower bass would greatly dictate requirements for your DSET. If your lower bass channels r...
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For me personally, midbass is the most important frequency range when it comes to sound reproduction. I believe you will be on the right track to focus on this range because so often it is overlooked and treated with superficial attention, as a "...
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[quote user="hagtech"] I run the driver tube at 170V @20mA. I don't think you need to run this tube at high current. It is very linear with wide signal swings at this bias. [/quote]
Good operation points for use it as a driver. You might...
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Fostex T 500A MK 2 Horn Super TweeterArticle By Bill Gaw at www.enjoythemusic.com
As most of you know by now, I'm a horny type of guy. While my wife may dispute this, my audio system (actually my second partner) would have to agree as all seven spea...
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Hi Romy and all,
first of all, my name is Henry, with a "Y". due to an Irish grand-grand-grand father called "O'Henry". the O' was deleted when my grand-grand father was born, due to a silly servant of registry office. :-) all my horns uses the calc...
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[quote user="mjloudspeaker"] Romy the Cat wrote:A could years ago here and there begun to pop up small SS class “D” amplifiers made with high-end pretence. They all sounded like shit but by the efforts of a number of typically deaf and stupid or just...
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[quote user="haralanov"] Yes, you are right. Power – you have almost unlimited power. Dynamics – you have as much dynamics as you want. But there are a lot of associated problems with that kind of dynamics. The following illustration is taken by ...
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A six year ago or so when I played with different compression drivers I bought a pair of Dukane 5A540 and at that time I was not able to find any information about them. Nowadays I was pointed out that an eBay sealer “ bayleafs” actions a pair of Duk...
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[quote user="drdna"] Well, I think the short answer is yes.
What the people over at Technical Support have told me is that this is due to the power supply design of the amplifiers that are being driven by the PP2000 and that it seems to be cha...
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Doug, it is a lot of tuner went over your hand. I wonder what drove you to do so. Was any specific quality of sound that you were looking and the tuner that you own did not serve you?
[quote user="doug s."]romy, there is a tuna freak in los a...
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Another interesting thing: why not a lot of people make the single ended hybrids? I understand that single ended output has very low efficiency but still: it is only about the heat dissipation. I have seen some single ended SS amp. There was a strang...
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I’m new to this outstanding website and I found it has really educational value and antimoronizating information :)
I’m still in the world of direct radiators and I’m looking for the ultimate midbass channel solution. At this time it’s still impossi...
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[quote user="mem916"]I think there must be something to the theory that there is debris down in the grooves that the VPI and other similar machines cannot get out, based on the difference I hear after cleaning with the new machine. I admit that I ha...
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[quote user="Marc HENRY"] For this Musique-Concrete horn system called "Grande Castine" (it was developped in Saint Cast Le Guildo, Britanny, France, from were females inhabitants are called "Castines" ) i prefered a modified 60Hz Le Cleac'h cylindri...
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I was pitching before that to make a loudspeaker with integrated LF module you have no ethical right to charge more then let say $20K retail. If you charge more then you have no mechanism to deliver anything for the money people pay. However, if you...
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Yes, both ends of the spectrum are tough to integrate with a quality MF.Of course, electrostats have no "push", but they seem to do all right (understatement) just supplementing way up there, in an array.The thing is, the "big" ribbons and 'stat...
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OK, Petar, I was finally able to take some time yesterday to focus and meditate on this. I remembered a host of "old" drivers from my past (not old at the time...) that, if memory serves, sounded rather muffled and slow, with humped response, as "he...
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The 10" "woofer" is well known to "high-end" designers, who love the "fast" bass, and I have to admit that Wilson and Dunlavy (among others) have also managed to get some impressive (at least for a while...) "dynamics" from the little woofers. To lo...
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OK, Romy, that EnABL stuff got my attention!I can't recall all of the bad ideas borne of good research, but this EnABL thing sounds a little fishy, and certainly it sounds too good to be true, as existing in a simple and really useful form. Can...
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LED facade:Mind blowing!One thing is LED in the circuit as an indicator lamp or, say, SS bias and another is a LED bulb.The bad element in the bulb is the RF generator. The LEDs in the bulbs are not fed with DC or line freq. but withRF square wave. S...
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This, from my prospective a superbly truthful article, was written by a Russian guy A. Polakov. I do not know who he is but the accuracy of Mr. Polakov’s experience regarding the subject and very similar Mr. Polakov’s and my observations of the issue...
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I have no idea what this Tweeter is. The reference to the aerospace aluminum alloy and Lamborghinis very much suggesting that the tweeters are crap and the guy who make them an idiot. But will not be too fast with conclusion and I am accustom to see ...
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This is the last article in the planed overview. Here I would like to cover options available among commercially available High-Efficiency systems. As you might expect it will not be too exiting.
In a ways commercial systems inherent all problems of...
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Thanks, Roman... I strangely (?!?) feel me like a schoolboy at his first primary schoolday... virtually ALL my (limited) audio knowledge, vanished... and I'm dealing with brand-new problems, like a crossover with fixed slopes and cut-off frequencies ...
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[quote user="N-set"] Amir wrote:Funny video from Acoustical systems and Wilson Benesch Turntable systems, lots of marketing hype in their presentation and finally the sound is dead crap.Wilson Benesch Marketing hype: "the future is carbon" finally yo...
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[quote user="samuel33"]Can you explain Roomy your points ?Because you say all the time what should be an intresting path but you never tell why. Why high efficiency mid driver would be an improvement? why higher effeciency would increase the sound qu...
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Here is the general specification for the parts that I used. The selection of the parts implies some liberty of course. It will be your amp after all, not mine - do whatever you wish. In some case when I feel that requirement is critical I will stres...
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The past 6 - 8 months I have been living with very efficient speakers (~ 109dB/m/w) driven by low-power SET amps. The amps use 300B output tubes for about 7 wpc. On paper, this should be a match made in heaven. In fact, the combination is capable of ...
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Well, I think the short answer is yes.What the people over at Technical Support have told me is that this is due to the power supply design of the amplifiers that are being driven by the PP2000 and that it seems to be characteristic of certain types ...
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