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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Forgive my complete ignorance in the speaker design, but if Edgar is right and the passive radiator has to be the last one, why not adding a sub with a passive? A sub with the same 8565 as a passive?
I hear you re the injection,...
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I will wait for the Quantum version of that...Seriously, that thing (and the explanation) seem something people saw as the future in 50's.Synergistic Research was already working around those kind of enchantment products for while, but they are still...
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My sub-bass amp is back but I am not sure if I am comfortable with it. The guy from QAudio did a wonderful job to fix my modified B-2 power amp and now I have my amp for ULF with passive line level filter in it. So, Now I have two identical, fully fu...
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I was reading the Stefano Bertoncello's post about his new multi-amping again options.
http://twogoodears.blogspot.com/2010/09/multi-amping-again.html
.. and I feel that it would be a good idea to brief summarize multi-amping cros...
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I have had a Placette Active for some 5 years now and it was quite a revelation when I put it in my system. According to Guy Hamel one of its most important features is its powerful op-amp output stage with an output impedance of 10 ohms. Since I hav...
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Hi,
[quote user="dazzdax"]Hi Romy and other fellow audiophiles, what is your experience with passive transformer based preamps?[/quote]I have yet to find anything better. If using active try using a TVC as volume control, it takes the active preamp ...
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Is there any abstract value to going for a preamp with a stronger output if you're using a passive xo at line level?I'd prefer to answer this question myself but i really don't have the budget to be swapping amps.How does a PLLXO interact with a non-...
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Very interesting discussion. I have taken a close look at Marco's horns and am thinking about using them in a horn installation. I plan to use the TAD 4003 from, say, 1 to 8 kHz, and a tweeter above that. I would love to use horns below 1 kHz but wil...
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And there is no substitute for listening to it, no matter how careful the "calculations". Anyway, I don't have it "figured out", that's for sure. Some guys figure in and use the inductor DCR in lieu of resistors (apropos), which seems clev...
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[quote user="floobydust"] Integrating multiple amplifier sections and drivers is always a challenge. Doing it with different topologies and OPTs adds some additional complexity due to the difference in response characteristics. Crossover design...
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Paul, I do not think that “before or after RIAA losses” requirement has any merit as no matter what kind type RIAA filter is being used it always will lose around 20dB. I do not think also that there is a “safest path” or “reasonably affordable”....
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I have to admit the it is very slick application of the old concept, very compatible with the décor objectives of many urban yahoos. An Italian company en&is is making them and I do like the idea
http://enandis.com/en/designs/megapho...
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My sub-bass amp is back but I am not sure if I am comfortable with it. The guy from QAudio did a wonderful job to fix my modified B-2 power amp and now I have my amp for ULF with passive line level filter in it. So, Now I have two identical, fully fu...
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Romy,one thing that interest me is you use an active RIAA and the Allnic is passive circuit if I understood things?...
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Anthony, congrats on your amazing progress! I know how hard it is to carve out time for this stuff! I see you are looking for gain from your pre-amp, which makes me wonder if you have been using the passive Placette, as opposed to the active unit, wh...
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[quote user="Romy the Cat"]The line-level crossovers work against fixed impedance and therefore the crossover point and the time alignment does not fluctuate along with reactance of the drivers.[/quote]Okay, maybe this is a dumb question, but why wou...
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Albert, the Adjustable Hydraulic Dampening might be effective if the vibration of floor is the factor. This is exactly what I question as I do not feel that the floor vibration is a problem. Considering the length of the waves and the amplitude of t...
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I absolutely remember posting about A vey special "vintage" EQ a while back, perhaps in the context of LF; but I can't remember more than that.IMO, the 1st order of business is to avoid the effing "DSP". Let someone else get it right ONCE, then ...
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Preferring transformers to resistors.
Brian....
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Hi Romy and other fellow audiophiles, what is your experience with passive transformer based preamps? Is this the ultimate way to get a perfect variable gain? Or do you prefer to use an active preamp?Chris ...
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44 dB "net" gain seems only a little odd for a MM phono amp, and it may be that "net gain" is even less in this particular circuit. In any case, I'm guessing it still accommodates their own SUT; why not?
2kVA is indeed one hell of a power supply ...
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I think I wrote In the past here, if you like the 10” Tannoy, why not try the 12” or 15”? The ones with rubber surround are not so good in my view (from CPA or DMT series as they have very restricted midrange) but the cloth surround Tannoys are wort...
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The Fs resonance does have its width BUT that means that the 30 Hz PR resonance out of my example is excited when the driver is not exactly at 30 Hz (not that a 30Hz PR can resonate at 32 0r 28Hz!). By definition a Helmholtz Resonator has one frequen...
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[quote user="guy sergeant"]I'm not really concerned whether passive eq no feedback pre-amps have recently become fashionable. I've been using them for 15-20 years. They've always sounded more natural to me. Most commercial implementations that I...
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Hi, true thats why i wrote designated amp (Active). As a passive xover thats rather difficult, so try a low Q filter type that increases steepness slowly. Like a Bessel (Q 0.585) or if youre skilled calculate your own Q smaller than 0.5 (LR) as a 8-1...
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Yes first order passive .Drop him an email, http://www.cessaro-horn-acoustics.com/kontakt.html...
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Hey, look what I found: 3’5” passive radiator with 30Hz own primary resonance! That is what doctor ordered!
http://www.tymphany.com/830878
Not to mention that this beauty costs $12!
The Cat...
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An interesting guy. I would love to discuss with him a few points, not that he prolamins anything (unfortunately) but I would certainly can bring some complex questions to the table that make his presentation more applied...
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If you do not like digital volume by Weiss there is always the passive alternative: http://www.designwsound.com/dwsblog/?p=1699...
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Well, if you do not have anything user 35Hz and have low sensitivety then the passive might do. Still in future, when you feel comfortable with your passive unit you might for the sake of self-education try an following experiment: Guy Hummel use to ...
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