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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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...do you use? Scan Speak 25W/8565-00? Do you also feel that the reduced 2cu feet volume works better than the original 3cu? I've just acquired a pair of nice looking Reds and think of moving slowly forward. My listening space is quite small.
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The passive radiator is simply put a closed box Helmholtz resonator with low "q". What does that mean? It means that the passive radiator only resonates at its tuned frequency and its multiples - regardless of the frequency radiated by the driven woo...
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[quote user="Romy the Cat"]
I do not want to go on tangent in this Cessaro Gammas thread, still what Merlin said deserves very much to be accented. I juts mention it once in here.
The first order on the bass units is NOT an “unacceptable compromise...
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I'm giving myself high fives today for nearly solving the broken piano sound in the room. :-)I'm not sure what fixed it, but I believe it to be a shelf half filled with records + two sofas and a carpet.There is room for improvement but it is a g...
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Paul, l I have written about it somewhere: the passive speaker-level crossovers on bass channels are no good. Marko has 250Hz that with 3rd order would be around 10mH and 2mH. With air core then would be very large coils with huge amount of DCR – ver...
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Romy,what I meant was why choose LCR active over a RC RIAA passive EQ?Is there a logical explanation for this or does it just sound better in your experience?/P...
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[quote user="Stitch"] When you look at the data sheets, you see, that they have different Hz range with different weight. A reason why I added some more mass to my Micro which is sitting on a VP. [/quote]
Actually it is not my observation. In ...
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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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Of course most of the people do prototyping the type of crossover they need for a given channel using active crossovers. As the crossover point, slop and in some cases Q are found then the same data is applied to a given topology of line level in-de...
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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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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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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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Alex,
yes, the passive linestages (resistors) tend to be more transparent then active stages but it is only in the case when a passive line stage (attenuator) sits right next to the grid of your input tube. As long as a passive linestage b...
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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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Paul the UK Accurion distributor was kind enough to bring a P4 same internally as their 'Silencer' he also bought some accelerometers , we were able to measure the turntable directly on its usual isolation shelf, (GPA Monaco) and then on the active...
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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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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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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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[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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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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