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Read the Post in new Window Read the Post in Threaded view  Post #248: Blending passive with passive? by N-set on 2022-10-27 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
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,...

Read the Post in new Window Read the Post in Threaded view  Post #251: Be careful with passive radiators by rowuk on 2022-10-28 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #149: Which passive radiator by N-set on 2021-12-21 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
...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. ...

Read the Post in new Window Read the Post in Threaded view  Post #351: Active Debugging vs. passive lambing… by Romy the Cat on 2009-07-06 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[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...

Read the Post in new Window Read the Post in Threaded view  Post #3: The active and passive crossovers are not the same. by Romy the Cat on 2010-09-25 
Browse the content of the threads in new Window  Thread: Multi-amping crossovering. in Audio Discussions  6 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #59: Ist order passive by coops on 2007-07-20 
Browse the content of the threads in new Window  Thread: The most promising “best” commercial speaker in Horn-Loaded Speakers  192 Replies 
[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...

Read the Post in new Window Read the Post in Threaded view  Post #21: Piano success and passive x-over by Ronnie on 2007-08-31 
Browse the content of the threads in new Window  Thread: Macondo copying: Horns troubleshooting in Horn-Loaded Speakers  24 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #6: The misery of passive crossovers on bass channels by Romy the Cat on 2007-12-20 
Browse the content of the threads in new Window  Thread: The European Triode Festival’s horns in Horn-Loaded Speakers  57 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #5: Active vs. Passive by Paul S on 2014-06-18 
Browse the content of the threads in new Window  Thread: Expressive Technologies Model 1 preamp in Analog Playback  6 Replies 
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 ...

Read the Post in new Window Read the Post in Threaded view  Post #33: LCR active vs. RC passive by perrew on 2009-11-09 
Browse the content of the threads in new Window  Thread: The LCR RIAA correctors in Analog Playback  57 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #3: The missed war of active vs. passive isolation by Romy the Cat on 2009-12-10 
Browse the content of the threads in new Window  Thread: Is better than Kinetic Systems’ Vibraplane? in Analog Playback  3 Replies 
[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 ...

Read the Post in new Window Read the Post in Threaded view  Post #8: Passive only via Q by martinshorn on 2018-03-09 
Browse the content of the threads in new Window  Thread: Coral x-viii in Horn-Loaded Speakers  11 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #233: Large Tannoys with strange passive radiators by noviygera on 2022-10-25 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #259: Passive Radiator Part2 by rowuk on 2022-10-29 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #44: Ah, the beautify of the passive EQ RC phonocorrectors: Lamm LP2 by Romy the Cat on 2004-12-11 
Browse the content of the threads in new Window  Thread: Where are our good phonostages? in Analog Playback  61 Replies 
[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...

Read the Post in new Window Read the Post in Threaded view  Post #61: Yes first order passive. by coops on 2007-07-21 
Browse the content of the threads in new Window  Thread: The most promising “best” commercial speaker in Horn-Loaded Speakers  192 Replies 
Yes first order passive .Drop him an email, http://www.cessaro-horn-acoustics.com/kontakt.html...

Read the Post in new Window Read the Post in Threaded view  Post #8: Acive versus passive by Purite Audio on 2014-06-20 
Browse the content of the threads in new Window  Thread: Minusk: a new Vibraplan? in Audio Discussions  8 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #2: The Quantum version. by xandcg on 2018-01-29 
Browse the content of the threads in new Window  Thread: I am not a Nostradamus, I am better. in Audio News  1 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #181: The baby passive radiator. by Romy the Cat on 2009-07-13 
Browse the content of the threads in new Window  Thread: Macondo’s MiniMe or about Pilot Acoustic Systems in Audio Discussions  213 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #14: A passive linestages white flag. by Romy the Cat on 2005-03-31 
Browse the content of the threads in new Window  Thread: HELP: I’m a line-level looser. in Audio Discussions  22 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #4: Active, passive...try it... by Romy the Cat on 2007-03-12 
Browse the content of the threads in new Window  Thread: Another light for the LS tunnel: transformer-attenuators? in Audio Discussions  26 Replies 
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 ...

Read the Post in new Window Read the Post in Threaded view  Post #1: A passive but elegant presentation by Romy the Cat on 2023-12-04 
Browse the content of the threads in new Window  Thread: A passive but elegant presentation in Audio Discussions  8 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #13: Weiss Passive Volume by perrew on 2009-11-09 
Browse the content of the threads in new Window  Thread: Digital Volume Control self-assessment in Audio For Dummies ™  12 Replies 
If you do not like digital volume by Weiss there is always the passive alternative: http://www.designwsound.com/dwsblog/?p=1699...

Read the Post in new Window Read the Post in Threaded view  Post #41: Passive RIAA filters are good for full blown preamps… by Romy the Cat on 2009-11-09 
Browse the content of the threads in new Window  Thread: The LCR RIAA correctors in Analog Playback  57 Replies 
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”....

Read the Post in new Window Read the Post in Threaded view  Post #1: The iHorn - a passive amplifier. by Romy the Cat on 2012-05-01 
Browse the content of the threads in new Window  Thread: The iHorn - a passive amplifier. in Horn-Loaded Speakers  0 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #7: Passive XO sucks, for sure (but I live with it). by Paul S on 2007-12-21 
Browse the content of the threads in new Window  Thread: The European Triode Festival’s horns in Horn-Loaded Speakers  57 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #9: Passive or active XOing at 1 kHz? by Markus on 2007-12-22 
Browse the content of the threads in new Window  Thread: The European Triode Festival’s horns in Horn-Loaded Speakers  57 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #1: If you’re multiamping then use passive-line lever crossovering by Romy the Cat on 2009-01-21 
Browse the content of the threads in new Window  Thread: If you’re multiamping then use passive-line lever crossoveri... in Audio For Dummies ™  3 Replies 
[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...

Read the Post in new Window Read the Post in Threaded view  Post #5: Re: Passive transformer based preamp by Thorsten on 2005-10-26 
Browse the content of the threads in new Window  Thread: Passive transformer based preamp in Audio Discussions  41 Replies 
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 ...

Read the Post in new Window Read the Post in Threaded view  Post #1: Passive line level crossovers - re:pre amp by Dominic on 2007-01-25 
Browse the content of the threads in new Window  Thread: Passive line level crossovers - re:pre amp in Audio Discussions  5 Replies 
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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