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Read the Post in new Window Read the Post in Threaded view  Post #30: The “Water Drop” and the “Bessel curve”… by Romy the Cat on 2007-02-27 
Browse the content of the threads in new Window  Thread: RAAL “Water Drop” tweeter for Macondo. in Horn-Loaded Speakers  77 Replies 
Well it is quite amassing discovers not the fact itself, it is well known, but the amplitude with which the fact demonstrates itself. I run the “Water Drop” at 12K second order but not against the tweeter transformer but against an 8R voltage divide...

Read the Post in new Window Read the Post in Threaded view  Post #30: The “Water Drop” and the “Bessel curve”… by Romy the Cat on 2007-02-27 
Browse the content of the threads in new Window  Thread: RAAL “Water Drop” tweeter for Macondo. in Horn-Loaded Speakers  77 Replies 
Well it is quite amassing discovers not the fact itself, it is well known, but the amplitude with which the fact demonstrates itself. I run the “Water Drop” at 12K second order but not against the tweeter transformer but against an 8R voltage divide...

Read the Post in new Window Read the Post in Threaded view  Post #54: The Water Drop - back to business… by Romy the Cat on 2007-10-31 
Browse the content of the threads in new Window  Thread: RAAL “Water Drop” tweeter for Macondo. in Horn-Loaded Speakers  77 Replies 
[quote user="Romy the Cat"] The HF Range “F” channel: The 6E6P-DR at 30mA connected at tetrode. The filter is second order with Sowter 9858 Pultec MEQ-5 EQ Inductor 420/277/145/108/61/34 mH) and variable air cap. The variable inductance and capacitan...

Read the Post in new Window Read the Post in Threaded view  Post #402: Taking turns out of coils in search of prodigious balance by Romy the Cat on 2010-11-09 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
[quote user="haralanov"]Are there any signs for worsened transient response of your midbass channel due to the sharp electrical filtering?[/quote]Nothing that I note. The transient response of your midbass channel is a bit tricky thing as the way how...

Read the Post in new Window Read the Post in Threaded view  Post #14: First vs. second order crossover and alignment by Romy the Cat on 2010-08-25 
Browse the content of the threads in new Window  Thread: Time alignment of drivers in Horn-Loaded Speakers  16 Replies 
[quote user="noviygera"] I want to listen to both 12db/octave and 6db/octave passive versions and see which one sounds better. And keep the one that sounds better. [/quote]Herman, It depends what you would like to listen. If you would like to ...

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 #12: Rolling off the tapped horn by Romy the Cat on 2009-04-29 
Browse the content of the threads in new Window  Thread: The tapped horns: cons, pros and Sound in Horn-Loaded Speakers  57 Replies 
I think it might be very interesting to introduce the high-pass filtration for tapped horn and to see how it behaves. It is not only about thermal overload and restriction of excursion. The unloading of none-used bass generally clean-up the transpare...

Read the Post in new Window Read the Post in Threaded view  Post #9: Love/Hate with Lowther by yoshi on 2006-11-17 
Browse the content of the threads in new Window  Thread: Lowther Driver in Audio Discussions  62 Replies 
I've been having love/hate relationship with Lowther (and its siblings) for several years now.  As you all say, it has many problems to use as a full-ranger.  Right now, my set up is a 3way multi-amp, Lowther (Reps 1) in Medallion cabi...

Read the Post in new Window Read the Post in Threaded view  Post #76: The MiniMe X-over by Romy the Cat on 2008-12-31 
Browse the content of the threads in new Window  Thread: Macondo’s MiniMe or about Pilot Acoustic Systems in Audio Discussions  213 Replies 
[quote user="serenechaos"]Did you use LEAP or anything like that, or just cross everything over 1st order as a guess, and tune by ear?  [/quote] Oh, no. I do not use any LEAPs or others tools, no time domain analyses or anything like this – the...

Read the Post in new Window Read the Post in Threaded view  Post #16: Sub bass hi pass by serenechaos on 2009-04-30 
Browse the content of the threads in new Window  Thread: The tapped horns: cons, pros and Sound in Horn-Loaded Speakers  57 Replies 
[quote user="Romy the Cat"]I think it might be very interesting to introduce the high-pass filtration for tapped horn and to see how it behaves. It is not only about thermal overload and restriction of excursion. The unloading of none-used bass gener...

Read the Post in new Window Read the Post in Threaded view  Post #6: Intentional LF delay. by Romy the Cat on 2005-03-21 
Browse the content of the threads in new Window  Thread: Horns and digital crossovers. in Horn-Loaded Speakers  16 Replies 
There are no set of laws in there - you have to play with it and then you might ketch something. Certainly for a proper bass reproduction (or generally music reproduction) you need somewhere around 1 sec decay in your room. You might have a large roo...

Read the Post in new Window Read the Post in Threaded view  Post #29: The new channel! Yes! I got it!!! by Romy the Cat on 2006-08-18 
Browse the content of the threads in new Window  Thread: Adding one more spherical to Macondo. in Horn-Loaded Speakers  92 Replies 
E-v-e-n-t-u-a-l-l-y!!! Eventually the new “fundamentals channel” horn sounds as it should being incorporated in my Macondo!  The key was the  second order. I really never drove compression drivers to their 500Hz as I always used upperbass h...

Read the Post in new Window Read the Post in Threaded view  Post #35: The “fundamental channel”: What a beauty!!! by Romy the Cat on 2006-08-23 
Browse the content of the threads in new Window  Thread: Adding one more spherical to Macondo. in Horn-Loaded Speakers  92 Replies 
Got today the parts and finalized the “perfect” Bessel passive crossover for my new channel. The coils are regular air-core 2.5H and 7H, the caps are Theta 10uF and the small wirewound tuning resistors that kills ~1.5dB in the channel. When I pu...

Read the Post in new Window Read the Post in Threaded view  Post #8: Order of the filters in Macondo-like configuration. by Romy the Cat on 2013-03-08 
Browse the content of the threads in new Window  Thread: For one day only in Horn-Loaded Speakers  12 Replies 
[quote user="amdismal"]The crossovers were fourth order, which is what I use on my horns.  Second order, I have found, can give a better blending, but reduced the delicacy and transparency in my system.  But it's very complicated, and further exacerb...

Read the Post in new Window Read the Post in Threaded view  Post #147: I think I got it. by Romy the Cat on 2021-12-20 
Browse the content of the threads in new Window  Thread: Remedies the Beauty in Playback Listening  293 Replies 
Ah, I think I have found the secrets that I was looking for. I still do not work with 15-in woofer but still try to make my red driver sound the way how I want and I got some revelation  and the result that is very close where I would like to be. The...

Read the Post in new Window Read the Post in Threaded view  Post #3: It's nice to dream about full range capability... but the ultra-super ... by Gregm on 2006-04-28 
Browse the content of the threads in new Window  Thread: How to give bats a headache. in Playback Listening  5 Replies 
Two basic premises:A) The concept we all operate on is: a chain of components connected between one another that pick up info from a medium, transform the info into ac and amplify that info; then, we attach speakers to the last of thes...

Read the Post in new Window Read the Post in Threaded view  Post #106: Line-level passive vs. active ULF filter by Romy the Cat on 2011-05-06 
Browse the content of the threads in new Window  Thread: Macondo’s lowest channel. in Horn-Loaded Speakers  150 Replies 
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...

Read the Post in new Window Read the Post in Threaded view  Post #54: The tranning of SA8535…. by Romy the Cat on 2006-11-06 
Browse the content of the threads in new Window  Thread: Tweeter for Vitavox S2. High-sensitively ribbons? in Horn-Loaded Speakers  64 Replies 
[quote user="cv"]How are you crossing over the SA tweeter?[/quote] Currently I cross them with second order at 12K, near Bessel Q, but not exactly. I did not play with crossover trying to tube it more precisely. It turn out the my driver was too “fr...

Read the Post in new Window Read the Post in Threaded view  Post #57: Playing with RAAL 70-20RX by Romy the Cat on 2008-10-14 
Browse the content of the threads in new Window  Thread: Macondo’s MiniMe or about Pilot Acoustic Systems in Audio Discussions  213 Replies 
In inversing tweeter, spent some time listing it. It has at 93dB 6.8R and .63mH. The inductance  is too high for my application, so I would need to shunt primary with one more coil to drive inductance   down. I recognize only Bessel cu...

Read the Post in new Window Read the Post in Threaded view  Post #36: Back to the drawing board, the question is what is next? by Romy the Cat on 2018-09-23 
Browse the content of the threads in new Window  Thread: The ULF cannel for my new listening room. in Audio Discussions  43 Replies 
Yesterday I spent most of the day to play with my IB, trying to make it to sound the way how I like.  I pretty much wanted to re-implement on analog level that surprisingly good result I got with digital crossover. So, I have built my along crosso...

Read the Post in new Window Read the Post in Threaded view  Post #1656: Worthwhile? by rowuk on 2018-11-24 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
Maybe you should get spectral data what your power supply secondaries look like in an case, my suspicion is that we have the exact same issues as with high order crossover networks when our power supplies have "high order" filtration. Maybe we ne...

Read the Post in new Window Read the Post in Threaded view  Post #51: I do not know for now… by Romy the Cat on 2007-05-02 
Browse the content of the threads in new Window  Thread: The one-stage Melquiades. in Melquiades Amplifier  74 Replies 
[quote user="op.9"]I chanced upon an interesting PSU arrangement for my 5842. I run a valve regulated powersupply at 210v and then drop down to 160v with an un-bypassed 8uf oilcap. Any more capacitance or bypasses seemed to be a step backwards in ter...

Read the Post in new Window Read the Post in Threaded view  Post #52: Super Milq 6 channels diaries: I am through by Romy the Cat on 2007-11-01 
Browse the content of the threads in new Window  Thread: 6 Channel Version of Super Melquiades in Melquiades Amplifier  131 Replies 
Ok, now it is done and it is official as I see nothing available for conceptual improvement in the crossover circuit. Interestingly this version offers the most interesting sound as well, since the circus was tune for sound, not vise-versa, it is wha...

Read the Post in new Window Read the Post in Threaded view  Post #39: Have you tried... by anthony on 2018-09-25 
Browse the content of the threads in new Window  Thread: The ULF cannel for my new listening room. in Audio Discussions  43 Replies 
[quote user="Romy the Cat"]  The biggest mystery for me and it is what I am thinking about all time is what digital filter does to my sound that analog could not. Is it a precision of the Bessel curve? I hope it is not. I hope it is something tha...

Read the Post in new Window Read the Post in Threaded view  Post #44: Do not be nervous, listen the thing. by Romy the Cat on 2007-06-22 
Browse the content of the threads in new Window  Thread: It’s mad, mad, mad... electricity. in Audio Discussions  1910 Replies 
[quote user="Paul S"]I suppose you'll also be the first person who ever returned one...The D pulses make me nervous.[/quote]Hmmmm, it would be disappointing if I will be forced eventually to return it as it would make me to look further for some simi...

Read the Post in new Window Read the Post in Threaded view  Post #405: Semantics and other stories by rickmcinnis on 2010-11-09 
Browse the content of the threads in new Window  Thread: Macondo’s Midbass Project – the grown up time. in Horn-Loaded Speakers  455 Replies 
Romy,I know you know there is no such thing as perfection.My favorite quote is from S. Dali who warned, "never fear perfection, you won't achieve it".  But in that statement are, at least, two messages.Nothing wrong in striving for perfection.  Being...

Read the Post in new Window Read the Post in Threaded view  Post #4: In my view Mass matters. by Romy the Cat on 2010-07-21 
Browse the content of the threads in new Window  Thread: Idler Drive - Rumbling Into The Future? in Analog Playback  27 Replies 
[quote user="N-set"] Romy, would you elaborate on that more? Looking at his formulas it looks like higher mass gives lower resonance point, which is I guess desireable?[/quote] Yes, the resonance point go lover but also the ratio of contributi...

Read the Post in new Window Read the Post in Threaded view  Post #75: New options for Fundamentals channels. by Romy the Cat on 2009-06-10 
Browse the content of the threads in new Window  Thread: Adding one more spherical to Macondo. in Horn-Loaded Speakers  92 Replies 
[quote user="Romy the Cat"] Yes. I’m exiting to see how the new horn I shaping up. Still I do not think that it is about second orders.  Obviously in context of 5 channels system, the more channels one gets then less room between them. I still feel...

Read the Post in new Window Read the Post in Threaded view  Post #4: The miserable line-arrays with 25W8565 by Romy the Cat on 2006-06-18 
Browse the content of the threads in new Window  Thread: Macondo Alternation. Extending the LF line-array in Horn-Loaded Speakers  8 Replies 
Ronnie, Arranging the driver in a line array is a fierily straight forward thing. Also be advised that the arrays will less likely work across a short wall, and you need to use a long wall. Generally it is imposable to advise anything as any rooms a...

Read the Post in new Window Read the Post in Threaded view  Post #1: Some thoughts about Milq’s MF filter by Romy the Cat on 2009-05-02 
Browse the content of the threads in new Window  Thread: Some thoughts about Milq’s MF filter in Melquiades Amplifier  2 Replies 
I have no doubts that it will work but I would like to understand HOW it works. The objective it to have first order filter, of cause not the filter where capacitance do high-pass roll off but RL. In RL filter there is not reactive elements i...
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