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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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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...
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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...
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[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...
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[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...
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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...
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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...
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[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...
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[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 ...
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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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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...
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[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...
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[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...
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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...
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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...
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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...
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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...
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[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...
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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...
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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...
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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...
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[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...
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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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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...
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[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...
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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...
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[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...
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[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...
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[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...
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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...
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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 that in order to do it c...
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