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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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[quote
user="martinshorn"]So what was next...
They build the DAC, patented the clock... ok.
They build their own preamp. Fully descrete class-a balanced,
john curl wouldnt do it differently. Nice. Low and adjustable gain - very nice.
Constant im...
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[quote user="Romy the Cat"]You have no idea how loaded this question. The crossover point with the MiniMe is not a tactical question but actually the very strategic question of the entire speaker, let me to explain why. The woofers that I use are fai...
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[quote user="Bud"]You need to find an individual who can design series crossovers. Both JBL and Altec used these, because they sounded best. You will need to look for an individual near where you live because they will have to test the drivers as...
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I really do not what is gong on there and why. Thorsten's comment that line-level crossovers do not act like speakers’ level crossover confirms what I feel and what some other people suggested me. Yes, the reactance of the crossover component, the in...
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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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Guys, I am not kidding, something is VERY right in the sound of that tuber crossover combined with my SS amp. Even the ULF in this configuration has some properties that I would like to have improved but the from more holistic perspective the int...
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OK, I have found the problem I had with my digital and
analog crossovers, now everything is consistent. It turn out that my contractor
why built for me the IB manifold confused the polarity of right and left channels.
I was not able to use the pha...
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Hi Romy,Further to my earlier message, I've measured the bias voltages for the driver tubes in all Channels.A -4.3V not adjustableB -13.82V not adjustableC -4.8V not adjustableD -4.2V (ran out of potentiometer travel...may have to adjust a resistor)E...
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I am not sure that I am at final stage of my ULF wondering. I do like the integration-free problem of my ULF via tube crossover. I am a bit concert that I am injecting now + 9dB at sub 20Hz and do not feel that I have too much bass. I am a bit mo...
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To make the story short :) Autotech is a family business located in Lublin, Poland. Younger brothers graduated in mechanical engineering are cars and racing lovers - with scores in Europe as professional drivers and mechanics. One year ago Lukas wrot...
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Romy,Thank you for constructive suggestions, they will be very useful tonight. I am slowly getting the hang of this system tuning and observation approach that you advocate. I do not have separate identical amps (or one multi-channel) for separate sp...
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Hello Martin,Do you know the crossover points of the Vox Olimpian?Thanks!...
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I have been running now a digital crossover at 20Hz, 3th order with some kind of shitty power amp. The digital crossover has a remote control. I would not say that I like the quality of my ULF but I am telling you that True ULF implementation is abso...
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[quote user="Reno"] ok. maybe we have a different understanding of "electronic equalization". We do not use active (i.e. electronic) equalization in the amplification chain. There is of course some equalization in the passive crossover but I real...
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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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My room, is 16 to 17 feet wide, 27 to 28 feet long by 12 to 14 feet high with all walls splayed, with a combination of absorption and diffusion on the walls. All electronics are fed electricity by three pure power units originally recommended by Rom...
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N-set, besides the fact that you are struggling with whatever crossover or any other problem you have I wonder what's your feeling about the difference in a sound this configuration offer? Is I understand you have B2, Reds, default crossover and ...
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KS, I never understood those type of questions. A channel need to be crossed not according to any theoretical justifications but where it would let a given driver in given enclosure to perform it’s best. You need to evaluate what you neighboring chan...
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El Cheapo from Japan. But very complex. With a switch for choosing different crossover points...
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Behringer has a 3 channel digital crossover just like what you want.Don't remember the model, but it's on their site....
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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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*** … unless you are saying that the preamp Zout will possibly change the DSET filter phase somehow? Yep, this is exactly what I am saying. Look the impedance of your preamp is factored in the source impedance of your channel’s filter. The argument...
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[quote user="MINGSU"]As you pointed out, there is no simple answer but manufacture recommendation should be the 1st to try.[/quote] Well, I have no idea why you stress the manufacture recommendations. I do not think it was the subject at all, not to ...
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[quote user="el`Ol"]I wouldn´t talk about "wrong polarity", rather about "dislike of the resulting harmonic spectrum". Wonder how the result would be with phase-correct FIR filters for the RED.[/quote] El`Ol, it is not how I see the sings and I talk ...
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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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Sorry Romy. Which loudspeaker are we talking about? Do you have a picture at all?
As for the Cessaro mod, it didn't sound very different to me - certainly not worth the effort. I'd be interested to know where they crossover to the ET-703. The Alph...
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Hi Romy, I agree with you that most speakers have some tilt-up treble response, maybe not on paper but subjectively so. I think this has to do with "beaming" of the tweeter. In real life sound in general (high frequencies included) becomes weake...
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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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>>Gera, are you catapulted from another planet? Are you sure that you want to drive a mid horn with Rowland amp?
Romy, some people that know me will say "yes", I am not sure... Of course no, not the Rowland to drive my horns, this is the amp ...
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heres a question for the lot of you-due to general lack of many available capacitors in my shop-- i recently mixed both film AND oil caps to pull together a necessary value for a passive crossover. the GOOD of it, is that it takes away some of ...
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