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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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RomanThe main point is that I like the Bass SET aproach with LF capable transformers and have a potent SET to properly drive whole band and take the amp out of equasion in the future when I learn how to build horn speakers. The system I have is an ac...
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This is what you need to know - these are the equations you need for a passive line level filter:http://www.t-linespeakers.org/tech/filters/passiveHLxo.htmlYou also need to obtain the input impedance of the power amps in order to calculate RC values....
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The line level crossovers have some advantaged: they loaded into higher impedance and therefore the values of caps are smaller. Also the line level crossovers loaded against fix impedance, contrary to the speaker level and this allow writing a very e...
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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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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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[quote user="Kcct82"] I know you're not a big fan of digital delay, but I'm using behringer DCX 2496 to make things easier... this way I get to keep all horn mouths on the same plane which avoids some reflections (from other horn mouths). [/quote]
S...
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In the past there was such a concept of full-function preamplifiers that included MM and MC inputs. With time such devises die out and nowadays it is VERY difficult to find a full-function preamplifier generally and a good sounding full-function ...
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This subject of digital crossovers became quite popular during last few years and many audio-people give up and go for a simplicity and painlessness of digital crossovering. There is an army of people out there who would swear by a complete transpare...
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[quote user="Teflon"]If I understand you, your amplifier uses line level frequency selection at the input to each channel, and the output of each channel is optimized for the frequency range of interest -you worry not about the performance of a chann...
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Thanks very much for your prompt, courteous and informative reply!My thought about the crossover design for the EdgarHorn was due to a number of things:1. This particular EdgarHorn is being sold to make way for a Cain & Cain speaker which i...
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Stephano Two good ears has put a post on his site about his new 4 way passive xover.I think this is a better direction than the digital xo. The designer, Thomas, designed also the preamp and I guess he has taken into consideration the input and ...
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I'm working on a project that may be of interest to others, and thought posting to this old thread was a better way than beginning a new post.I use speaker level passive crossovers, between multi-amps (not DSET) and drivers. My desire is to move the...
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It was not so long ago that the Super Milq was a twinkle in Romy's eye,and now it has come to the point he is a strong proponent of DSET (not to be confused with DH-SET). I am always a big believer in the power of topology. I was thinking about...
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[quote user="Romy the Cat"]fiogf49gjkf0dI am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pl...
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[quote user="Romy the Cat"]Even though quantivly and structurally bass is correct but it is not what I am looking. [/quote] Last night I got rid the SMS crossover. I built in the 28Hz, 12dB per octave crossover in the Yamaha B2 amp that I use f...
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I had in my basement Marchand X26 crossover that I use over 10 years back. Since my B-2 power amp with passive filter is being fixed I setup the stock fixed B-2 with external Marchand active crossover. I spent some time to modify the Marchand X26 bi...
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I am observing an interesting and surprising fact – I am begging to like my active Marchand crossover. I did a number of modifications to it and it looks like the parts are broken-in now – it does sound very pleasant for my ULF. I feel it is a bit to...
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[quote user="noviygera"] I think clearing this up this may be of benefit to other users who are building multi-way horns.Let's say I've got two horns mounted on a frame. There's a high horn above and a mid horn below and they are physically time alig...
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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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Well, I never felt that for prototyping I need more then one-channels crossover as by use of the poor sounding prototyping crossovers I never look at the system in it’s entirely but rather for the “technical listing” of just two channels that I...
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I am getting a dedicated third amp to drive my upper bass channel and I just figured out that when I go with my midrange channel at the line level passive filter then I would need 0.0000302uF capacitor against the amp's input stage, that means… 30pF…...
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[quote user="Merlin"]I certainly think you must use an active device for the bass/mid transition in any serious design at this level. Choice of amplifiers will be personal. I don't have the worry of output transormers.
[/quote]Don't I remember yo...
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After much listening and measuring I convinced myself that there is no way for me to escape the use of the 24dB per octave slope if I want to keep the sound of my midbass horn not violated. I also have to admit that I will not be able to render 4th ...
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Hi Markus,
The realisation that in my implementation, going first order on the bass unit is an unacceptable compromise. I have never tried a third order PLL crossover but imagine the losses are noticable.
But I've heard the losses of putting a...
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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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Nope, I do not have the itch with ULF sound but I do have a mild itch with ULF concept. The itch is not strong enough to make me to do something but I would like another day to push the boundary of reality and to see what in behind the rabbit hole. L...
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Hi Jorge, Marc, Adrian, Romy et al,First off, Jorge what's your asking price on the modified DEQX ? Which model is it ? Who did the mods and what are they ? I am very interested.Adrian, as I recall you live in San Francisco. You are sti...
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[quote user="George"] The remote is not a problem. Using a Xantech distributer, repeaters, and electric eye you can configure the two passive remotes in a foolproof, or nearly foolpoof, manner for about $75-100 total. Since I already had the basic Xa...
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Dominic,
I personally do not believe into nether non-powered preamps nor into autoformers volume controls. In my world as soon a any voltage dropper begin to drive any cable it calls trouble. A volume radiating voltage divider or transformer should ...
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Yes, you are right it is rather my negative prejudges and I should not proud about it. It perfectly possible that Bend is a fine performer…. Still, it is a transformer and no mater what you do is a band-pass filter. It is still inductance at the bott...
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