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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Stuck,
You can NOT stack coils in series to get a “distributed half order crossover”. To make it “distributed” the first and the second first-order filters should be decupled. For instance the first filter might be at line-level and the second at th...
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With the electricity being so bad my listening has been limited, and what I've been hearing has shifted my focus somewhat, which is annoying, to be sure, but it is also educational. I have been playing around with plate loading a little and not...
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[quote user="haralanov"] First of all, I want to note that when somebody lives on the principle of denying everything, he risks to live in his own encapsulated world, build according to his own principles in order to feel comfortable there. [/q...
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Well, I do have 3 channels of DSEP. Dedicated Single Ended Pentode: one channel (bass/mid 30-500 Hz) with a 307A DH pentode feeding two wonderful Fane neodymium Colossus 12" - one from FS to 150 Hz and the second from FS to 500 Hz. OPT with a lot of ...
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Interesting, How much is what your appreciate in the SPU sound derives from the SPU’s high output. When we load out typical 60-65++ dB gain phonostages with high output 2-3mV cartridges then Sound is way more interesting. I would not speculate if th...
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[quote user="Romy the Cat"]Good, I hate to know everything! I just wrote that the poor Murat
with his neurotic audiophile itch is condemned to go brainlessly very soon over
many drivers. A few days pass and the guy have brought to his room an army ...
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[quote user="js"]Could anyone please advise me as to the recommended rear chamber volume for a Le C'leach horn with a throat of 240cm2, mouth of 7089cm2, length of 47cm, cutoff of 160Hz, T of 0.8? I'm thinking of using a Beyma 122Nd which has a sd o...
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[quote user="js"]Thanks for the reply. I'm using a Jabo KH-55 horn for hf/upper mid, so I think I'll have to experiment with different size chambers. Beyma quote the volume displaced by the driver as 5.5 litres, so I'll start by trying a 9 litre (g...
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Hello Romy and others,Ive been away for a long time taking care of my health but i'm back with renewed interest. I am moving to a new house in the future and have plans for a dedicated music room (and an occasional movie) The space is however much sm...
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Collin,I do not know why you guys dive so fast into self-Moronism rebattling – it was absolutely not my thoughts. The escaping from family is one of the “permitted” reasons to built dedicated listening room. What you do: planning ahead is perfectly n...
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I would have to say that loosing Gabo is a far bigger tragedy than damaging any sort of reputation I might have.About making horns I don’t yet see this obsession as a full time career, and if you ask I just as well would not be able to answer what dr...
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Of course i am referring only to the horn part of a 210-type enclosure. Below the horn cutoff, perhaps around 70hz for the 210, the remainder is filled in with a wooly bass-reflex peak, which gives these boxes their characteristic fluffy, indistinct,...
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The quality of microphones is irrelevant and if you use not 1/3 octave sweep but Noise Generators then you need to run time average on your RTA. Time average analyzers is fine but it need some additional experience to interpret the results. I do...
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Today I spent many hours trying to remove large LF transformers from Melquiades belly and replace them with another one that would load my 6C33C a bit harder. I do idle my output tube very hard and my objective was to get to let it go slightly. The ...
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Gentlemen:I've thought about this mid-bass challenge for quite some time. I have tried many approaches.For the sake of my example, let's assume mid-bass to cover from 60-600Hz. That just happens to be the classic "decade". I have to fully agree with ...
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[quote user="guy sergeant"]The Ultimate turntable only needs to provide for one arm. The ultimate arm. Why compromise its performance with various inferior arm designs.[/quote] Well, certainly a single ultimate arm would be a good thing but I still w...
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[quote user="RonyWeissman"]…Have you tried…. [/quote]
[quote user="Romy the Cat"]…. in the field of cartridges dissectomy….[/quote]
[quote user="Paul S"]..And I coulda sworn I'd just cleaned 'em...Paul S[/quote]
I spend so time figure out what is ...
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[quote user="cv"]Little suggestion should all else fail - you could have a rudimentary phase plug machined that would give you the same (or similar) compression ratio as the original but only one annular exit path. This might preserve the driver char...
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Hi there
I can see Romy's face when he's trying to figure out Martin's time alignment strategy;0) I have Martin's 204 Hz horn with Fostex 208 E Sig. These horns are to be big to properly integrate with anything. They are OK with Fostex Lowther drive...
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Mark, here is the the point that I make. You said that no matter which direction I went off of the baseline you couldn't hear much of a difference. Then use other methods (microscope or not) you did found the direction and distance from that baselin...
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It seems like you are saying that so loading the motor somehow makes it more accurate, so it sounds better. Is this the case? I thought the "most accurate" speed control was DD with a servo (that only "corrects" errors after the fact), as "measured...
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Ok, I blamed the tweeters and MF drivers now the turn of the MF horns. The Mid Frequency Horns (I’ll them “MFH” from now and on) are the stinky like pieces of horn installations, and if they are not done correct then they screw up anything big time T...
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Oh, yes this is the whole idea of Remedies, it is not only a Red combination but it is an assembly with midbass channel which would make it a conventional box loudspeaker. You see, with all interesting things about Tannoy Red the woofer part of t...
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[quote user="Romy the Cat"]The appendix in the corner of my room (I think it called rotunda) is very cool thing – it is where all my equipment lives – superbly comfortable and I can’t dream for better layout of my listening room. I am not kidding. Ho...
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[quote user="genesis168"]I am a owner of an ET SU-1 and would like to know what phono stage would go best with it. Would a Lamm LP2 be a good match?Will be using a Dynavector XV1s with it. Thanks in advance[/quote]It is truly an interesting question....
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[quote user="Romy the Cat"]The whole point in a compression driver is that anything in back chamber is irrelevant. [/quote]Hahhaha, good joke! :-)[quote user="Romy the Cat"]Haralanov, all that you need to do is to make your own experiments, the pract...
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[quote user="Merlin"]My SET doesn't have an output transformer. Just four tubes direct coupled. Bandwidth at full power is 2hz to 35khz.[/quote] Well, your SET might be able to bypass fundamentals from 2hz to 35khz but unfortunately it is all the OTL...
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Hi Cat. I run the 12AX7s just a hair over 1mA each, and the 12AU7s at 6mA. With differential pairs and bleeders, it ends up at 39mA on each +/-300V rail. That works out to 7H minimum inductance at 60Hz, using the standard formula.&n...
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Novygera,If you are really going to run a single-ended pentode as a pentode (not triode-strapping the screen grid) then you will almost certainly need to use some negative feedback, whether global or local. It is partly needed to reduce distortion, ...
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[quote user="RonyWeissman"]Strange but I have found that my reception is significantly better if I don't use any connector between my antenna cable(radio shack RG whatever going up to rooftoop antenna) and my tuner but instead just strip off a bit of...
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