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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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BOX STUFFING"It is very light and has hair from one side." and "glue the box with 3-5cm of high-density foam".- Do you use both a high-density foam and the light and hairy material on top of that, or are they the same?- Do you mean to glue on 3-5cm t...
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Gregm,
perhaps it is might be my incompetence in SS but I do not see a whole a lot of ability to “tune channels” with SS. Sure it is passable to plays with crossover and volumes but it is possible to do at speaker level as well. With SE...
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[quote user="Lbjefferies7"] Very good. Raal 70-20XR...interesting. [/quote]
Oh, yes, the 70-20XR is very interesting. I did not have this driver but Alex allowed me to experimented with some elements of it’s design in context on my “Wa...
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If you are going to build such a huge cabinet or put a hole in the floor to use the basement as a chamber, why not just build horns in the basement with a straight 8-10 foot section in the basement with the back chamber resting on the floor, cut...
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Hi all,In my experience it is VERY hard to get anything resembling realistic bass from a vented box, particularly with a Q of around 0.9 or 1. There is too much stored energy in the system and too much overhang. The best bass I have heard...
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Dominic - At the moment I'm using ..
highs - BMS 4540nd - 1500hz lecleach roundhorn. crossover 1st order HP @ 30khz and 3khz
5842 choke loaded (reg psu) RC coupled into 6N15N (EL84) with a custom sowter mumetal >1000hz xformer
midr...
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Quotes from Romy in blue: "...Anyhow, I do not know at which stage your project is what I think you are somewhere in a process of integrating the drivers..."I would like to stabilize the system, and listen to the existing horns, while ...
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[quote user="ayebee"] The horns that Stereo Lab make are very good, especially considering the relatively modest prices. I bought the "Ultra-Fi" version of the 140Hz horns and they are of course not completely free of resonance ….Present system consi...
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I spend quite a few hours playing with the new channel trying to ingrate into Macondo but so far not successful.
Since the new channel and the Macondo upperbass horn have identical sensitively and identical impedance I figured that I would drive it...
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Romy,I might have overlooked something on your site but I understand that your ULF amp is driven directly by the preamp line stage. If that is the case, you may want to consider an old technique for integrating subwoofers and drive your ULF amp w...
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[quote user="decoud"] Romy, can you be persuaded to post a sketch of what you think the optimal 2 channel Melquiades circuit would look like? [/quote]
Decoud, I do not think that there is such a thing as optimal DSET. The entire concept of DSET is a...
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[QUOTE]But we have all heard
the difference, with standard stereo installations, where the bass
comes from down below and the highs come from up above.[/QUOTE]I suspect that much of this effect arises from the perceptual disjunction caused by using...
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[quote user="cv"] It looks to me from that he might be using an S2 from around 500Hz or 600Hz up [/quote]
Well, I thought about this configuration and it would be hardly possible in the light of what Kevin does. Let pretend that MF is low-pass...
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As I have finished remodeling my new Opera room:
http://www.GoodSoundClub.com/TreeItem.aspx?PostID=16948
…I modified my Altec 19. The one ordinal that I had was truly phenomenal item. I went to recue what was done in there I was very impre...
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[quote user="Marc HENRY"]hi all,thanks for your interest !yes the frame is curved, HF and MF are //yes there is a phase plug in the bass horn. This cover 80-300Hz.there is a separate infra-bass section, covering 20-80Hz.images of the bass phase p...
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I keep thinking about the strangeness of my phase inversion.
I still do not think that it should be this way. My leading explanation is because
I did not implement the crossover precise. If the crossover called for let way
63mH coil and 795uF cap ...
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Similar to the famous sexist tail that women can be only ether pretty or smart the midbass horns unfortunately behave in the very same way: they can be only nicely placed in a room or they can sound good. You want the horn to place in a specific ...
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I was slowly looking for a compression driver that would go in my Fundamental Chanel down to 200Hz. The YL Acoustic 550N attracted my attention. Then I realized that it is the narrow throat type of the drivers, aka WE555, not exactly that I would...
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It is not secret that Stefano Bertoncello loves to appreciate
Goto and is very prolific Goto devotee. Some people love to be groupies of some
cars manufactures, or football teams or political parties. I never associated with any “group identity” a...
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[quote user="anthony"]This configuration should give somewhere around 109dB @ 20Hz from 15w in room with cone movement of about +-3.5mm. That is still low excursion, and they are excellent drivers. [/quote]Well, in this case, I also have to try th...
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There seems to be a lack of useful feedback on the actual sound quality of these oddball, relatively rare TAD mids. So I think it would be helpful to share some basic observations I gather after listening to them for a couple of days. I install these...
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Hi Fellow Forumers,This is my first newbie post :-) Do any of you have any experience with running a Lundahl 1627 in a Full Range Melquiades with Avantgarde Duo Omega speakers?The other options are to get some custom Amorphous OPT's <50R 350mA 8:1...
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Maybe it is because I have very low audio-IQ, but I don’t understand the implementation of your ULF channels - how is it possible to inject +30dB at 25Hz without changing the sound? What is the crossover frequency of that channel? Could you post a ph...
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Raal didn't open doors until after lunch Saturday. Said they were having problems, getting everything working, Lynn Olsen said they were having problems with the room, a bump in the 150~250Hz region and a hardness in the sound between 3 an...
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Robert, what I meant is following: when you will be collecting requirements for you own drivers specification and will evaluate the implementation methods then you need to have you own identity what you are trying to do. I might post a lot of differe...
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Hi Keith,That is an interesting way of setup the S150 horn. Most of GOTO setup that I have seen set the S150 high and point down to listening position. All of them crossover the S150 + SG505TT at 200Hz to 1kHz range. I wish that I h...
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SGSG-37FRP (designed for mid-high ranges in a smaller system). 56,000 yen Driver frequency band: 400Hz - 10kHz, " optimal crossover is 500Hz or more" 110dB, 18,500 gauss
SG-370
(designed for...
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Romy, you have documented elsewhere here that a port can be useful IF you crossover above the port frequency. I have had similar experiences with well damped, high passed transmission lines. Some woofers like room to breath!...
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Got the ultra low DCR toroids coil and pit them in use. Yes, it was very right move and they a bit trimmed the midbass tail. Playing with inductance and listening how the midbass decays (measurements are worthless in this case) I ended up with 4.8mH ...
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Ok, understood. By the way, Dayton Metallized Polypropylene capacitors are fine for this experiment right? I don't have to buy expensive ones just to have a good idea of the passive crossover sound quality? I hope not.-Herman...
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