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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="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="drdna"]
I chose this for a sound most free from "graininess" which may change with PP2000. However, what is the rationale to change the impedence loading on the tube, from your perspective? As you know the Magnequest OPT has taps for 4,...
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Floobydust,
excellent points as usually. I am not too concerned about the AC noise on my filament, at least at this point. I want to get the right “check and balance” operation of the whole amp (all channels together) and then will see how the...
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[quote user="Kcct82"] Hey guys, I bought the Goto 505TT with S150 horn brand new over 2 years ago. Guess what? I'd still be in sonic shit if I followed the 200-1000hz "recommendation". The 505TT does not perform well below 400hz and when I final...
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A few days back a Goto SG-555PS driver pop up for sale in Australia. My idea to try this Goto is because it has diaphragm in front and it would be easy for time-aliment. I was considering getting it but the price was too high for my need. If I kn...
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Regarding combined driver diaphragm area for ULF: Romy wrote: "...I disagree that using a bunch of 10" drivers is some kind of compromised in way. The six 10” drivers give me a surface of 2.3 18” drivers..." I recognize the relative and impo...
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[quote user="haralanov"] You may not believe me, but the driver start to roll off (very smoothly) after 14kHz and at 20kHz is at -6dB. I intentionally do not use it so high, because I have ultra light weight alnico paper tweeter: http://www.bgau...
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Let me tell you a bit about how an why we designed the midbass horns the way we did.A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn sound.The improvemen...
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Well, since this thread is about the BMS drivers then what can I say? When I tried the BMS driver I felt that their “absolute tone” ability was at the level of demands of school auditoriums. Read more about “absolute tone” at:
http://www.goods...
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Paul
The entire pattern shrinks and grows geometrically, based upon the physical length of the edge of diaphragm involved. Please understand, this is not just a theoretical idea, I do and have done this process on many different types and sizes of d...
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Jessie,
Perhaps if you search something in the throat jungle you might fish some interesting results. You see, optimizing the driver to throat transition you might get some HF out of upper bass driver. But besides getting more HF there is something ...
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I do not know how my S2 driver will sound but I defiantly know that it will have the problem with temperature. Looking prematurely at the driver’s sound it looks like it produce the necessary magnetic force at 2A-2.3A, that heats a lot of this driver...
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[quote user="guy sergeant"]I feel you may be doing John Attwood a disservice here. There are two reviews of this book. The first one which you quote extensively from appears to have been written by Lynn Olson. The second, much shorter review is ...
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A few years ago playing with my favorite Vitavox S2 driver I was asking myself how it might sound if instead of the Alnico magnet the electromagnets would be used. As many other driver of the period the Vitavox did not utilized the only one magnet ty...
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[quote user="cv"] I couldn't unscrew the top threaded piece myself. Perhaps I was turning it the wrong way?! Any guidance you could give on dismantling the driver would be appreciated.[/quote]Chris,
To take the outer ring is very simple. Uncre...
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LOW FREQUENCY DIRECT RADIATOR DRIVERS
411A –18Hz, 93dB, sealed box414A - 99dB, 30Hz, Alnico, cloth416B – Alnico, 97dB, 25Hz, cloth416C – 16” version of above with Ferrite416Z - 12" version417C – 100dB, 69Hz, Alnico, 1.3T, 12”418B – 100dB, 55Hz, Alni...
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Hi all
I have experimented a bit with rear tubes on compression drivers.
Chucked the back covers in a lathe and made a suitable hole
for the rear tube, matching the area behind the diaphragm.
Got "better" results to my ears with wool filled tub...
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I recently made some highly attractive changes with the way in which I use S2. Now, since the S2’ top got cleaned up the universal misery of universe bothers me tremendously. :-)
Really, the S2 runs in my 400Hz horn up to 12.5kHz and the S2’s 12.5kH...
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[quote user="cv"] The acoustic transformation's probably done by the time the wave reaches the throat. [/quote]
Yes, it is. If we loom how the S2 internal channel done then it would clearly indicate the it should not be a great tweeter but wha...
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[quote user="miab"] I'm curious as to why the preference to paper cones as opposed to carbon/poly/kevlar/ceramic/.... With weight and stiffness advantages of other materials, would advancing technology not be well implemented towards drivers? [...
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Oliver,
It might be anything including electricity. Generally compression drivers are very much vulnerable to the electricity problems, muck more than convectional drivers. Let pretend that distortions in powers lines are responsible for worsening o...
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I pack up the new amp today and plug it in with my right Macondo channel. The electricity was not bad I was VERY surprised with the fact that the new amp sounded MUCH more advanced then I anticipated from a chance of MF channels power supplies. The l...
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Hm, very different and very opposite result, interesting. Are you using the same S2 diaphragm as I do – the metal suspension? If yes then it would be the only one explanation that I might come up with.
Sometime the compression drivers with horn form...
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[quote user="Stitch"] Well, I didn't come so close to answer your question right.I saw a few from the German DIY scenery and for them it was like the return of Jesus, best sound on Planet But probably they are still deaf as usual, because the Fre...
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Hi Scooter![quote user="scooter"]
I have tried the SR-009, SR-007, SR-507, and SR-407 many times over a total of some 5 hours with a variety of sources but always with some Stax branded amplifier. Every time I thought / suspected that the big Stax...
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I have no idea what it is but it is something… Take a look:
http://cybwiz.blogspot.com/2011/09/aries-cerat-contendo-reference.html
It is 3 way horn loaded with external LF section, so far so good. Atop then have RAAL ribbon that ...
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[quote user="ulf"]Let me tell you a bit about how an why we designed the midbass horns the way we did.A few years ago we discovered the tractrix horn for MF use. It was really the most important improvement so far. No more honking exponential horn so...
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[quote user="pure sound"].... the most interesting aspect to me is reading about how he makes the appraisals he does ie assessing equipment by the impact that well understood, "content loaded" classical music can/should have on the listener. Whil...
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jd, I cannot see any of PDF files, probably my current networks kills them.
I do not know the AK150 drivers. I know AK157, AK151 and K15/40. If they have significantly lower free-air resonance, at 30-35Hz then I am not sure that they would be ...
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Romy wrote:"...jd, I cannot see any of PDF files, probably my current networks kills them...""...The biggest thing that I wonder is how Mick made the Vitavox bass drivers to has 35Hz resonance. You can always use softer suspension and it will drive r...
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