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| Romy the Cat's
personal site dedicated to advanced audio and evolved music reproduction
techniques
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Anthony, I agree with your central observation, and I have used paralleled HF drivers for decades, starting with the old Peerless paper tweeters paired with RTR6 electrostatic arrays, and now paper whizzers with Audaphon ribbons. As you know, this ca...
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Of course, any speaker is a compromise rather than a "solution" for the complex problems of "phase", which can hardly be "solved" by fixing driver diaphragms in the same verticle plane, at least relative to the listener. Not to say that this is not w...
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Agree, it sounds interesting, and just the sort of thing I daydream about. My own speaker project has languished for well over a year, due to "health issues" and old age, generally speaking, and all the more frustrating because I am so close now, yet...
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When the passive radiator in question is mentioned, are we sill talking about a particular active 10" Scanspeak driver that is not hooked up to an amp? Again, the PR is always parasitic, more or less fighting with the active driver, except, apparentl...
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For some time it looks to me like "the industry" has been sliding into a sort of Audio Dark Age. However, "the industry" continues to use more or less the same approach to promoting their stuff that they've always used. Certainly, despite the insane ...
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The query is, if to keep this acceptble but LF challenged speaker (Dannoy) as-is, then how to add LF without wrecking what's good about this speaker. Probably worth another listen to Romy's most recent YouTube post on the matter, as he actually, lite...
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Another thing to consider here is a specific reason or reasons to use the "PR Type" Scanspeaks as subs, since Romy says outright that the Dannoy's PR cones have "no ouput", but the (rather amemic) LF from the Dannoy'ed Tannoy is all there is from the...
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Fair Xmax, and that (plus multiple drivers) is pretty much necessary for a 10" driver to go low. The best thing about this LF idea, IMO, is that it increases your chances of blending sonically at X/O. No idea how the cones hold up with the power (inc...
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Well, Tannoy tuned all their 10" monitors to play reasonably well down to about 50 Hz. Their monitors I heard were all variations of ported, with some of their "newer" monitors (70's?) using the ports to create more apparent bass, and those monitors ...
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Jarek, can we just stop talking about the Dannoy "output" at 20 Hz, just because that's Fs? Not saying the Tannoy doesn't benefit sonically from its Dannoy configuration; but, if to add LF, as you say you want to, then you need subs, since the Tannoy...
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Of course, it's the top end of the woofers/subs that has to blend in with the bottom end of the Dannoys, and you can get gain at X/O frequency from the subs, if it sounds OK to do it. I guess that means coming up with an "average" of the sum and diff...
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Likely, whatever you do with subs will include a big coil, and caps and resistors, too, if to make a steep filter to "match" the Dannoy LF "roll off". The sub(s) might be tailored in terms of correct SPL to blend with the Dannoy at the X/O point, and...
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Jarek, how many 10" Scanspeaks do you think it would take to get way down in your room? And remember that, according to Romy, the "best sounding" Dannoy, the heart of this speaker system, still only plays up to 90 db peaks (70 dB continuous with seri...
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Yes, Jarek, I can see that, now that you mention it. Basically, then, it appears it would just eat low end, based on Q vs. other active speaker perameters. So, what would be the "theoretical benefit" of the added passive radiator be in the case you d...
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I understand someone got good sounding results from - apparently - using a certain passive radiator to effectively lower the Fs of a 10" Tannoy Red. Can it be that the Tannoy has a long enough throw that is still damped in line with the rest of it'...
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Thanks for the explication, Robin. This is exactly what I encounted when I messed with passive radiators, many years ago, and it is exactly why I abandoned them fairly quickly, after "making sure" I could not make problems "go away" by "adjusting Fs...
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Jarek, my experience affirms that many “listening rooms”
are overdamped, and you can always put a rug or rugs on the wooden flooring
where you want it/them. And I have been able to get good sound in weird rooms.
Basically, regarding rooms, “to...
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Jarek, don't worry about me spending too much time trying to figure out the Dannoys. For one thing, I've already spent several decades charting vintage and newer "special" drivers and sound. For another, I am already years into my own speaker project...
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No idea how one blends in a random passive radiator, and I gave up on it after a year or two, many years ago. But if you can put your ear to the passive radiator and hear it plays up into the midrange, then you will probably want to use something wit...
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I've had lots of down time for a while now, and I just saw the old IEM (in-ear monitor/earbud) post while mining the site. I already posted that I got a Crane CC2E radio, mostly to listen to nighttime re-broadcasts of the local symphony orchestra. I ...
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The bitch is, it takes so long to work through everything in your own system; but that's basically what it takes. If you go DSET system, like Melq, you may well be years away from getting it all up and running. And even once you are happy with your r...
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Big differences between PS in my giant amps and my DAC, my passive attenuator and my phono stage, TT. PS has to be "good enough" for the application. Maybe "reverse engineered" from the demands end requirements (ie, the mind of the listener). Throw t...
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Rick, good question. Probably few people at this forum think seriously about power supplies; you might get more answers on DIY forum. Of course, the only thing we care about is our experiences with the Music, however that happens, which certainly doe...
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Congratulations, Rick. May your new batteries live strong and long. My storage spaces are crammed with wrong, superceded, and experimental hi-fi gear, including many dead SLA batteries I used in series to power a field coil driver. Gotta round those ...
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I have not shopped to find the smallest thing and the lowest price for it for your use. I can say that some AGMs are dry cell, and some are widely used for mobile sound systems that draw considerably more than 600 W, from a single battery that a stro...
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It's hard to buy batteries based on mfg. info, because they basically just say stuff, and also, as you pointed out, there are many "variables". AGM would work for you, if you got "the right one". Good luck with your LiFePo batteries. I think current/...
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Rick, a 12V battery must put out 50 Amps to make 600 Watts, given 100% efficiency (no system losses). So, the question is, how long can the battery do that, since that's what you're doing with it. It's of no use to have a weak battery that still puts...
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Well, that does not tell what sort of power your inverter wants/draws when you hook it up to your hi-fi, though it seeems like that is what you'd want to know in order to calculate how long you can listen with a given battery.Paul S...
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what does your inverter require from the battery (in terms of both voltage and current) to put out it's own rated AC voltage and current? It seems like one would want to know this and take it into account before purchasing a battery for the inverter,...
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Rick, sure, working volltage is important. What does your inverter require in the way of current in order to produce it's rated voltage at its rated current? I can remember times when I measured "correct" voltage when the battery was functionally use...
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