Will do.
- And see the cut-on frequency of the first axisymmetric higher-order duct mode:
It basically doesn't let the source misbehave, ignoring its HOMs, which are destined to vanish pretty quickly.
That's also why it's able to maintain so nice polars up to 20 kHz.
This is of course the direct consequence of the small throat. Kudos to BMS, this allows a wonderful device to be made.
- And see the cut-on frequency of the first axisymmetric higher-order duct mode:
It basically doesn't let the source misbehave, ignoring its HOMs, which are destined to vanish pretty quickly.
That's also why it's able to maintain so nice polars up to 20 kHz.
This is of course the direct consequence of the small throat. Kudos to BMS, this allows a wonderful device to be made.
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Apologies in advance if the answer to this is already posted but I’ve searched here and on the ATH website without success. If I want to make one of the most recent waveguides, preferably with the throat extension as part of the construction, but I want to devise a lathe-based approach instead of 3D printing, where can I find the parameters to plug into the parametric description? Thanks very much for any guidance someone can offer.
Few
Few
A460 + Lavoce DF10.144LK:
I'm still not happy about the small ridges around 2k though -
These must have an explanation beyond the waveguide shape alone.
I'm still not happy about the small ridges around 2k though -
These must have an explanation beyond the waveguide shape alone.
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Direct comparison of DFM-2535 and DF10.144LK under the same conditions, A460 waveguide:
green = DFM-2535
2nd, 3rd, 4th:
green = DFM-2535
2nd, 3rd, 4th:
Sure. I've tested four versions already, this is probably the final one (green):
This may well be the best of it all. Had I only known this earlier...
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Faital HF1440, the same waveguide, standard 1.4" adapter.
2nd, 3rd, 4th:
@454Casull - I'm actually quite happy with what they do as they do it, no need to intervene 🙂
2nd, 3rd, 4th:
@454Casull - I'm actually quite happy with what they do as they do it, no need to intervene 🙂
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Some progress on the a460 spline version, glued together with Griffon Polymax. Works really well I'd say with plenty of time to adjust but the parts stay together from the start. And fills gaps as well. Needs some more finishing though.
Well, the DF10.144LK doesn't look quite as good at lower frequencies as I had hoped it might be. The peak around 20kHz isn't present in the datasheet curves, but should be fixable with a passive notch.
How do you plan to do the finish? Won't it be a problem with that glue?
Looking closely at the photo, the petals seem a bit far apart, more than I would expect - did you sand the sides before gluing? This is really necessary to do, as there will virtually always be some overruns at the corners, preventing the fit.
I'm very curious to see your measurements, especially how the region around 2 kHz comes out.
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Here kind of matched using Linkwitz Transform and eq biquads. Would be some +7.5dB extra drive voltage on the coil, and then depends on excursion capability, as both drivers have approx. the same Sd, and probably not too different internal geometry.
Attachments
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Softer suspension and higher Mms would presumably lower the Fs of the driver. The DFM-2535 has vented surround. Otherwise there are hole punches down to 1-0.5mm https://www.amazon.de/Huayue-Locheisensatz-Locheisen-Uhrenarmbänder-Kunststoff/dp/B08KW41SSM/ 🙂
To stimulate a joint effort, here is a DXF of the long throat adapter profile for BMS drivers: https://at-horns.eu/ext/S140.zip
It is not necessary to use the entire curve - a small initial fraction can be omitted, depending on the geometry of a particular driver. I looked and it seems that even the 4554/4555 are no longer readily available as they once used to be. The other/newer BMS drivers can surely be used, maybe with even better results, perhaps just without the convenience of a wide exit angle.
It is not necessary to use the entire curve - a small initial fraction can be omitted, depending on the geometry of a particular driver. I looked and it seems that even the 4554/4555 are no longer readily available as they once used to be. The other/newer BMS drivers can surely be used, maybe with even better results, perhaps just without the convenience of a wide exit angle.
DF10.144LK with some of the longer 1" adapters (A520G2) I had at hand:
This is also highly usable, IMHO.
This is also highly usable, IMHO.
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