Lynn Olsonilta tuli vastaan maininta HEIL amt diskanteista tässä ketjussa:
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https://www.diyaudio.com/community/...ng-treble-but-without-sibilance.190663/page-6"
"I find it interesting that the Lansing Iconic used a 800 Hz 2nd-order crossover between the HF system and the 15" paper-cone woofer. That was in 1936, and it's still an appropriate crossover point for a 15" woofer today - woofer tech has not really changed all that much. Well-chosen drivers in the 5~7" range can make it to 3~5 kHz, but not much above that. Whizzer cones buy more extension at the cost of a very rough mechanical crossover and nearly total breakup in the working range of the whizzer cone. (The Altec Biflex was a better solution for a mechanical crossover.)
Work with drivers as they are, not fantasy drivers made with imaginary diaphragm materials. Yes, diamond cone drivers would be nice, or drivers made with synthetic spider silk or buckytubes. All great materials for the Skyhook to outer space, once we get costs down and can manufacture it by the ton. But for now, we have paper, various plastics, and a variety of composites - although paper itself is a composite. Aluminum and magnesium cones are rigid in their working range, but have almost no self-damping, so they store a lot of energy in the breakup region.
So if you are using a 1" direct-radiator dome tweeter, and you care about sound quality more than polar patterns, use a crossover no lower than 2.5 kHz, with 3 kHz or higher a better choice. There are a handful of 1.4" or 1.5" dome tweeters, and these are good down to 1.6~2 kHz, but you have to accept gentle rolloffs above 15 kHz and increased HF directivity. The full-size Heil/AMT's are good down to 1.6~2 kHz, and have pretty good power-handling in the upper midrange region. Not cheap though. Real aluminum-foil ribbons (not stretched film), 4 kHz on up.
If you're using a horn with a mouth size as big as a 15" driver, or preferably bigger, than you can cross at 1 kHz or lower. In short, the appropriate choice of a crossover frequency is set by boring considerations of midbass cone size (which sets the frequency of the first breakup), and the power-handling/excursion limits of the HF driver. Steer a path between these two boundaries in order for the drivers to sound their best."
-Päätin vain vinkata jos mietit jakotaajuutta, 1.6~2 kHz tuntuu olevan Lynnin mielestä ok jos hakee mahdollisimman pientä sibilanssia. Muutenkin hyvä ketju aiheesta, ajattelin kokeilla noita oppeja omassa 2-tie protossani seuraavaksi..
Täytyy myös muistaa, että tekoälyn "mielipiteet" eivät ole ehdoton totuus asiasta. Tulee mieleen, että ehkä "tyyppi" ei tiedä mitään koko asiasta.
