[HN Gopher] Mitsubishi Diatone D-160 (1985)
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Mitsubishi Diatone D-160 (1985)
Author : anigbrowl
Score : 74 points
Date : 2025-12-29 02:08 UTC (2 days ago)
(HTM) web link (audio-database.com)
(TXT) w3m dump (audio-database.com)
| SockThief wrote:
| > It seems that the unit with the unusual size of 160 cm had a
| lot of difficulty in the characteristic test. At the Koriyama
| Test at the Koriyama Factory was carried out in the measurement
| room at first, but it was stopped because fluorescent lamps on
| the ceiling fell due to vibration. It seems that the
| characteristic test was carried out at the ground in the factory
| premises.
|
| > The outdoor test seemed to have a negative impact on the
| neighborhood. At a distance of about 100m from the speaker, it
| was felt as sound, but at a distance of more than that, it was
| transmitted as vibration and earth rumbling instead of audible
| sound. Within a radius of 2 km from the factory, there were
| damages such as vibrations like earthquakes and earth rumbling,
| and sound of walls and windows.
| fancyfredbot wrote:
| Very sceptical that a 3kW speaker can cause "earthquake like
| vibrations with a radius of 2km".
| EvanAnderson wrote:
| I can't help but think it would be fun to try to verify the
| claim, though.
| ssl-3 wrote:
| Fun? Sure. It is indeed fun to play with big speakers.
|
| Direct-radiating bass reproduction is all about displacement,
| and the area of the piston (cone) is certainly a factor of
| that. More tends to be... well, more.
|
| And this mysterious speaker (which there seems to be no color
| photos of, despite the 1981 date) has a radiating area of
| perhaps about 2 square meters.
|
| That's around the same as qty. 18 of 18" woofers.
|
| It's easy to find collections of way, way more than that.
| People even charge money to hear them; they're on the ground
| between the stage and the crowd barrier at any big rock show.
| :)
| kalleboo wrote:
| The japanese version of the article linked in another
| comment has a color photo (which appears to be a magazine
| scan) https://audio-
| heritage.jp/DIATONE/diatonesp/d-160(1).jpg
| qingcharles wrote:
| Marty McFly is volunteering to test it.
| MarkusWandel wrote:
| Resonance! Very minor earthquakes _can_ knock picutures off the
| walls, items off the shelves etc. if they just happen to hit
| the right resonant frequency. So if you flood the area with
| 8Hz-ish acoustic energy, some stuff will start to shake.
| yapyap wrote:
| wowie
| duskwuff wrote:
| "The Hitch Hiker's Guide to the Galaxy notes that Disaster Area,
| a plutonium rock band from the Gagrakacka Mind Zones, are
| generally held to be not only the loudest rock band in the
| Galaxy, but in fact the loudest noise of any kind at all. Regular
| concert goers judge that the best sound balance is usually to be
| heard from within large concrete bunkers some thirty-seven miles
| from the stage, whilst the musicians themselves play their
| instruments by remote control from within a heavily insulated
| spaceship which stays in orbit around the planet - or more
| frequently around a completely different planet. [...] Many
| worlds have now banned their act altogether, sometimes for
| artistic reasons, but most commonly because the band's public
| address system contravenes local strategic arms limitations
| treaties."
|
| ( _The Restaurant at the End of the Universe_ , Douglas Adams)
| thrdbndndn wrote:
| Is the article itself written by the manufacturer or a 3rd party?
| It keeps saying "we ..." but then also "[i]t seems that ...".
|
| Edit: apparently the site is translated from its original
| Japanese version, which explains these weird wordings.
|
| The original article is here, which has more pictures too:
| https://audio-heritage.jp/DIATONE/diatonesp/d-160.html
| buildsjets wrote:
| For many many years I have kept a design file on a subwoofer
| which would be far larger than this. 3kW is jack crap. The
| subwoofer I have in the trunk of my daily driver is almost 1kW.
| I'm thinking more like 95 KVA, or 76kW at an assumed 0.8 power
| factor. 3" cone displacement and 18,000 LbF available to drive
| the cone. Low pass filtered at 2000 hz. I am entertaining all
| offers from our resident billionaires to quit my job at the jet
| building factory to create such a device. We can drag it to
| Burning Man. Our first capex will be this big ol electrodynamic
| shaker head.
|
| https://www.udco.com/products/electrodynamic-shaker-systems/...
| pySSK wrote:
| Gorgeous. Not a billionaire but approximately how much would
| this cost to build?
| WorkerBee28474 wrote:
| ~100K USD
| buildsjets wrote:
| For the labor? Sure.
| nineteen999 wrote:
| Can only imagine the power efficiency of this was horrible.
| JSR_FDED wrote:
| Don't they use something like this on ships to fend off pirates
| who want to board?
| WorkerBee28474 wrote:
| Yes, "LRAD"s.
| ominous_prime wrote:
| The claims sound somewhat exaggerated, 5kw of subwoofer is
| nothing in live music venues, though they purposely don't go as
| low. Here's some more modern "big" subs, which are larger and can
| radiate significantly more power
|
| https://www.aia-cinema.com/products/the64-sub-pro-passive-se...
|
| https://www.aia-cinema.com/products/the100-sub-pro-passive-s...
| readingnews wrote:
| Thanks for the links, that is a company I did not know existed,
| and the woofers are interesting. Really makes you wonder if
| they have overcome the traditional problems of large woofers.
| The Fostex super woofer users recommended rotating it once a
| year due to its own weight possibly deforming the spider
| structure of the woofer, at only 27" across. 60" or 100" across
| is back to the future level ridiculous. As another poster said,
| I can not see this outperforming several smaller units, but I
| would love to see/hear it in action.
| ahoka wrote:
| "Really makes you wonder if they have overcome the
| traditional problems of large woofers."
|
| Having to listen to others bad music, even if I don't want
| to?
| RamRodification wrote:
| Speaking of exaggerations, there is some hilarious marketing
| language on those pages. A couple of examples:
|
| _> It captures both the weight of a collapsing mountain and
| the whisper of tectonic tension with equal ease._
|
| _> THE100 SUB PRO PASSIVE doesn't just play low frequencies --
| it summons them from the earth itself._
| bob1029 wrote:
| 160cm is ridiculous. There is no advantage to this over multiple
| drivers in the same size enclosure. You'll get significantly
| lower distortion with an array of smaller units. The rigidity of
| the speaker cone is a big deal. Smaller ones are easier to make
| stiffer.
| bayindirh wrote:
| This is not built to reproduce sound, but as a vibration and
| sound pressure source as far as I understood it.
| kotaKat wrote:
| https://stat.ameba.jp/user_images/20190605/03/nightwish-dais...
|
| Mounted to the front of a forklift I'd have to say _that 's a
| loud horn!_
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