Talk:Air Motion Transformer

What is it?

This article needs to start with a sentence that begins, "An Air Motion Transformer is...". Describing how it works is secondary to describing what it is. johnpseudo 22:59, 12 November 2006 (UTC)

Merge proposal

The ESS speakers and the defunct company that made them are in a 1:1 relationship with the AMT. There's not enough material to want it split over two articles. So let's merge this new content to here. Dicklyon (talk) 18:53, 7 March 2008 (UTC)

Mildly disagree. If ESS were the only company ever to have made speakers with AMT drivers, it would be a 1:1 relationship. Since that's not the case, we run the risk of including irrelevant information about a company in an article about a driver. Rivertorch (talk) 18:45, 8 March 2008 (UTC)

I wasn't aware that others had used AMT. Who did? Dicklyon (talk) 19:25, 8 March 2008 (UTC)

According to the article, the AMT is currently being produced and used by others. Rivertorch (talk) 06:13, 9 March 2008 (UTC)

There are quite a number of companies that build loudspeakers based on the AMT principle as menioned in the article itself. Germany: ADAM, ELAC, ETON, EVE Audio, MUNDORF, MBHO; Switzerland: Precide; Spain: BEYMA (rather active on that subject); Japan: FAL - Furuyama Audio Labs. It is also the subject of standard text books, e.g. , 6th ed. on page 102. In my opinion this article has the right to remain. --Robsedropse (talk) 08:58, 25 August 2015 (UTC)

References

Self-promotion

It looks like a couple businesses have tried to make additions to this article to advertise their products. I'm not opposed to mentioning brand names on the page as long as it's neutral, but I just reverted a particularly egregious example that I think was far too advertising (and non-informational) to be part of a Wikipedia article.

That particular example was the only contribution of some IP user. And actually, the entire preceding paragraph also was the only contribution of some other IP user, but I opted not to remove it for now since it reads slightly less like an advertisement and also provides a reference (although it probably still could be tweaked to better conform to NPOV). At least the reference isn't dead after almost three years, which is slightly encouraging.

I placed a watch on this article because it's very infrequently updated aside from these occasional marketing attempts, but is there anything else we can do about this? LoganDark (talk) 12:18, 17 January 2025 (UTC)

Misleading quantification of is characteristucs

The article in a few places tries to assert certain characteristics that either are not necessarily true or are weird quantifications .

For example, comparing the air motion of a 1" amt to an 8"cone makes no sense. By 1" does one mean the width in the bellows fold directions or transverse it or the depth of the involutuions? It's an uninformative comparison. It may may sense only when referring to some manufacturers current offerings that might be labeled by some characteristic single dimension to tell them apart,

second the claim it is only good down to 650hz seems authoritatively stated but is fully wrong. Again this might be where some manufacturers use them but this is contradictory to later in the article speaking of headphone speakers that go to 10hz. The reality is that any size speaker will have its optimal acoustic bandwidth of operation. But the fact that the amt can move a lot of air even at a small front area actually argues well for its use as a woofer. The fact that the ribbon can be lighter and move fast argues for its use as a tweeter too. But obviously physics will limit any given geometry to its best bandwidth. There's nothing special about a 650hz or below that limits it. It just may be hard to find manufacturers that have embraced that range.

its dipole characteristics are not explained at all! All speakers have a back and a front so attributing special restrictions due to that is illogical. What is special is the assmetry of the traverse and longitudinal bellows directions. That could alter its x versus y sound projection. Likewise lacking a dome or cone shape it drives air in a differently shaped phase front. Just as say ribbons and some electrostatic speakers do. But these are not discussed and far more relevant to making proper use of the speaker Cems2 (talk) 12:48, 25 June 2025 (UTC)