The ess heil amt air motion transformer uses revolutionary, and unique, technology that remains unsurpassed and is stateofthe art. Ess amt1 air motion transformer great heil, selected. A very unique feature of these speakers are the air motion transformers amt mounted on the top of the cabinet. I thought they sounded great and they would absolutely rock. How sound vintage ess 1a speakers heil air motion transformer loudspeaker system usa duration. This is a special type of transducer, similar in some respects to a planar speaker magnepan, others but with a twist or a fold. This tower loudspeaker shares the same footprint and nearly identical cabinet design as the amt monitor and the everpopular amt3 rock monitor towers. Our original is a copy, with some blurred cut off text in the parts list along the right margin. The ess amt1 was very sad when compared to the infinity speakers and the 2000as were not exactly perfect speakers. Theres also another possibility as to the identity of your speakers. I ordered a new set of passive radiators for my ess heil amt1a speakers on nov 6. Foam rotted away by the early 90 s so i tossed them. August 2012 ess heil factory tour we get an exciting inside look at heils driver designs. The woofers appear original and i did not see any damage.
I have used the ess amt 1b, ess rock monitor, and ess amt monitors since 1979. Ess amt factory heil speaker ribbon diaphragm 6891109 2 in stock. If you have the fortune to stumble across any of the ess speakers with heil amt, buy them. Ess genuine factory heil amt ii speaker ribbon diaphragm, 1. The heil amt is an extremely heavy driver therefore we encourage you to purchase it directly from ess heil these are remarkable speakers trio15 with heil amt1, especially for the price. This auction is for one ess heil amt 1c amt1c speaker crossover.
Ess connoisseur series amt 450 loudspeaker the absolute. They are a little larger than the 1ds but i am guessing the sound would be pretty close. We sold a lot of the ess amt1s right from the start and i acquired a pair of the heil amt tweeters along with a couple of epi 8 woofers from the 100s original butyl rubber. Ess factory heil air motion transformer amt tweeter, amtheil 3. Vintage ess amt10b studio monitor speakers heil tweeters 10 woofer 24x14x14 this is the dual plate heil tweeter. If you make your own speakers, buy these great airmotion transformer components. The heil is the most revolutionary loudspeaker development of the past halfcentury, recognized throughout the world for its clarity and stunningly realistic sound reproduction. Ess amt 1a heil air motion vintage speakers made in usa duration.
Welcome to the highend party ess 422h, at affordable pricing. A culmination of ten prototype designs, the ess amt 1 woofer achieves both powerful, impactful, low. The ribbons have a bigger radiating area and throw up a creepily real dipole soundfield that the amt1 doesnt quite have. Ess speaker amt heil ribbon replacement diaphragm amt1a. And phaselinear speakers of decades ago tended to lack ultimate clarity and resolution, however outstanding their basic engineering. The original air motion transformer amt, designed by the noted german physicist dr. It is between the great heil and the small one in size. The 10b bookshelf was manufactured around 19741975 on.
Their honest timbre, excellent speed at mid and high frequencies, and. The speakers were the infinity 2000a hybrid electrostatic speakers. Article by jeff poth my most loyal readers will know that i have a place in my heart and my living room for the heil air motion transformer, specifically the big dog amt1. These two crossovers were pulled from a pair of ess amt 1c speakers the ones that use that famous heil tweeter. Its a folded ribbon design utilizing mylar very lightweight bonded to conductive aluminum strips encased in a magnetic enclosure. So i found this classic ess amt 10b speaker at a thrift store today. Ess speaker amt heil ribbon replacement diaphragm amt1a, 1b, 1c, 1d, 6891107. For many years i owned a pair of the larger ess amt3 rock monitor towers. But actually having bass with planar dipole goodness makes up for it. Ess made a less expensive version of the amt1b called the classic, which was an out and out dog. Original ess amt design, treated paper cone, rubber surround. When i looked them over the wood is beautiful and in great original condition. With one fullrange customdesigned moving coil driver in similarly sized and styled headphones as the heil 422s, these outstanding new 252 conventional cans do not sound conventional.
Unfollow ess amt speakers to stop getting updates on your ebay feed. The key to the system is the design of its patented, doublesided diaphragm and its magnetic components that concentrate the sound unknown in conventional transducers. If you recall liking the amt1 from decades ago you ought to hear the latest from ess, as it is well worth an audition. Founded in 1972 and based in sacramento, ess produced speakers that featured an innovative midtweeter called air motion transformer designed by dr. Amt tweeters are the hf driver to use in any serious loudspeaker and monitor designs. Ess heil amt diaphragms large yellow kapton new pair. So i got it back to the shop, cleaned it up, put the signal to it and viola. If you dont know what the amt driver is, basically it was designed by oscar heil over 40 years ago yes. In the 70s, there was nothing that even came close to them at anything like realworld money.
The only difference being the amt 3s uses 2 10 woofers. Ess laboratories amt10 floorstanding speakers pair. The heil diaphragm, made of soft, quiet mylar to reduce background noice, is bonded with conductive aluminum strips. They are almost as good as the ess amt 3 rock monitors. The ess amt1s give me almost all of the ribbon magic, but with decent bass. The heil is the most revolutionary loudspeaker development of the past halfcentury, recognized throughout the world for its clarity and stunningly realistic. The original great ess heil air motion transformer filter filter amt heil tweeter. It was cool and at the time i suppose it was the besthighest end system id ever heard.
My first speakersess amt 10b with a 10 woofer and a passive radiator in the back. Given a blindfold test, 100% agree the ess amt monitor is simply the best speaker they have ever heard, period. Ess speakers usa the original great ess heil air motion. Ess heil amt 1c amt1c speaker crossover 2 available. Ess heil factory tour we get an exciting inside look at. The ess heil air motion transformer amt tweeter uses a folded pleated mylar diaphragm of a mere 0. Ess factory replacement woofer, ess amt 10, speaker part. Its voice coil is a serpentine pattern of precisionetched aluminum, selected for minimal weight and high power handling. Look in the yellow pages of your city to find more. Unlike the 1a, the 3 had dual 10 woofers and a 5 midbass driver in its own sealed enclosure, topped by the heil amt driver, so it was a 3way. Ess laboratoriesis passionate about making sure you experience sound as clear as light. Sort sort featured alphabetically, az alphabetically, za price, low to high price, high to low date, new to old date, old to new. The ribbon tweeter sounds great, the woofer surrounds are still ok.
The world premier ess 422h heil amt headphones prove that quite well. Ess high quality service manuals user owner instruction. As a result of an expanding home theater market and greater demand for cutting edge speaker systems, ess has experienced a resurgence of interest in its amt midrange. My memory is a bit foggy but i seem to remember the problem with the amt driver was the relatively high moving mass due to the multiple folds of the tweeter. In 1972ish, i heard a demo of a quadrophonic system, where the front speakers were ess heil amt 1as. Vintage audiophile ess amt 1 speakers sound excellent. In spite of the new technology of everything getting smaller,the amt 4s still sound great. My dad remembers ess being the sh in the 70s with the 1bcds and monitors and the great heil ribbon tweeter. They are not the most accurate speakers out there but they throw a huge soundstage and preduce a very full and big. This speaker operates on a different principle than conventional speakers in that it squeezes the air out rather than pushing and pulling the air as cone and electrostatic speakers do. The most modestly priced system in esss superb amt series, the 10b incorporates the incomparable heil airmotion transformer as its midrangetweeter. I just hooked them up and they sound good even tho they need some minor attention.
The only currentday speakers that can even compare to the ess amt monitor is the flagship model produced by martinlogan summit model, with the additional support from an outboard powered subwoofer. Ess amt 10 inch replacement woofer, 6891012, factory ess amt woofer speaker. Cant say that i have any useful memory of what it really sounded like, i just knew it was way better than my rca. The amt 1 combines the original ess heil airmotion transformer with a specially developed teninch woofer that has an oversize, deepdrawn frame and high gauss magnet assembly for long, linear excursion at the highest possible acceleration. It is the equivalent in surface area to a conventional cone type eight inch band for better point source dispersion. He says that anyone who walked into a high end speaker store in the 70s and listened to all the speakers, fell in love with and walked out with a pair of esss.
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