"@toddalin Best I can tell, my pair came from a pair of AMT1Ds".
Yes, that is correct, originally from the "1D" model series.
Anyone hear or own Musical Technology (Heil AMT's) speakers?
I’m in Venice for work reasons, and looking around for audio to check out.
I came across a place that carries MT (Musical Technology) speakers. They use ESS Heil technology,
From the website:
"MT speakers offer together the qualities which usually can be found only separately in high quality speakers of different technologies: transparency and three-dimensional stage (electrostatics), dynamics and high efficiency (horn systems), Iinearity (dynamic systems).
The main driver is the AMT (Air Motion Transformer) by Oscar HEIL, which for us is the best mid-high in the market. Using a planar diaphragm it has the transparency of the electrostatics, it is a dipole and it’s probably the fastest (15 ms square wave rise time) driver in the world. It overcomes dome tweeters on every aspect: efficiency (100 db), dynamics (50 db of difference), dispersion (1200, front and rear), impedance (it behaves Iike a resistor), mid frequencies reproduction(from 900 Hz), low distortion and power capability (over 1000 W peak power), air driving area (3.5 times). It’s the only one which can reproduce real instruments dynamics and attacks, with its “instant acceleration”. It’s not easy to match traditional drivers to a so advanced component Fast, efficient and powerful woofers, using polypropylene cones, massive magnets and copper voice coils, bonded with high temperature epoxy to precision aluminium form, have been developed to give warmth to the mid-bass and at the same time to follow accurately the violent dynamics of the AMT.
Optimal blending of the drivers is achieved by sophisticated crossover networks which utilize high voltage, high quality capacitors, precision air core inductors and heavy duty wire-wound level control. The slopes between the AMT and the woofers are soft to obtain a very good phase and dynamic response without energy holes in the crossover points.
Speaker cabinets are weIl engineered components where care has also been taken with appearance. They are strategically braced and reinforced for structural rigidity in order to minimize cabinet-induced resonance. Their baffle boards are rounded to avoid holes in the frequency response out of axis. They are constructed from mdf and solid wood board and veneered with the highest furniture grade walnut or lacquered.
The result of all this work and of exhausting listening sessions is “a speaker of incredible performances. The successful matching of the classic qualities of a home speaker, there is a flat response, transparency and musicality, and the dynamic qualities of the best professional monitors makes them very special speakers” (AMT330: Audio Review Oct. 91).They can achieve awesome undistorted sound levels, or can be driven by small power class A or tube amplifiers in a small room. Detail and clarity, wide dispersion and consequently an overall spaciousness to rival the live concert, the infinite dynamics, the coherence of the instruments and of the stage at any volume and in any Iistening point in the room, puts them among the few realistic speakers in the world."
Anyone have these? Or have heard them? I’m curious.
https://audiophile.it/speakers/mt-speakers-h-series/?lang=en
- ...
- 13 posts total
@toddalin fyi, they've been sold out of the full kits with Great Heil AMT and mounting kits for a while. Just for grins emailed them this morning to see when there might be more in stock. I may order a 3rd set of spare diaphragms too just to have them. If the crossover is set up properly, the last longer. I have not been onsite for a while, last time was 4 years ago. Will check in again with them soon. Seem to be back to minimal parts supply and seeing some 1Ds pop up again, which seem to be on limited production again lately, if at all. ------ Btw, some of the early original AMT-1 series line was cross down as low as 800hz, then later bumped up to 1000hz on the later generation models. I had the AMT Monitors and the AMT 1C series back then both. Decades later, when I built my custom DEC-AMT28s, I chose dual 8" Nomex woofers in MTM configuration (Heil in between), and its crossed over at 1,200hz instead at my choosing, also helps to save the diaphragms a bit longer. |
I cross them over ~3kHz and run the speakers as "2.5-ways." Audyns are Q4s, 400 volts ClarityCaps are filmcaps, 630 volts Resistors are Dale, 1%. Chokes are air core, 14 gauge. Lpads are typically run "flat out"
BTW, these can "rock" with the best of them at any sane/insane volume level. Ever wonder what an overdriven Hammond sounds like played through a Marshall at live/concert levels in your living room? Not a great recording, but great PR&T! As always, the recording was made in the approximate sweet spot and is played on an Oppo95 through a Yamaha RX-Z9 RECEIVER in "Pure Direct" mode with no eq or room correction, electronic or physical.
|
- 13 posts total