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TOPIC: 3-way loudspeaker system with Heil AMT tweeter

3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20149

  • JdM12
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After a previous build based on vertically stacked planar magnetic speakers, I decided to make a more or less conventional three-way loudspeaker system, keeping the dipole radiation for the highs only.
If you're interested, please follow this link:
homeweb.unifr.ch/Matathia/Pub/Audio
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3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20156

  • john.reekie
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Nice build :)
I am not miniDSP support.

"You must ask the right questions." - Dr. Alfred Lanning's hologram.
-> Have you read the User Manual??
-> Have you drawn and posted a diagram?
-> Have you posted a screenshot?
-> Have you posted your config file?
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3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20191

  • Thunderstruck
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Very nice work. I'm inspired. I bet you love the AMT.
Last Edit: 5 years 2 months ago by Thunderstruck.
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3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20244

  • devteam
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Beautiful setup indeed! Thanks so much for sharing and documenting your work and measurements as well.
Commercial project or just for fun?

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3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20252

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Thanks for your positive comments. Just for fun :)
I made my first big loudspeaker with a Peerless kit in the seventies. Since then, I bought commercial products from AR, BW and Meridian. I liked the idea of the last one, digital active, it really had big qualities, especially in the bass, but one could not stop from feeling that coherence was not there in the mids and highs.
As digital filtering became affordable, I decided to explore the subwoofer + wide range way: Jordan line arrays, then Magnepan. They are indeed coherent but so week in the third-fourth octaves! I concluded that I really need a midwoofer with a tweeter that can be crossed over low enough.
Midwoofer and AMT tweeter combine really good in terms of dispersion: no big tonality changes wherever you are in the room. The only challenge was to mix them well at the crossover.
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3-way loudspeaker system with Heil AMT tweeter 5 years 2 months ago #20253

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Thank you! Yes, the AMT is a class apart. Some friends of mine, classical violinists, are delighted with its exceptional transparency, saying also that most hi-fi systems sound 'broken' in the highs.
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3-way loudspeaker system with Heil AMT tweeter 4 years 7 months ago #23353

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My new setup uses U-DAC8 and a Windows PC as a FIR audio processor. Instead of a dedicated DSP, the computer does all the filtering, equalization and phase linearization. Please follow this link:
JdM12 Audio Project 2016
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3-way loudspeaker system with Heil AMT tweeter 4 years 7 months ago #23399

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Wow.. Very neat. That's indeed another step up! Glad you're still able to use a miniDSP piece of gear for your setup. :-)

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3-way loudspeaker system with Heil AMT tweeter 4 years 7 months ago #23428

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U-DAC8 performs flawlessly. Just two software requests:
An updated driver would facilitate the installation on the latest versions of Windows.
Direct access to the volume controls (without clicking Control Panel, then Device, then Output Channels) would be nice.
Thank you.
Rob
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3-way loudspeaker system with Heil AMT tweeter 4 years 7 months ago #23443

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@ Rob,

Glad to hear that it's working out well for you. :-)
We do have a new driver for Win10 as beta for those of you who want to try. Simply send a tech support request to minidsp.desk.com and we'll set you up.

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3-way loudspeaker system with Heil AMT tweeter 4 years 6 months ago #24141

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Thanks for the new driver :) I could reduce the buffer sizes (hence latency) a lot.
Rob
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