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[Projet ADS / TeXtreme] Enceintes Satori MW16TX / Great Heil ESS AMT 3


Addicted to Fun and Learning
May 2, 2020
Hi amigos,

Would like to share some pictures and spec of my brand new Satori Textreme / Great Heil AMT 3 diy project.
In this adventure, I remained on an eco-responsible perspective by working in particular with my favorite local carpenter Anthony who was in charge of the selection of the wood (see below). I designed these 2.5-way floor speakers with a “Graham Audio” philosophy, which usually mounts its loudspeakers behind the front panels. I kept the frames from my previous project, still based on a 1st order Xover 6DB/octave and the SMD crossover developed by MHP which drives the Heil ESS transducers in their latest version. Here we find the same gain compensation setting, which can be adapted to a lot of amps.

I opted for the latest Satori MW16TX woofers in 8R, which use very fast TeXtreme membranes. For information, the Satori MW16TX equip the “Rockport technologies Atria II” whose prices are close to 32K€...

I decided to move towards these woofers TeXtreme because SB Acoustics corrected a small accident encountered in the MW16M (Egyptian Papyrus), especially around 1200HZ. The MW16TXs have a cleaner overall response up to around 2000HZ (see below). As a reminder, I cut here @ 1680HZ )

On the spec and carpentry side, I conceptualized everything in 3D before the production:

- 100% handcraft "Ambarroise" made in France cabinetmaking, based on alternating paneling in real Oak + Beech wood, : 20mm raw wooden plank treated with Danish oil.
- Bi-amp crossover. 1st order, 6DB/Octave for Woofers
- Dedicated SMD crossover developed by MHP with gain compensation for Heil ESS (0DB / -1.5DB / -2.5DB / -4DB)
- Jantzen and Monacor Low DCR coils > Iron Core type +- 0.10 Ω | 3%
- Frequency cut-off points: 325HZ / 1680HZ
- 2.5mm2 copper / silver wiring for Woofers
- 1mm2 silver single strand wiring for Heil ESS
- 4R impedance
- 88DB sensitivity
- Frequency range : 30HZ-40KHZ (+-3DB)
- Independent volume : 20L / 60L

Unlike my first project (sealed port), I opted for a Bass Reflex design, with a load volume of around 60 liters and a 22cm high Event mounted in “Down-firing” (FS 29/30HZ ). As you can see below, the MW16TX-8 performs well for Sealed or Ported mounting. ". Acoustic insulation is made via 30mm thick honeycomb acoustic panels. The Crossover is mounted on a magnetic mounting plate and the same goes for the back panel, magnet system.

NB: I drive these speakers via a Topping LA90,+ Fiio K9Pro DAC Dual ESS 9038pro.

Great Heil ESS AMT measurements in its latest version > https://www.hifisound.de/Do-it-your...on-Transformer-Great-Heil-Selected.html#diagr
Satori MW16TX-8 measurements > https://audioxpress.com/article/test-bench-sb-acoustics-satori-mw16tx-8-textreme-woofer

Pictures :

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