I have finished my ATS4 last week. I really enjoy them. In my attachment
I have included some feedback and pictures of my build to contribute to
your great website.
Many, many thanks for sharing this and your aid on my questions.
Frank, The Netherlands
First of all I wish to give my sincere gratitude for posting such
high-end speaker designs.
This was my second build, the first being a scan-speak reference plus
design using pre-cut panels:
I have sacrificed the adjustable tilt angle on mid/high to allow for an
IMHO more pleasing tight design (they are in my ‘family’ living room).
The phase-centers of the mid/high correspond with a 3 deg tilt angle for
both mid/high in the original design. In my view fine with my listening
position being 4 to 5 meters. I once replaced my Teflon internal speaker
cables with Kimber 8TC and noticed a significant improvement, thus given
the large length of the internal cables, I bought some second hand
Siltech FT12 G3 for mid/high with twin lead for upper bass. I used the
Jantzen copper kit-cable for lower bass which is good enough. I don’t
use biwire, given a fixed budget, I think single wire gives best
cost/performance ratio. For the mid I used Jantzen silver caps only. For
the high I switched to Mundurf Silver/Gold/Oil capacitors and M-resist
Supreme resistors following the experiences of Tony Gee:
The mid/high crossover is a closed compartment to make the design more
appealing. The resistors to tune the tweeter level are placed at the
base of the speaker. I prefer the 1 Ohm setting so far.
My impression of the sound in just one word: ‘Incredible’. They are in
every way exceeding my expectations given my already nice scan speak
reference plus. The sound is clear, transparent, fast with incredible
dynamics and natural sound. I can listen for hours without any fatigue.
The soundstage is very very deep and wide, with very clear positioning
of the instruments and voices, I can see deep in the recording. Female
voices are breath-taking. The instruments in classical music sound very
real (my wife who plays cello highly agrees) and can be clearly
identified in a big orchestra. The upper bas with closed cabinet really
gives the fast punch I was hoping for. The lower bass gives plenty of
lows. The reserve of my 60W class A Luxman M800a gives enough power to
make the cones swing even at thunderous levels. To make a comparison; a
friend of mine owns B&W 802 and dcs/Krell set, which sound I’m familiar
with by now. He hasn’t heard them yet, but I’m pretty sure he will go
home wining and wondering. I have them running for one week now, I don’t
know about burn in time, but these are my experiences so far.
Once more, many thanks for this great design; these will give me many
years of joy.