PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.pdf

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9/25/2019
PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.
The Robb Collections
The Continuing Saga of a Humble Blogger
PROTON Audio, NAD and Dynaco are Cousins. Inventor
of Dynamic Power on Demand Ampli ers.
July 11, 2018
July 11, 2018
#257
Foreign language brochure, shows AA-1200 power amp.
Gentle reader,
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PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.
As you know,
I have been into good stereo equipment on a budget since 1976 when, at 19, I built a
Dynaco PAT-5 preampli er and a pair of SWTPC Tiger .01 60 watt mono power ampli ers. For speakers,
a pair of oor-model Dynaco A-25s. Turntable was a B.I.C 940 with walnut base, smoke dust cover and
whatever cartridge came with it.
Since I
came across blogger.com, and tried my hand at this blogging thing, to my surprise people like
what I write about. A lot of people. So thank you for taking the time to read my humble words and view
my photos.
NOTE:
Almost all of the photos in this article were culled from Internet searches and from eBay
active auctions. IF you made any of these photos, please let me know so that I can credit you. 
ALSO NOTE: If reading on a PC
, if one clicks on any photo, a window opens in front of this
page and one can click or use their arrow keys to see the photos
larger.
This is a long article,
but if you are interested in PROTON or have never heard of it, bear with
me as I open your eyes to this unique company that made some truly remarkable components, many of
which are highly sought after to this day.
 
Those of us
in the home audio community are no doubt familiar with NAD components. I had a
receiver they built. NAD is an abbreviation for New Acoustic Dimension.  NAD components were built in
Taiwan, a Chinese country on a large island south of China. Mainland China is not happy that Taiwan
continues to refuse to rejoin the mainland country. But this article is about stereo equipment and not
geopolitics.
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PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.
Above shows a NAD receiver I once owned.
 
This is the back of it.
Keep this image in mind when viewing later photographs of PROTON
equipment. Below is a NAD receiver, which I did not own, but am including for reference. Compare it's
rear view to the PROTON D540 shown further below.
NAD is well
respected as is
Dynaco
which is a much older company and originally American.
PROTON came about in the early 1980's and were built in the same factory as NAD equipment, but of
course they were completely different circuits and products.
My
2002 Orion Blue Book
on Audio lists 77 separate PROTON items. They also list a great
number (33, I just counted) Dynaco by PANOR components which were later also made in the same
factory. I wrote about that here:
Dynaco Given a Second Life. Pan Orient Company: Panor for Short. A
Photographic History PART ONE. 
Yet, my research
for the three-part article on PANOR, the company that produced the 1990's
Dynaco equipment, also from the same factory, revealed far less devices that actually made it to the
public. Those articles and all the rest of my articles on Stereo equipment can be found here:
https://therobbcollections.blogspot.com/2018/07/proton-audio-nad-and-dynaco-are-cousins.html
EVERY Bl
A ti l
I H
E
W itt
d Ill
t t d Ab
t St
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PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.
EVERY Blog Article I Have Ever Written and Illustrated About Stereo
Equipment and Speakers Galore!
So where am I going with all of this? Glad you asked.
I discovered PROTON
equipment quite by accident, or should I say, in the usual way: on eBay. I was looking for a preampli er
and came across a PROTON D540 integrated ampli er which, like the NAD receiver above, could be
electrically separated into a preampli er, power ampli er or perhaps both at once.
If you are noticing
a trend here of photos showing more of the top than the front of these
components, you are correct. The hardest thing to photograph are black or shiny, due to re ection of
the ash causing glare on part of the face and darker to the sides.
Note the
section.
similarities with this rear view and that of the NAD? Same: ground screw, gold phono
terminals, white stripes between RCA terminals, same "U" jumpers between preamp and power amp
Dynamic Power on Demand
, as mentioned above, is a PROTON invention. 
article he said,
A contemporary
review from
Stereo Review
magazine by Julian Hirsch which completely explains the way it works. In the
"The
Proton D540 is not only the most powerful '40-watt' ampli er
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The Proton D540 is not only the most powerful 40 watt ampli er
we have used, it is one of the few of any rating whose capabilities begin to
encompass the dynamic properties of live music."
I wrote about that here:
Details on the remarkable PROTON D540 Integrated amp's huge 530 watt
power output.
 
article he said,
PROTON Audio, NAD and Dynaco are Cousins. Inventor of Dynamic Power on Demand Amplifiers.
PROTON went on
and built on their fantastic circuits putting them in separate Power Ampli
instantaneous clean power upwards of 500+ watts to handle crescendos with aplomb.
ers
as well. Starting with the AA-1150 in 1987. 50 watts-per-channel with the
DPD
circuitry produced
Isn't it lovely?
Everyone loves VU or watt meters and these babies look so good with green back-lit
markings. Sadly, I have not been able to afford any PROTON power ampli er. But have had two D540
units and can testify to the accuracy of the claims (and test results) of the
DPD
circuits. It works as
advertised and no discernible distortion could I hear.
According to
Orion,
they made a total of seven power ampli
big prices. Their
DPD
legend precedes them.
ers including one 4-channel, one 5-
channel and one 6-channel model. Those that appear in seaches, and I've only seen stereo ones, go for
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