SKU: 80207395445

Unison Research Simply 845 Integrated Tube Amplifier

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Description

Unison Research Simply 845 Integrated Tube AmplifierSimply 845 The New Simply 845 ranks at the top of Unison Researchs line of integrated tube amplifiers, second only to the historic ABSOLUTE 845. The SIMPLY 845, like the ABSOLUTE 845, also employs the famous 845 direct heated triodes, tubes well known for remarkable durability and extraordinary sonic qualities. The great advantage of integrated amplifiers is the incorporation in a single chassis of the preamplifier and the power amplifier. This makes

Simply 845

The New Simply 845 ranks at the top of Unison Research’s line of integrated tube amplifiers, second only to the historic ABSOLUTE 845. The SIMPLY 845, like the ABSOLUTE 845, also employs the famous 845 direct-heated triodes, tubes well known for remarkable durability and extraordinary sonic qualities.
The great advantage of integrated amplifiers is the incorporation in a single chassis of the preamplifier and the power amplifier. This makes it possible to eliminate the need for high-cost interconnect cables that are never truly neutral to sound reproduction. It should be noted that in the renewed production of the Simply 845 its size has been reduced by bringing all input and output connectors, strictly gold-plated and of a new type, to the rear of the amplifier.

The great advantage of integrated amplifiers is the incorporation in a single chassis of the preamplifier and the power amplifier. This makes it possible to eliminate the need for high-cost interconnect cables that are never truly neutral to sound reproduction. It should be noted that in the renewed production of the Simply 845 its size has been reduced by bringing all input and output connectors, strictly gold-plated and of a new type, to the rear of the amplifier.

Transformer

As in all Unison Research tube amplifiers, the output transformers in the Simply 845 are of our exclusive design and made one by one, by hand.

A good output transformer is not only the result of a rigorous design, but also the choice of materials particularly suited to act linearly with the intense magnetic and electric fields interacting within it.

The Simply 845 uses very thin Mylar and Polypropylene insulators suitable to contain parasitic capacitance and dispersion of magnetic fluxes as much as possible thus achieving an extended frequency range and very low harmonic distortion.

In addition, the ferromagnetic core employed is considerably different from cores commonly used in audio products and consists of a stack of thin laminations of a special alloy of iron and silicon all insulated from each other, the molecules of which are oriented and fixed in a stable manner to facilitate the flow of the lines of force of magnetic fields.

Circuits

In the Simply 845 all stages, both the preamplifier and power output, operate in pure class A. The preamplifier circuits are fed by stabilized linear-type electronic power supplies designed specifically to minimize interference with mains noise.

In the electronic circuits, all capacitors affected by the audio currents are anti-inductive with armatures insulated by polypropylene dielectrics, the ultimate in current technology. The printed circuit boards used are not of the normal industrial type, but differ in having fiberglass backing, and pure electrolytic copper traces three times as thick as the standard.

The volume potentiometer plays a very important role in high sound quality, and for this reason our choice fell on the famous RK27 motorized Japanese-made ALPS.

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SKU: 80207395445

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cgilber
Waukegan, US
★★★★★ 5
Five Stars
Format: Hardcover
Very informative and should be read by those who seek deeper understanding
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Reviewed in the United States on June 17, 2016
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Amazon Customer
Pawtucket, US
★★★★★ 5
Five Stars
Format: Hardcover
Beautifully translated, a joy to read
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Reviewed in the United States on August 29, 2017
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victor voronin
Chelsea, US
★★★★★ 4
Translation not Literal!
Format: Hardcover, Format: Hardcover
The fist volume had a more literal translation then the second. If first Clement and Didache are in your reading list, Shepard of Hermas will fit there too!
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Reviewed in the United States on March 8, 2018
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Mrs. Bill G.
Lexington, US
★★★★★ 5
Good quality
Format: Hardcover
Good Quality
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Reviewed in the United States on May 14, 2018
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Librarian
Port Orchard, US
★★★★★ 3
At times it has been somewhat repetitive and tedious to read
Format: Hardcover
One of the earliest books in Christianity, The Shepherd of Hermas was probably written around 140AD, and avidly read for the first few hundred years. Likely its failure to become one of the recognized books of the Canon (Bible) had something to do with its fall-off in popularity. Today, while an Apocryphal book from the age of Apostolic Fathers, it seems arcane, and somewhat desultory. Nevertheless, one can see this book as a vision, a dream, or even an attempt to describe elements of purgatory. Both Latin and Greek copies, at least in part have been found, there are also parts missing which make reading it a bit of a challenge. At times it has been somewhat repetitive and tedious to read. I read the edition and translation from the Greek by Bart D. Ehrman: "The Apostolic Fathers Vol. II" from the Loeb Classical Library. The original author was claimed by some to be the brother of Pope Pius I. It is interesting to have a view into what the Council Fathers were looking at when deciding what to add to the Canon, and what not to add. The probings by our minds, between the dark and the daylight, are not so different a few thousand years later. How is God going to judge me and my sins? What must I do to prepare? What is within my ability and what is not? And where do I fit in His Kingdom?
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Reviewed in the United States on October 11, 2014

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