Unison Research Simply 845 Integrated Tube Amplifier
SKU: 80207395445

Unison Research Simply 845 Integrated Tube Amplifier

Sale price$8010.00 Regular price$8900.00
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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.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
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SKU: 80207395445

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林金池
Chelsea, US
★★★★★ 5
Very satisfied with the excellent quality and fast delivery.
Very satisfied with the excellent quality and fast delivery.
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Reviewed in the United States on June 2, 2026
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Dale E.
Louisville, US
★★★★★ 5
Great Sunscreen
Love this sunscreen. What I like most is that it goes on very dry with zero greasy feeling or shine. The sunscreen is also scent free. I’ve seen several review where purchases stated that they received expired product. Mine arrived in January 2023 and expires February, 2024. I highly recommend this product.
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Reviewed in the United States on March 6, 2023
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jeannie
New York, US
★★★★★ 5
A good product
I’m very satisfied with this product. The quality is excellent, it arrived on time, and it works exactly as described. Definitely worth the purchase and I would highly recommend it to others.
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Reviewed in the United States on October 4, 2025
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Runner girl
Birmingham, US
★★★★★ 5
Doesn’t stain clothes and lightweight
Something that always bothers me about sunscreen is how it stains clothing. I did not have that problem with this sunscreen. It was lightweight. It only had a very mild gritty feeling after having it on for over 8 hours and sweating a ton. Best sunscreen out there right now!
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Reviewed in the United States on July 22, 2023
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Cessy
Carnegie, US
★★★★★ 5
The only sunscreen that does not break me out!
I have oily to normal skin with general sensitivity. The breakout-free Neutrogena sunscreens are the only ones that don't break out my face and body, even with reapplication. I have repurchased several times and highly recommend. There is only a slight white cast left over but here's my hack for no whitecast: apply a small amount to fingers and rub to warm, pat to cover face, then rub to blend in, then repeat with another layer. Perfect for underneath makeup, I usually put it on before primer.
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Reviewed in the United States on December 5, 2022

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