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
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 80207395445

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El Diablo
Whiting, US
★★★★★ 1
Garbage
Size: 6FT*6FT, Color: Black
This product is absolute garbage! It literally took all day to put it together and if the air conditioning blows on it the wrong way than the whole thing top over and it falls apart. It’s not made of quality material and is very flimsy. The only reason I’m not returning it is because it’s too difficult to put together and I don’t wanna spend that much time trying to take it apart. Do not buy this!
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Reviewed in the United States on September 25, 2025
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Natasha Spencer
Cuba, US
★★★★★ 3
Cheap
Size: 6FT*6FT, Color: Black
They serve their purpose as long as you leve them in one place and not moving them around and they're kinda flimsy and some of the velcros are cut too short and can't stay closed
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Reviewed in the United States on April 18, 2026
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Susan Cowan
Pawtucket, US
★★★★★ 5
Beautiful, sturdy, lightweight.
Color: Natual, Pattern Name: Divider, Color: Natual, Pattern Name: Divider
This screen is beautiful, lightweight and well-made. There is no splintering of the wood like I read in some reviews. The white fabric is thick and sturdy and even. The brass hinges seem to be high quality and were mounted precisely. This screen came right out of the box completely assembled. It was boxed well and there was no shipping damage. I will enjoy using this as a backdrop when I am on Zoom and as a room divider in my studio. I paid $75 for this and I think that is a bargain! I am very happy with this purchase.
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Reviewed in the United States on April 1, 2026
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Avid dancer
Massapequa, US
★★★★★ 5
Beautiful
Color: Natual, Pattern Name: Divider
Okay now! This is exactly what i needed. Perfect and no assembly required. Love the smell of the bamboo wood. Lightweight and very portable and great size. Ran around town all day the other day and for nothing that wasnt more expensive and just plain ugly. This is absolutely beautiful and well worth the money and it looks beautiful. What is depicted is exactly correct and that’s why there is no need to post another photo.
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Reviewed in the United States on October 24, 2025
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PhilMan79
Lowell, US
★★★★★ 5
Nice panels to hide unsightly areas
Color: Black, Pattern Name: Divider
These are nice panels with a modern look to hide those unsightly places in your basement or utility areas and still allow ready access. Used mine in our large laundry room to block the view of the furnace and water heater in lieu of building a wall. The black and white basic pattern blended well with the walls and white appliances and improves the casual look of the room. I would not call construction overly rigid as they will not stand up to rough treatment or childrens areas well.
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Reviewed in the United States on January 29, 2026

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