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Unison Research S9

Unison Research S9
alaAverage 3.5

2 reviews

May, 2018

alaTest has collected and analyzed 2 reviews of Unison Research S9. The average rating for this product is 3.5/5, compared to an average rating of 4.1/5 for other Receivers & Amplifiers for all reviews.

On average, users rate this product 40/100 and experts rate this product 100/100.

Review analysis

(Based on 2 reviews)

Expert Reviews  

User Reviews  


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Showing 1 - 2 of 2 Show Reviews: in English

Expert review by : What Hi-Fi? (

Unison Research S9 review


This valve driven amplifier would be a guaranteed talking point if it was a part of your kit. We can't help but love its quirky styling and great soun

A sweet and seductive presentation ; wonderfully revealing midrange and treble performance ; lovely build

Not the ideal amp to rock out with ; runs very hot ; weight and awkward size

The Unison Research S9 is an intoxicating combination of brilliant and barmy. We can’t help but love it

Jan, 2010

Consumer review (

Unison Research S9


This amp is horrible. The shrill of the SV572 sounds thin ,sterile, annoying and makes you want to leave the room and make coffee. Sounds loud and powerful but you just keep turning it down. Change i/p tubes to amperex then mullard and still not enough...

May, 2012