Matej Isak - Publisher, Owner, Operator, Founder, Editor-in-Chief


I really like what you have done with your site, it is one of the first places I look these days to see “what else is going on”.

Alon Wolf

Magico LLC

"In this world where everything goes so fast, there are still people who take the time to do the things with rigour and consciousness. This is the case of Matej Isak, true Ambassador for the audiophile community, which always takes the time to test new equipment, with the passion that is known of him."

Hervé Delétraz,

founder and CEO
 darTZeel Audio SA

"Matej Isak of Mono and Stereo is one of the few audio reviewers, which do their job with passion and emotions, like he is choosing equipment for his own audio system."

Flemming E. Rasmussen

CEO & Founder Gryphon Audio

"Matej Isak of Mono and Stereo is a guy we should everybody thank, not only for his great professional attitude, not only because he is among the few reviewers showing, in every single moment you talk with him, such an enthusiasm, such a pure passion that becomes immediately clear how much he truly loves music reproduction. The big “thank you” is because Mono & Stereo is a fresh, young and powerful vehicle to spread all over our beautiful passion and to enrich the audiophile community worldwide."

Paolo Tezzon 

Sonus faber, R&D Manger

"Matej Isak is one of the few audio journalists in the world who has the depth, commitment, honesty, and taste to be a real guide to the reader. Most magazines give the best reviews to their biggest advertisers; Matej is not for sale. He has great ears and knows what music is. Many audio reviewers give little of substance if not misleading or even false information. Matej has the solid judgment and courage to say what he thinks and take a stand for good engineering instead of politics and payoffs. In a sea of spineless audio journalism, Matej has integrity and balls. His advice is good as gold."

Mark Levinson

High end industry audio legend
founder and CEO of Daniel Hertz

"Mono and Stereo truly has their finger on the pulse. It is refreshing to come across a person such as Matej who, with such honesty and enthusiasm for both music and equipment, has become instrumental for those who like to be informed. Our hearty endorsement to such a fine project!"

Robert Koch,

Robert Koda Audio

"Mono & Stereo became the number 1 audio webzine in my opinion. Nobody else covers so many news so early. Whenever any other mag writes about something, it is old, because you already had it on your site! Good job! Keep on the great work you are doing for the audio community."

Thomas Mayer

owner of Vinylsavor, high-end audio designer

"Matej Isak, Has single handedly done, what Gordon Holt of Stereophile and Harry Pearson of The Absolute Sound did in the past, with the printed word, in that of todays cyber domain of digital publishing, with the same passion and power of observation."

Kavi Alexander

President, Water Lily Acoustics

"We, Sibatech, export agent for various tube electronics equipments and analog gears as cartridges and tonearms, all developed by respective Japanese experts, have appreciated words and advice, raised by Mr.Matej Isak for further products development and improvement to figure out even more fascinating products, to appeal to world wide audio enthusiasts."

Hiroshi Ishihara

Director Sibatech,Inc.
Higashisuna, Koto-ku,Tokyo, Japan

"Matej Isak is truly first and foremost a dedicated audiophile who has managed to turn his passion into a business and calling. He's always on top of the industry news and is a great purveyor of knowledge to the audiophile public, including those yet undecided or even 'uninitiated' outsiders."

Louis Motek, 

LessLoss Audio,

"Matej Isak is truly one of the great resources in high end audio today. His knowledge and familiarity of audio equipment is rarely surpassed. Matej's diligence for searching out new equipment, how and how well it works, and bringing that information to his readers is matched by few. Truly one of the hardest working people in audio today."

Jonny Wilson, 

President, Snake River Audio

"Matej Isak has the whole package: A good ear, long experience in both analogue and digital playback and a curious mind."

Anssi Hyvonen
Managing Director
Amphion Loudspeakers


Twenty years of active traveling through the unique world of high-end audio has led me to know many brands, people, and objects of both rejoice and sometimes sorrow. All these experiences have unmistakably shaped my vivid perception about audio, music, and high-end industry and manufacturing. It is my goal and passion to listen to, review, and reveal great and carefully engineered upscale audio products.

Most of our daily readers are audiophiles, audio connoisseurs, manufacturers, dealers, music lovers, and owners of high-end audio components. These individuals not only recognize and respect real artisans of the audio industry, they're also willing to spend their respected money for high quality audio products.

There are still people who trust in the knowledge, efforts, and heritage of upscale audio manufacturers. High-end audio is becoming more and more personal with a strong connection developing between customers and manufacturers. Honest customer service, quality products, and satisfied music lovers are the real keys opening the doors to high-end society’s mutual existence and satisfaction, now and in the future.

As a devoted fan of music and high-end components, I'm in a constant search for unique audio instruments that speak back to us naturally and cherish the unique world of music reproduction. In my audio quest, I'm striving to reveal those individual products that convey music with the highest impact of its coherent, natural impression regardless of price.

After years of listening and testing a large number of audio components that have passed through my listening room, I dare conclude that only those who profoundly love, respect, and know music strive for the absence of a specific sound imprint and try to balance natural, transparent, and signature sound in their audio products. It's always a joy to find such exemplary products and the people behind them.

At the end of the day, music truly is quite simple. Duke Ellington's famous quote sums it up beautifully: "If it sounds good, it's good!”

Happy reading and listening.

For further insights, please see the references above as well as on the website. Thank you!

Matej Isak