WELCOME TO ACAPELLA

For over 45 years, we have been dedicated as a loudspeaker manufacturer to the goal of bringing music in all its facets and inspiration closer to people. To this end, we lovingly craft speakers from the world’s best components, tuned as complete instruments to serve as ambassadors of the music.

NEWS

Interview Hifistatement

Read the wonderful Hifistatement interview (in German) on the occasion of our move to our Sonic Sanctuary in Isen and learn lots of interesting facts about our history and the future direction of Acapella. Enjoy!
(photo: hifistatement.net)

Enter the Acapella Sonic Sanctuary

We are delighted to announce the opening of the Acapella Sonic Sanctuary situated inside the penthouse on top of the HECstore in Isen near Munich.
Join us in celebrating a space dedicated to extraordinary sound, refined design, and an immersive listening experience. We look forward to welcoming you.

Breaking

From February 1, 2026, Acapella loudspeakers and electronics will be available exclusively through authorized dealers—direct sales through Audio Forum in Duisburg will be discontinued on February 1, 2026.
We are looking for sales partners. Please send us an application if you are interested.

ABOUT ACAPELLA

Thoughts are born, ideas are thought through and know-how is taken by us to extremes. We have developed the most innovative technologies, increased efficiency and enhanced the level of performance. And yet, we did not embark upon this path to put knowledge, skills and pioneering spirit in the foreground, but to make this very special feeling even more tangible: the absolute enjoyment of listening to music.


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CREDO

Music is a key element within our emotional quality of life. It becomes authentic and immediately tangible by playing musical instruments. In the world of music playback, on the other hand, music is being often “administered” by devices …

Administering does not go well with emotions, neither does constriction partner with experiences. However, devices are essential to have music of any kind available at any time and in any location. It is our responsibility to build the bridge between the musical and the technical worlds.

According to our ideal, devices become instruments. Outside and inside become one, as close as possible to the human being, to the senses, to the core of human existence. Optimum sound, broadest longevity and an exceptional functionality are the workpieces to shape this bridge.

All loudspeakers are lovingly handcrafted in our manufactory and serve as ambassadors to the goal of making music tangible to the human being. They arise from the sheer love for music, harmoniously composed to a synthesis of the arts, embodying a unique combination of design, function and technology.

45 YEARS OF FASCINATION FOR LOUDSPEAKERS

Our Acapella loudspeakers stand for the fulfilment of a musical dream unique in its kind.
Since being founded 45 years ago by Hermann Winters (1) and Alfred Rudolph (2), we are considered one of the world’s technology leaders among manufacturers of horn loudspeakers. We have set milestones in development with the ion tweeter (3) and the spherical horn (4). Both developments secure us unique selling points compared to our competitors. The ion tweeter is the first light-as-air system that excites the air via a massless plasma flame and generates sound without tonal discolouration. This makes it clearly superior to all other conventional designs. The spherical horn doesn’t colourate as well and impresses with a highly dynamic sound. With great success, our products have been presented the first time to both public and a worldwide audience at the IFA consumer electronics fair in Berlin.

THE CHARM OF THE EXTRAORDINARY

In the 1980’s we get started as “Acapella Audio Arts”. Many exceptional speakers that meet the highest requirements in terms of sound, technology and design, shape this phase of creativeness. In addition to the ion tweeter ION TW1S (“S” for spherical), the product range already includes the speaker models Fidelio, Triolon, Celestron, Celesta MK 2 and 5th Avenue (4). We busy ourselves intensively with time-coherent systems, resulting in outstanding creations such as the exceptional transducer Sarastro (7), which is still used today in renowned recording studios as a reference system.

THE AESTHETICS OF THE PARTICULAR

Out of this wealth of ideas, the models Violon (8) and Campanile (9) are created in the newly occupied production premises in Duisburg. The first-mentioned represents our best-selling system with over 1,000 sold units. The latter, the Campanile, is now being offered in its fifth generation and has accompanied many of our customers for almost 30 years. Both loudspeakers continue to set standards in terms of sound, technology and design. Their foundation is grounded on a timeless idea that has retained its youthful freshness. And that’s because our continuous further developments offer even customers of the first hour upgrades to the current status. So every new generation of Violon and Campanile is a new start for an even better version. Ownership periods of several decades are not uncommon among our customers. It is important to us that our loudspeakers represent dreams that are achievable and have a long-term validity.

INNOVATION WITH PASSION

Since the turn of the millennium, the resonance optimization of electronic and mechanical components has become our focus in the search for the best possible sound. Elaborate measuring methods (10 – nicht unbedingt->siehe Foto) prove the positive sonic effect on the playback quality. Among other things, bases (10) for speakers and electronics are the results of this work and lead to the awarding of numerous patents. Another result of our relentless thirst for research is the hyperspherical horn (11). The transmission range increases from the common three octaves of
“normal” horns to now over five octaves by at the same time providing a distortion-free spatial imaging. All technical parameters are optimized and lead to a much better sound in every respect. A new generation of loudspeakers is born.

An Acapella speaker is not an everyday speaker. But a speaker for every kind of music.
It is not only the passion for designing loudspeakers, the will to perform, the urge for precision, the pursuit of superlatives, but also the sense of aesthetics and the sense of functionality that characterize our loudspeaker creations. All our fields of knowledge now converge into one another better than ever: architecture, electrotechnical knowledge, resonance optimization, material expertise, knowledge concerning spherical and hyperspherical horns and ion tweeters. All of this following the dream of the best loudspeaker, to which we get a little bit closer with every idea day by day.

THE ACAPELLA PRINCIPLE

Within the current hyperspheric horn series we follow a plan, an ideal that unites us all at Acapella. The principle being to get the maximum out of the given possibilities. Because it’s very much about the intelligent way to convert electrical signals into speed and musicality. Out of the Violon arises the Cellini (12), out of the Violoncello the Cecilia (12), and out of the Campanile the Campanile 2 (12). Above these models ranges our top series with Atlas (13), Apollon (13) and Poseydon (13). All of them are more instrument than loudspeaker – and ambassadors of music. This statement sums up everything that matters to us. As a brand. As a company. As a speaker manufacturer.

TRADITION IS OBLIGATION

For more than four decades, we have been moving forward with a great sense for performance and passion – and with a lot of impetus. Always developing new models. Incoporating more and more innovation. And craving for more and more musicality. And that’s how our future will look like as well. Richard and Robert Rudolph (14) have joined the company management by bringing in their young and fresh know-how. They grew up in the tradition of Acapella Audio Arts. The enthusiastic guitarist Richard has been a valued member of the Acapella mothership for more than ten years. He follows in the developer footsteps of his father Alfred.

TOGETHER WE WORK DAILY ON NEW AND EXCITING PRODUCTS FOR OUR WORLDWIDE CUSTOMERS. WITH MASTERLY CRAFTSMANSHIP, QUALITY MATERIALS AND AN AESTHETICS OF LASTING VALIDITY.

PRODUCTS

First, here is an overview of the actual dimensions of our loudspeakers. You are welcome to download the poster for personal use. Click to zoom and Enjoy 🙂

Harlekin 2

For more than twenty years, our Harlequin has marked the entry into the musical world of Acapella Audio Arts. Moderately proportioned, sonically a great success.
To ensure that this remains so in the future, we set ourselves the task of transferring the experience gained from the development of our reference systems Hyperion and Sphäron to the Harlekin.

La Campanella 2

The LaCampanella 2 has now become a part of the Acapella family.
Equipped with the new technology of the hyperspherical horn it ensures more playing pleasure and maximum dynamics in every listening room.

High BassoNobile MK II

With this speaker, we combine a homogeneous, authentic sound with a dynamic powerful playback. And that in close conjunction with a tangible three-dimensional imaging.

Cellini

No matter how you look at them, the Acapella Cellini and High Cellini are truly exceptional. Their groundbreaking combination of exclusivity, functionality, and captivating sound is based on more than forty years of experience in loudspeaker manufacturing. They embody everything that defines our company’s DNA.


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High Cecilia

The sleek and beautifully designed Cecilia is made from the best components we have developed from over 40 years of experience in loudspeaker construction.
The hyperspherical horn, combined with the ion tweeter and precisely coupled rich bass, makes the Cecilia an exceptional loudspeaker in its class.

Campanile 2

Room-high speakerpillar with ion tweeter, hyperspherical horn and four 10-inch-woofer at the front.

Atlas

Elegant speaker sculpture with the big hyperspherical 780er broadband horn, ion-tweeter, two 10-inch-woofer at the front and one subwoofer in the cabinet.

Apollon MK ll

The Apollon is a harmonious masterpiece from Acapella.
This beautifully designed system with its unique sound incorporates over 40 years of expertise and innovation in loudspeaker construction.

Hyperion

With the Acapella Hyperion we have created an exceptional transducer, capable of moving the standards in music reproduction. A musical titan, that rightly bears its name.
Whether the delicate tone of a flute, the unleashed force of a large orchestra, or the immediate dynamics of a drum kit, the Hyperion sees itself as a mediator of the highest competence.

Energèia Reference

CLOSER TO THE NATURE OF MUSIC! Ultimate amplifier electronics for high-performance loudspeaker systems.
Handmade in Germany by Acapella Audio Arts.

THE LEGENDS

Triolon Excalibur MK V

What moments are worth to be remembered? It is the ones in which we feel free. In which we get inspired anew. In which each and every detail is perfect. Moments in which we perceive the world with all our senses, moments which touch us with their pure force. Moments in which time appears to come to a standstill because we encounter something extraordinary, such as the Triolon Excalibur MK V.

SPHÄRON EXCALIBUR

The Sphäron Excalibur is the largest loudspeaker system ever built by Acapella. It sets the standards worldwide and ascends far beyond precision, plasticity and dynamics. Offering 2.30 meter of height and 600 kilograms of weight per speaker, a superlative has emerged in which technology becomes pure emotion.

THINGS TO COME …

HYPERSPHERE

The new HYPERSPHERE is created to be the largest, fastest and most dynamic system ever built in the history of high-end audio. This final statement will be limited to 5 pieces worldwide, created by ACAPELLA mastermind Alfred Rudolph. In his musical journey of creating timeless icons, this hyperspherical loudspeaker system is the culmination of nearly 70 years of research into the enjoyment of music.

WHERE TO BUY

We Are expanding our international reach – if you are interested to buy an acapella product or want to open an international distribution or dealership in ‚uncharted territory‘ please do not hesitate to contact us


SHOW authorized dealers

Germany

HEC Store Munich
Bürgermeister-Hallwachs-Straße 8
D-84424 Isen (near Munich)
+49 178 7200273
info@hecstore.de
www.hecstore.de

Audio Forum HiFi-Studios GmbH
Kurfürstendamm 150 / Eingang Nestorstraße 56
D-10709 Berlin
+49 30 892 68 11
mail@audioforum-berlin.de
audioforum-berlin.de

Uwe Heile Hifi Studio in Falkensee
Münchener Str. 5
14612 Falkensee
+49 33 22 2 13 16 55
info@berlin-hifi.de
www.berlin-hifi.de

finesthighend Hifi
Habichtstr.9
44357 Dortmund
+49 231 13 78 78 46
+49 152 51 82 20 29
info@finesthighend.de
https://finesthighend.de


Netherlands

Sound Design Import – NL


Portugal

Exaudio


Italy

Audio Reference srl


Turkey

Sound at Home


Great Britain

Audio Reference UK


Canada

Tri – Cell Enterprises


Brazil

Logical Design


UAE

High End Dubai


China

Taihong Li


Vietnam

Audio Ha Noi


Saudi Arabia & former Yugoslavia

Unbelievable Audio GmbH
Bürgermeister-Hallwachs-Straße 8
D-84424 Isen (near Munich)
+49 9126 2604 530
info@unbelievableaudio.com
www.unbelievableaudio.com


‚uncharted territory‘

Unbelievable Audio GmbH
Bürgermeister-Hallwachs-Straße 8
D-84424 Isen (near Munich)
+49 9126 2604 530
info@unbelievableaudio.com
www.unbelievableaudio.com

HEY DISTRIBUTORS …

We are looking for sales partners. Please send us an application if you are interested.

Contact

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