Dewaudio – Dewald Visser Audio


[ Products... ]


For the past 20 years, Dewaudio has designed quality products for the audio industry. From designing microphones for recording studios, to building stereo amplifiers for home audio, the business is always ready to take on a new challenge. Improving the quality of electronic equipment is an enjoyable challenge. [ More details about the early days... ]

Dewald Visser, owner of Dewaudio

Electronics designer and music lover

Valve-based amplification has a special place in our hearts. What is today seen as vintage, is every bit as relevant as before.

Undertaking a variety of projects that have to do with audio, I can assist with just about any requirement. Designing amplifiers and microphones is my focus but other repairs are also undertaken. Most of all, I find great enjoyment in music, and seeing others do the same.


I focus on electronics and making things work properly. I have always had a thing about items that do not work they way theu should. An amplifier delivering less than its specified output rating; a loudspeaker that distorts, a turntable that just does not sound right, or a microphone that does not do justice to the artist's voice – these are just some of the things in my craft that I absolutely must fix.


My passion for high-fidelity audio began in my local community, where I spent several years honing my skills as a repair technician for audio equipment. This experience formed a solid foundation for my career path in the industry.

In 2008, a series of fortunate events culminated in the design and creation of my first turntable, the Moxey, complete with a custom tonearm. I proudly showcased this creation at the Sound and Vision Expo in Johannesburg, marking a significant milestone in my journey.

In 2010, I joined Bop Recording Studios, immersing myself in the world of high-end audio production. Here, I gained invaluable experience repairing and maintaining a diverse collection of vacuum tube-based equipment, deepening my understanding of their intricate workings. This opportunity also allowed me to witness the magic of the music industry first-hand and contribute to a few recordings and albums.

While at the studios, I developed a deep appreciation for reel-to-reel tapes, cherishing them as the most faithful source for recorded music. The tactile experience of holding and inspecting these physical formats, coupled with the marvel of their technology, surpasses what modern streaming services and even CDs can offer. It is no wonder that these "old" formats are experiencing a resurgence in popularity, even among young people.

In 2016, I became the proud owner of a Linn Sondek LP12 turntable, an iconic piece that has left a lasting impression on me. This ignited a passion for servicing and upgrading this legendary model. Simultaneously, I embarked on designing and building valve-based amplifiers and phono stages, further solidifying my expertise in audio engineering.

My desire to create premium handcrafted stereo amplification equipment continues to drive me forward. This passion has led to the development of the Starmap and Startrail series of top plates, bases, and sub-chassis for the Linn Sondek LP12, which have garnered significant appreciation from clients who value their transformative impact on sound quality.

Currently, I offer the Dewaudio Trinity valve phono preamplifier to discerning high-fidelity aficionados. Each piece is crafted with meticulous attention to detail, ensuring exceptional sound quality and lasting performance.

My work is characterised by a commitment to batch-builds. Each season brings a limited number of specific models, meticulously tested and packaged before being offered to the public. Every hand-crafted piece embodies the highest standards of quality and sonic excellence.

I am deeply grateful for the journey that brought me here and excited for what the future holds. As I continue to explore the world of high-fidelity audio, I am committed to crafting exceptional products that enrich the listening experience for passionate audiophiles like me.


Here are some images of projects I have worked on, design work I have done, sometimes in conjunction with others, and random photos taken in the life of an electronics enthusiast.

  • All
  • Amplification
  • Loudspeakers
  • Microphones
  • Mixing Consoles
  • Reel to Reel Tape
  • Turntables
  • Valve Technology
  • Various
On occasion I dabble with moving coil cartirdge repair. This was a Denon DL-103 with a new cantilever fitted.
A live recording session at the Aula auditorium at TUKS.
The Dewaudio Tsungai amplifier set with a pair of Vandersteen Quattro speakers and Van Morrison.
At Bop Studios with the SSL4000 Mixing Console.
At the Vivid Loudspeaker factory circa 2013.
Tapes and microphones! The equipment that makes the music industry go around.
In a bluesy mood with the Dewaudio Firecat preamplifier
This custom made amplifier stack was completed in 2022 for a client in Johannesburg. Based on various modules from the First Watt series by Nelson Pass.
With Alani Keiser during the recording of The Isaac Macoy Collection album, using a pair of Pearl Microphones in a stereo array.
At another SSL recording console.
B&W 801 loudspeaker at a friend's place. There is a story behind this setup.
An image of equipment in listening room.
ABBA museum in Stockholm. Polar Music Studios Harrison 32b/c mixer built by Björn Ulvaeus and Benny Andersson in 1978.
My cat the audiophile
A microphone is always listening. This is a Manley Reference Gold in for a service.
An SSL console PCB module during repair.
Closeup of a Lowther P6M full-range loudspeaker driver.
At the M2 Studios SABC during a recording seession in 2012.
A Studer A810 master tape recorder during testing
I love vintage test equipment and this is a 1940s SICO tube tester from my collection.
Cats and Hi-Fi. Kwai keeping me company.
John Mayer on my Linn Sondek turntable.
A custom built microphone based around an M7 capsule. This one was clad in real leather and is referred to by its client as “Veldskoen”.
Dewaudio is very interested in microphones and the technology driving them.
The magnet side of a Tannoy Monitor Gold loudspeaker driver. This is what real hifi is made of!
A pair of custom crafted tube amplifiers during final assembly in mid 2018
Dan Patlansky live - one of South Africas best music exports!
This was a custom device I made for a client who became one of my best friends. Sadly he passed away in 2021.
A closeup shot of a custom KT88 push-pull amplifier I built in early 2018.
A custom Dewaudio tube preamplifier for a rare Esoteric Audio Research tube amplifier.
During master tape transfers in the summer of 2022.
Now and then even an electric guitar gets a bit of treatment. This is a beautiful vintage Hagstrom electric guitar.
At an SSL mixing console in Johannesburg.
Now this is a subwoofer. At one of the Rey Audio Kinoshita low frequency driver system at BOP Studios circa 2011.
Cats and Hi-Fi equipment pretty much sums up my daily life. This was a lovely little rescue called Purdy in 2021.
DA custom Dewaudio tube preamplifier for a client circa 2020.
The inside of a M7 capsule based microphone.
Always listening for exquisite sound. It's got to sound right.
Recording guitars in early 2017.
Vacuum tubes fascinates me to no end. It is quantum physics in action.
The Dewaudio Tsungai amplifier set amongst distinguished loudspeakers.
A NAGRA E tape machine during testing. A lot of Nagra tape recorders have passed through my hands.
At a lathe making a custom brass pod for a tonearm.
The Dewaudio Tsungai Prototype set late 2020.
The Dewaudio Tsungai amplifier set taking shape.
At Openroom Studios in Greenside Johannesburg.
A handheld Neumann microphone repaired.
A beautiful custom made tube preamplifier for a production studio.
Where it all started - at my folks Sanyo music centre circa 1984.
My god-child Lillian with my personal hifi rig December 2021
The very first prototype of a Dewaudio preamplifier.
Dewaudio specialises in the design of new amplifiers, and repair of just about any other make.
The Dewaudio Firecat at Bop Studios
During late 2020 and early 2022 I digitised 1400 master tapes for a local record label.
A repaired Neumann U87 microphone. I have repaired a lot of U87s during the years.
A well-used EMT 930 turntable before restoration.
Dewaudio has designed a new subchassis for the Linn Sondek LP12. The first Dewaudio Startrail LP12 sub-chassis in 2019.
A beautiful Revox PR99 tape recorder from my collection.

One of my favorite custom turntable builds was this Garrard 401 with Fidelity Research tonearms and Koetu cartridges.
One of my favorite phono cartridges of all time. The Benz Micro Ace. This one was slightly modified by me.
A heavily modified Lenco L75 turntable that I built in 2017 for a client.
At the Pearl microphone factory in Astorp, Sweden circa 2016.
Tape transfers circa 2020 with my beautiful Tic-Tac keeping me company.
My own Linn LP12 Sondek with a custom Cherry wood plinth.
Jeff Beck and my Linn LP12 Sondek turntable.
An early turntable build with an SME 3012 tonearm. It sounded good!
A Fostex E2 tape recorder at a client's place.
The very first custom turntable I have made. A Lenco L75 with a wooden tonearm. It sounded very good. This was circa 2006.
Calibrating an Otari MX-50 tape machine.


My services include the following:


I design solutions for areas such as suspension systems for turntables and many clients around the world use our Starmap and Startrail components in their Linn Sondek LP12 turntables.

Valve Technology

I love working with valve technology. Apart from designing and building valve amplifiers, I also service older amplifiers, and have even designed valve-based amplifiers for studio microphones. [ Trinity RA-2020 Phono Stage ]

Electronic Repairs

Contact me for service and repair of specialised audio equipment in both the domestic and professional environments.



Cullinan, Gauteng, South Africa


072 039-5379


By appointment only