Four brands, one Dutch engineering heritage — each pursuing excellence in its own way.
Siltech Group represents the shared pursuit of excellence that unites Siltech, Crystal Cable, HMS Elektronik, and Sphinx Audio — each distinct, yet each part of a greater family, each crafted with its own philosophy yet connected by the same pursuit of precision, purity, and musical truth. Our brands do not compete — they complement. Each brings something unique to the world of high-end audio, forming a complete ecosystem built on 40 years of craftsmanship and innovation.
Since our inception in 1983, Siltech has become one of the more established names in the high end audio industry, with strong brand recognition worldwide. Being the origin of our company, all our other brands originated from or carry the influence of the Siltech DNA. In the 1980’s and 90’s, Siltech owned, developed and produced Sphinx Audio, and Crystal Cable originated from Siltech in 2004.
Siltech
Siltech is a purveyor of some of the finest hi-fi equipment in the world. Decades of hard work, rigorous science, and a passion for music — now you understand the story of Siltech.
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Crystal Cable
Crystal Cable reveals the virtuosity of instruments and the subtleties of performance. Pure and without colour — a time machine for music lovers that brings an artist's vision to life.
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HMS Elektronik
Estd. in 1975, HMS Elektronik has become synonymous with technology-driven quality audio. Known for engineering expertise, HMS has built a dedicated following of audiophiles.
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Introducing
Siltech Group Cable Advisor
Choosing the right cables for your audio system can be a complex and deeply personal decision. To make that process simpler, we have developed the Siltech Group Cable Advisor — an intelligent tool that listens to your system and your priorities, and guides you toward the cables that will make the greatest difference in your listening experience.
01
System Analysis
Describe your existing components and the advisor builds a clear picture of your system — understanding what it already does well and where the greatest gains can be made.
02
Sonic Priorities
Tell it how you want your system to sound. Whether you value transparency, musicality, or dynamics, the advisor identifies which cables will bring you closest to that vision.
03
Tailored Recommendations
Receive a curated selection from across the Siltech, Crystal Cable & HMS Elektronik ranges — matched precisely to your setup, your priorities, and the way you listen.
04
Clear Reasoning
Every recommendation comes with a clear explanation of why that cable will make a meaningful difference — so you can make your decision with complete confidence.
Driving our development
International Audio Holding is pioneering the development and production of high-end audio equipment. By leveraging decades of research, a first-class production facility and the highest quality materials, we strive to bring the ultimate musical experience to the homes of music lovers around the world.
Electronics
Beyond the Cable
A Complete High-End Ecosystem
Cables carry the signal. Electronics shape it. Together, they define the listening experience. Siltech Group's story does not end with cables — it extends into the world of high-end loudspeakers and electronics through Sphinx Audio, completing our vision of a single destination for every dimension of your hi-fi system.
Sphinx Audio
A Legacy Reborn
Born from the same Dutch engineering heritage, Sphinx Audio carries forward decades of award-winning loudspeaker and electronics design. Where our cables reveal every detail in the signal, Sphinx ensures those details are translated into sound of breathtaking physical presence — sculpted, precise, and deeply musical.
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Element 3
Crafted with Zero Gravity™ Bass and a sculptural cabinet inspired by the harp, the Element 3 delivers an open, natural soundstage with breathtaking clarity.
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Element 5
Designed for scale and impact, the Element 5 pushes bass and detail to new depths — bringing you closer than ever to the emotional core of your favourite recordings.
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