My name is Menno de Graaf, a DIY audio enthusiast. For about 20 years, I am designing my own audio equipment. It all started with speaker design, but more recently evolved to the design of audio equipment, in particular audio electronics.
With the products on my website I hope to help DIY builders to build their own audio equipment. Therefore I make PCBs, kits, cables, connectors and electronic components available. PCBs and kits have been designed by me and I typically started the design because I wanted to use it myself. But after that, why not let others benefit from it as well! Normally I have made a prototype to verify that they actually work. Other components (semiconductors, etc) are bought directly from a manufacturer or reseller. These products are therefore brand new, unused, and in the condition in which they left the factory.