Before you are going "Klinkenputzen" you better become a Tonmeister VDT
or at least find some Tonmeister VDT who likes to go "Klinkenputzen"
with you. From a technical POV it's easy to do, the ethical POV is
something else. You also should be willing to lend all the people
you try to sell your product, the product for around a month and
expect that you get it back in a broken and unrepairable state. This at
least is common practise to sell audio and video studio hardware in
Germany, for small companies and huge companies there's no difference.
You need to be willing to compete with the big companies and spend much
money to do this. The German studio market is a shark tank. Don't
expect that anybody is interested in "new ideas" on this market, if you
have nothing to provide. You need much knowledge and much money to
start here. Better ask for a marketing expert instead of a hardware
technician and ensure that your hardware already provides all the
needed EU certifications. In Germany you need to provide radio
interference suppression certifies and things like this.