Welcome!
And thanks for the link to the Altmann site, was thinking of them the other day and couldn't remember their name. Are they still in business? The core technology, while not well explained, seems well out of date and as quirky as ever. 10 wpc/8 ohms and SPDIF are quite limiting. Plus the prices I could find seem out of line for what you're getting. 20 some years ago was trying to warm up to tiny amps but couldn't find efficient speakers that suited me.