Teenage Engineering, a renowned tech company, might be venturing into the realm of instrument amplifiers, as suggested by an FCC filing leak of an unannounced device named KO-Amp 35. The leaked gadget appears to be part of the company's mid-range EP family instruments, which currently includes the KO-II, Riddim, and the Medieval.
Teenage Engineering guitar amp concept
https://www.theverge.com/gadgets/913396/teenage-engineering-ko-amp-35-leak