Rather than Amersfoort, how about Eindhoven as thats where NXP is based (who I believe are the current owners of the Empeg technology)

Empeg -> SonicBlue -> DNNA (D&M Holdings) -> SigmaTel -> Freescale -> NXP

Not sure on the transfer between D&M and SigmaTel - if it was licensing or outright purchase. If its only licensing then the owners are Sound United LLC (DEI Holdings), who bought D&M Holdings