McIntosh's MC451 Dual Mono Power Amplifier is a vacuum tube and solid-state amplifier that uses McIntosh's Hybrid Drive technology.
NAD Electronics' M23 Hybrid Digital stereo power amplifier builds on Purifi Eigentakt amplification technology
NAD's C 298 two-channel amp uses Purifi Eigentakt amplication technology, manufactured by NAD under license from Purifi.
NAD Electronics' Masters M28 seven-channel amplifier is the first multi-channel amplifier to use Purifi's Eigentakt self-clocking amplifier technology.