Actually, Rowland produces a mix of class A/B and class D power amplifiers. Its monoblock M735 flagship, as well as the M625 S2 stereo amp, both run in class A/B.
See for example the M735 page at:
https://www.jeffrowlandgroup.com/model-735/
The only Rowland power amplifier product in production that operates in class D is the entry level M125 bridgeable.
Conversely, both of its integrated amp offerings, Continuum S2 and Daemon, feature class D power amplification subsystems.
Regards, Guido
See for example the M735 page at:
https://www.jeffrowlandgroup.com/model-735/
The only Rowland power amplifier product in production that operates in class D is the entry level M125 bridgeable.
Conversely, both of its integrated amp offerings, Continuum S2 and Daemon, feature class D power amplification subsystems.
Regards, Guido