@glennewdick -
I disagree with your assessment about Rowland’s amps and comparing them to the numerous brands that simply take an existing Class D module with its stock SMPS and stick it in a cheap chassis. JR designs and builds his own proprietary SMPS which are actually very expensive to implement correctly and then integrates those power supplies with various Class D output stages which he selects for their sonic performance. His SMPS outperforms most linear power supplies and avoid creating the AC line noise which lesser designs inject on the power line. His chassis construction is exceptional, with most models having aluminum billet chassis which are expertly machined and masterfully finished.
Granted his amps are not inexpensive, but their level of engineering and build quality are exceptional as is their sonic performance. Quality of that level comes at a price... of course there are cheaper implementations of Class D amps which are quite popular but are not competitive with the performance of the Rowlands despite some circuit similarities. There is a market for both types of products, more value oriented amps and cost no object designs for more demanding audiophiles.
I disagree with your assessment about Rowland’s amps and comparing them to the numerous brands that simply take an existing Class D module with its stock SMPS and stick it in a cheap chassis. JR designs and builds his own proprietary SMPS which are actually very expensive to implement correctly and then integrates those power supplies with various Class D output stages which he selects for their sonic performance. His SMPS outperforms most linear power supplies and avoid creating the AC line noise which lesser designs inject on the power line. His chassis construction is exceptional, with most models having aluminum billet chassis which are expertly machined and masterfully finished.
Granted his amps are not inexpensive, but their level of engineering and build quality are exceptional as is their sonic performance. Quality of that level comes at a price... of course there are cheaper implementations of Class D amps which are quite popular but are not competitive with the performance of the Rowlands despite some circuit similarities. There is a market for both types of products, more value oriented amps and cost no object designs for more demanding audiophiles.