Hi OP.
The Luxman 590 is a seriously under-spec'd amp. It is really a 90 wpc amp, that Luxman underrates, I believe in large part due to the amp preconditioning rule. It's got the electronics of a 90 W amplifier, but not the heat sinks needed to pass the hour long preconditioning, which is completely unrealistic.
It is my belief that Luxman chose to rate the amp at 30 wpc in order to avoid changing the form factor but I have not confirmed this. See the measurements at the bottom.
More here:
https://www.stereophile.com/content/ftc-proposes-eliminating-its-amplifier-rule
and here:
https://onahighernote.com/oahn/wp-content/uploads/2016/05/REVIEW_160601_Hi-Fi-World_Luxman_L-590AXII...
The Luxman 590 is a seriously under-spec'd amp. It is really a 90 wpc amp, that Luxman underrates, I believe in large part due to the amp preconditioning rule. It's got the electronics of a 90 W amplifier, but not the heat sinks needed to pass the hour long preconditioning, which is completely unrealistic.
It is my belief that Luxman chose to rate the amp at 30 wpc in order to avoid changing the form factor but I have not confirmed this. See the measurements at the bottom.
More here:
https://www.stereophile.com/content/ftc-proposes-eliminating-its-amplifier-rule
and here:
https://onahighernote.com/oahn/wp-content/uploads/2016/05/REVIEW_160601_Hi-Fi-World_Luxman_L-590AXII...