Guido,
I think I should limit by internal sleuthing of class D amplifiers' internal power modules lest I convict the innocent and acquit the guilty.
After a second look, it seems the Pascal SPRO-2 power board (250w@8ohms,500w@4ohms and bridgeable to 1,000w)was released in Feb of 2013. The JRDG 525 stereo amp (250w@8ohms,500w@4ohms and bridgeable to 1,000w) was released/announced at CES in March of 2013. I would think that Pascal, being the OEM for Rowland, had sufficient time to supply Rowland with enough of these new modules to begin production. I was unable to visually compare internal photos of the 525 amp components to photos of the Pascal SPRO-2 stereo power boards, however, it seems reasonable to conclude that the Rowland 525 stereo amp utilizes the Pascal SPRO-2 module based on the products' release dates and identical power ratings.
I did not find any info suggesting the 525 uses the Pascal older XPRO-2 modules.
I'm having a hard time, however, finding published reviews on either the 525's or the Pascal module's sonic characteristics.
Kuribo,
While sq is my primary criteria in choosing a new amp, I'm not immune from the ascetics of a component, especially when it will be prominently visible in my rack whenever I'm listening to music or using my ht. I realize I will pay a premium for this benefit but it will not be excessive with the Alumanati amp build (about $2,000 for the same Pascal amp module, and similar anodized aluminum casework, as the JRDG 525 amp currently priced at approx. $5,000). It seems like a bargain to me, even though I realize I won't be getting the exact same value added internal components, technology or sq as the Rowland.
Macrojack,
I agree with you about the desirability of the Rowland 525 itself over an Aluminati amp build. I don't think doubling my budget is currently feasible but I think a used or demo 525 at a reduced price will be added as my option#5. I'm not overly optimistic about finding one, though, and certainly will not be holding my breath.
Thanks for the assistance all,
Tim