Older PURE CLASS-A Amplifiers


I am looking at some older Pure Class A amps and am curious as to are they as good as some newer amps like the Pass X150, and which ones are recommended, and have they been compared to each other anywhere? Thanks much for the recommendations.

I am considering the following PURE CLASS A amps:
Threshold T-50
Monarchy Audio SM-100 Monos
Monarchy Audio SM-70
Forte Model 4
tpk123
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I am looking to drive Platinum Reference 1 monitors, similar to the Solos. They are very power hungy, so I guess I would need at minimum 50 watts. I liked the Monarchy cause it looks like they double down with each increasing ohms load.
I second Ramy here (Gryphon DM100), the only caveat would be the intensive wear that class-a design brings to output transistors, Is there any technical trad-off in that?

Regards,

Fernando
Why not go with a pair of Monarchy SE-100 Delux's. They are an improvement over the Sm70's and they fit in your budget. Also, they run cooler than the SM70's. There's a pair for sale here for $989. Why not make an offer.

Later,