ILP HCA40 - Class A module info

I found 4 x "NOS" ILP HCA40 modules.

HCA40 data

Anybody know what they sound like / got experience with them?

Extract from the datasheet:
"The ILP HCA40 audio amplifier module offers the ultimate in high fidelity performance.
The unit, which is strongly biased into class A, exhibits audible smoothness and clarity and has been designed for the ultra high definition perfromance associated with class A operation."

Don't have a PSU at moment to test myself, but sounds interesting.