What amps are out there that are Class A, 50 wpc into 8 ohms?

Any version of the Aragon Palladium mono blocks will exceed 100 watts Class A power. The newer Iridium mono does not have a class A rating, but idle draw is 120 watts per mono block. It is probably safe to say that it is over 50 watts of Class A power.

It is probably safe to say that it is over 50 watts of Class A power.

😁 What is safe to say is that it draws 120 Watts at idle.

This is a sort of 'who cares' thing since the point at which the amp goes from class A to AB isn't important; the amp is a class AB amp regardless. What is important is how well distortion is managed by the heavy bias (that's the reason for class A in the first place).

Vitus MP-S201 stereo amplifier delivers 25wpc in class A into 8ohms, or 50wpc class A into 4 ohms.  It can also run in class AB for 500wpc, 1000wpc. Class A or AB mode is user selectable.  We have one here at our shop.  It is a Beast! More importantly it sounds amazing - 

For about 15 years I had 3 Class A Amps.Two modified Threshold T-50's that were originally owned by a former Threshold employee. The amps were modified at Threshold to work as 90 wpc mono blocks. Also a classic Forte 4A 50 wpc amp. If you can find one on line pick it up. Always regretted selling that amp.

Old Sumo Nine, Pure Class A to all impedance loads. 60 watts to 8 and 120 to 4.