Is it possible that the un-attenuated signal from the Weiss was too much for your amplifier?
No, the amp has sufficient input headroom, and has no difficulty with the similarly high output of my phono stage.
I am now trying a Fidelizer Nikola II power supply with my Weiss 205, in place of the Teddy Pardo power supply. The Nikola II is about twice the price of the Teddy power supply and is a noticeable improvement in terms of image size, colour and smoothness. The Teddy Pardo PSU is perhaps a little faster sounding, and is still a very good PSU for the price.