Tested on my EMT first, thru the Denon AU-300LC > VSPS phono > headphone amp > Beyer DT880. Then repeat and rinse on the PLC-590.
Via the headphones, it definitely sounded ok. The SPU could do with more gain on the Denon AU-300LC though.
Turns out that my T-amp, which is running on 12V SLA, needs recharging. I tested this again thru the T-amp with a fully charged SLA and everything’s ok.