I wonder is my $120 balanced amplifier truly balanced! Makes a T50RP rattle like no other! https://www.aliexpress.com/item/33040446809.html?spm=a2g0s.8937460.0.0.7bcb2e0ebcaVRr
It definitely looks balanced to me, with 2 x TPA6120A2 output buffers, so I think it's fully balanced. By rattle you really mean rattle, like diaphragm rattle? If so, then feel free to RMA your T50RP...it's probably the mk3 that has rattling drivers (Q&A issues).