I would put linear power supply on the router first because that is part of your internal network and chains together things like music server, player, DAC, etc. The modem would just be another piece on the internet interface. You can't put linear power supply on every single piece of the internet, lol. The modem is also an additional step away from the Lumin, so anything in between would help filter noise.
Linear Power Supply Question
My router and modem are both powered by separate "wall wart" switching power supplies. Neither is plugged into the power conditioner but are on a separate line. If you were to choose which device to LPS first, what would that be and why? I ethernet cable connect my router direct to my Lumin T2. I'm assuming adding a LPS will drop the noise floor. Thanks to all who respond.