Switching power supply plugged into Power Plant 12

I have a Power Plant 12 for my speaker system. I want to take more advantage of it, and wondering if I should plug my headphone amp/DAC into it, which I use for watching movies/TV on the computer about 15 feet away. My main concern is whether its switching power supply will “contaminate” the speaker system. (Everything else have linear power supplies.)

The headphone amp/DAC is Burson Conductor 3 Reference (https://www.bursonaudio.com/products/conductor-3/) with a Super Charger power supply (https://www.bursonaudio.com/products/super-charger-3a/).

I would have to use an extension cord, so the connection would be:
PP12 → 16awg 10ft extension cord → Super Charger → Burson Conductor 3 Reference.