I would suspect cables (power, ICs, speaker), DAC or speakers.
What cables are you using?
Ah, right on the money. In preparation for the arrival of the n200 tomorrow, I received a 2m Wireworld Silver Starlight 8 spdif. The larger chassis of the Aurender will need a new home a bit further from the Pass. Got the mini hooked up and right out of the box it’s a revelation over the Nordost Heimdall 2 AES. The top is controlled, gorgeous mids, tighter bass. The overall presentation is impressive. Now for the n200!