Arcam irDAC humming noise

A big hi to all,

My gear -

Sources Used - BDP via Coax, Set-top box via Optical, Computer via Coax

DAC - ARCAM irDAC

Amplification - Naim 5i2

Speakers - B&W 683

The reason why I started this post is, Ive read a lot of posts regarding the HUM noises when the DAC is connected to the amp, I lived with this problem for more than a year and yesterday it suddenly struck me why not add a ferrite bead near the DAC power supplies bead. And once I added it, the hum disappeared, I wanted to share this info with people who've had this problem. Unfortunately all those topics cannot add more replies, hence this new post.

Hope this helps people having issues with their ARCAM irDAC

Regards,

Kannan