As part of improving power to my system and after installing a separate spur I came across two products to improve the separate fuse (junction) box for the spur:
Akiko Audio cylindrical fuse unit: a Siemens design with silver treated contacts, silver coated rod for Neutral and a ceramic fuse containing an Akiko Fuse Tuning Chip. This unit is best installed by a qualified electrician lest you know what you are doing around live mains. It has a major impact on lowering the noise floor, detail retrieval and impulse speed
Akiko Audio Fuse box Pro: attaches to the fuse box’ ground connection and removes hash from the system and substantially improves bass performance. Easily installed and one of the better value for money tweaks out there.
I cannot overemphasize the importance of optimum mains treatment. In big cities the amount of mains borne noise keeps increasing with the number of digital devices connected.
I have no association with the company, just a happy customer.