Probably the biggest upgrade without changing the whole system?
SYMETRICA   by  Z:Axis Audio
Because life should be balanced..
Early Review of a pre production version here

PRODUCT DESCRIPTION:
Symetrica is a 3 section ‘balanced’ or ‘symmetrical’ output power supply for high end domestic audio system use. It features a single mains supply input via a Neutrik 32amp Powercon locking connection, with a very low electrical impedance power cable supplied also using a Furutech 1363G (gold plated alpha pure copper) mains plug (UK).

PRIMARY FEATURES:

• 2 stage start operation, for inrush current control.
• Primary input fuse 12 amp slow blow 32 x 6.35mm Eaton Bussman non resonant ceramic fuse.
• Inrush current limiting device. (MOV)
• Substantial DC filter section; features 16,500uf Vishay anti parallel capacitors (33K uf each) and 35amp parallel bypass/overload Vishay bridge rectifier.
• Incoming Voltage display, switchable to indicate voltage output of the secondary
stages.
• 3 custom specified and built isolating balanced output transformers to provide the
following:
• 1 x 300Va circuit transformer for all digital equipment feeding 3 of the output sockets. Maximum current of 1.1amps (at 240v).
• 1 x 300Va circuit transformer for all analogue source equipment, i.e. Pre Amplifier, Phono Amplifier, tuner, turntable etc, feeding 2-3 of the output sockets. Maximum current of 1.1 amps (at 240v).
• 1 x 1.5 – 3kVa circuit transformer for all gain (amplifier) sections, i.e. power
amplifiers, powered loudspeakers, subwoofers etc.
Maximum current 6.8 amps for the 1.5Kva or 13 amps for the 3Kva. (at 240v).
• Pre Amplifiers & Phono amplifiers will benefit being fed from the 2nd 300va transformer (sockets 4&5, or 6 depending on configuration specified at point of order).
• 3 x Current output display’s in red, one for each output section / transformer circuit.
• Voltage and current displays are able to be switched off via a high quality top mounted push button switch.
• All internal circuit boards are made from2mm & 4mm Tufnol 
• 10 x Furutech gold plated UK 3 pin outlet sockets, both socket’s live pin’s are fused
with either 6 amp or 3 amp Eaton Bussman 32mm x 6.35 slow blow non resonant fuses depending on usage. These sockets are by far the best available with excellent physical grip of the mains plug.
• Solid copper low impedance earth bus bar connecting all earth points to the single
entry point.
• All internal wiring from high quality pure copper wire 
• Non magnetic casework from composite material, glass, acrylic and anodised aluminium.
• 4mm thick Aluminium laser cut rear panel for strength.
• Anodised Aluminium side fins for heat dissipation.
•  Tinted acrylic top cover panel.
• 6mm Dark grey glass front faceplate.
• Dimensions; 530mm x 380mm x 170mm high.
• Weight: 29kg
• Idle current usage >100mA.
• Heat dissipation – Low.

Models:

There are currently 3 options available, all of which share the same internal construction and transformers/ filter etc. Please see below for more information:

Symetrica ‘Nocturne’ – This version is without the front panel displays for voltage and current, a small blue LED is all that is visible from the front. 

Symetrica ‘Standard’ – This version includes the front panel displays for voltage and current. Output sockets are Furutech Gold Plated.

Symetrica SE (Special Edition) – The top level version includes the new Furutech NCF output sockets and offers a custom metallic colour option for the casework. This version provides a bit more air and space to the recording.

Prices:

Symetrica Nocturne – £7,990.00

Symetrica Standard £ 8, 995.00

Symetrica SE £ 9,795.00

Symetrica ‘Nocturne’
Furutech Outlets on all models, NCF used on the SE version
Symetrica SE (Special Edition) in Custom grey metallic
2021 Symetrica SE in Copper finish under construction