Audio T Verdict
The IsoTek V5 Sirius is a substantial six-way mains power-cleaning bar designed for complete hi-fi, home cinema and network-based systems, including equipment with relatively high power demands.
Its six UK sockets share a 16A or 3,680W capacity, making Sirius more suitable for larger amplifiers, active speakers and powered subwoofers than IsoTek’s 10A Polaris and Corvus power bars.
Every outlet connects independently to the central power-cleaning circuit, helping prevent electrical noise produced by one component from passing directly into the products connected beside it.
A high-current choke network, high-frequency delta filtering and IsoTek’s KERP architecture are designed to reduce Common Mode and Differential Mode mains noise while maintaining a low-resistance power path.
With 54,000A surge protection, an easy-reset circuit breaker, System Link expansion and a 1.5m EVO3 Premier power cable included, the V5 Sirius provides a practical whole-system upgrade without requiring a full-width mains conditioner.
IsoTek V5 Sirius Six-Way Mains Power Bar
The IsoTek V5 Sirius combines six-way mains distribution, power cleaning and equipment protection within a slim aluminium power bar.
It is designed for systems that require more current than the 10A V5 Polaris or V5 Corvus can provide, while retaining the convenience of a compact power bar that can sit behind an equipment rack or be mounted to a suitable wall or cabinet.
All six outlets receive power through IsoTek’s central cleaning network and share a maximum UK capacity of 16A or 3,680W at 230V.
This Product Is the V5 Sirius
The previous Audio T product title incorrectly identified this model as the V5 Corvus.
The six-outlet design, 16A rating, 555mm chassis, EVO3 Premier cable and selectable Black or Silver finishes all correspond to the IsoTek V5 Sirius.
Six Independent Power Outlets
Many conventional extension blocks connect their sockets in a simple chain, with one outlet electrically following another.
This can allow Differential Mode noise produced by a connected component to pass more readily through the block and into neighbouring equipment.
Each Sirius socket instead connects independently to the central power-cleaning circuit, helping reduce cross-contamination between the six connected products.
Suitable for Complete Audio and AV Systems
The 16A rating allows Sirius to support a broad selection of source, control and amplification products within one installation.
A typical system might include a streamer, DAC, CD player, turntable power supply, integrated amplifier and powered subwoofer.
It may also be used for compatible televisions, projectors, home cinema processors, receivers, network switches and music servers.
Typical Connected Equipment
- Network streamers and music servers
- CD and SACD players
- DACs and digital processors
- Preamplifiers and phono stages
- Integrated and power amplifiers
- Active loudspeakers
- Powered subwoofers
- Televisions and home cinema equipment
16A or 3,680W Total Capacity
The six sockets share a maximum total load of 16A or 3,680W at 230V.
This capacity is available across the complete power bar rather than from every socket individually.
Add together the published mains consumption of all connected equipment and keep the combined result below the Sirius rating.
Use the Mains Consumption Figure
Do not use an amplifier’s quoted watts-per-channel output when calculating the connected load.
Refer to the rear-panel electrical rating or the manufacturer’s published mains power consumption.
Designed for High-Current Equipment
Large amplifiers and powered subwoofers can place rapidly changing demands on their electrical supply.
Sirius uses a high-amperage choke system and low-resistance internal construction designed to clean the incoming power without deliberately restricting the current available within its rated capacity.
This makes it a more appropriate IsoTek power-bar option where a system includes demanding amplification or several powered components.
Common Mode Mains Noise
Common Mode noise appears in relation to earth and often includes radio-frequency interference from wireless communications and nearby electrical devices.
Wi-Fi routers, computers, televisions, chargers, smartphones and switched-mode power supplies all contribute to the modern electrical environment.
The Sirius filtering network is designed to reduce this unwanted high-frequency energy before it reaches the connected equipment.
Differential Mode Mains Noise
Differential Mode noise appears between live and neutral and can be generated by the power supplies inside the components connected to the power bar.
Digital electronics and switch-mode supplies may return high-frequency noise to the circuit even when the incoming household supply is relatively clean.
Sirius combines central filtering with independently connected sockets to address both incoming noise and contamination produced within the system itself.
Wide-Band Mains Filtering
IsoTek publishes mains noise reduction figures of approximately 23dB at 10kHz, 40dB at 100kHz and 60dB at 1MHz under its stated reference conditions.
This broad filtering range is produced by a high-power shunt network, high-amperage choke system and high-frequency delta filters.
The overall product specification also quotes radio-frequency interference reduction of up to 45dB as a general comparative figure.
Inductive Resonance Gate
IsoTek’s Inductive Resonance Gate technology is used to increase electrical isolation between the six output sockets.
It works alongside the independently connected outlet arrangement to reduce the opportunity for mains noise generated by one component to reach another.
The result is a more considered internal architecture than a conventional multi-way extension block.
KERP Equal-Resistance Power Distribution
KERP stands for Kirchhoff’s Equal Resistance Path.
IsoTek uses this architecture to provide an equal-resistance power path from the central circuit to each of the six outlets.
This is intended to give every connected product a consistent electrical connection rather than allowing the final socket to depend on a chain of connections serving the preceding outlets.
Fully Star-Earthed Network
The protective-earth connections reference a central point within Sirius rather than being passed sequentially between sockets.
This star-earth arrangement helps provide a consistent earth reference for all six connected components.
Sirius is a Class I electrical product and must be connected to a correctly installed mains socket with protective earth.
Silver-Plated 6N Copper Wiring
The internal wiring uses multi-strand 6N oxygen-free copper, representing a stated purity of 99.9999%.
The copper strands are silver plated to provide a highly conductive outer surface while retaining the flexibility of a multi-strand internal cable.
The wiring is designed to combine low resistance with the high-current capacity required by the 16A circuit.
FEP Dielectric
The internal conductors are insulated using Fluorinated Ethylene Propylene, normally abbreviated to FEP.
FEP provides stable electrical insulation with a relatively low dielectric constant compared with materials used in many ordinary power products.
Similar materials are used within several IsoTek power cables, helping maintain a consistent approach throughout the power connection.
54,000A Surge Protection
Sirius includes an IsoTek protection network rated at 54,000A for instantaneous surge and spike protection.
The circuit uses a sequential arrangement designed to respond progressively according to the severity of the incoming disturbance.
This can help protect the power bar and suitably connected equipment, although no protection system can guarantee survival from every supply fault or a direct lightning strike.
Protection Has Practical Limits
Disconnect sensitive equipment during severe electrical storms where it is practical and safe to do so.
Surge protection should not be treated as an absolute guarantee against lightning or major faults in the household supply.
Easy-Reset Circuit Protection
The V5 Sirius uses an accessible resettable 16A protection system rather than relying on a small conventional glass fuse within the power bar.
IsoTek highlights the larger electrical contact area provided by this arrangement.
If the protection trips, switch off and disconnect the connected equipment before checking the combined load and investigating any possible fault.
Do Not Repeatedly Reset a Tripping Unit
Repeated operation of the protection may indicate an overloaded power bar, faulty component or electrical problem.
Disconnect the connected equipment and seek suitable technical advice if the cause is not clear.
System Link Expansion
A dedicated System Link outlet allows another compatible IsoTek product to be connected without using an additional wall socket.
The connection also maintains a common star-earth reference across the linked products.
Suitable System Link cables are available in different IsoTek cable ranges and should be selected according to the additional product’s connection.
System Link Does Not Add More Power
Connecting another IsoTek product does not increase the 16A or 3,680W capacity available from the household supply.
The total load of the Sirius, linked unit and every connected component must remain within the ratings of the complete electrical circuit.
16A IEC C20 Mains Inlet
The V5 Sirius uses a 16A IEC C20 mains inlet rather than the smaller C14 inlet found on IsoTek’s 10A power bars.
This requires an incoming power cable fitted with a matching IEC C19 equipment connector.
The larger connection supports the Sirius’ higher-current electrical rating and should never be replaced with an unsuitable adaptor.
EVO3 Premier Power Cable Included
A 1.5m IsoTek EVO3 Premier power cable is supplied for connecting the Sirius to the mains.
The Premier uses silver-plated high-purity copper conductors, FEP insulation and factory-fitted connections.
The cable should reach the wall socket without tension, sharp bends or a tightly wound coil of unused cable.
Black or Silver Finish
The V5 Sirius is available from Audio T in Black or Silver.
Its extruded aluminium enclosure provides a strong outer structure while allowing the power bar to sit discreetly behind an equipment rack.
The unit measures 88mm wide, 55mm high and 555mm long, with a weight of approximately 2kg.
Wall-Mounting Bracket Included
A mounting bracket kit is supplied for installations where the Sirius needs to be fitted behind furniture or an equipment rack.
The mounting surface and fixings must be suitable for the power bar’s weight and the additional pull created by six connected power cables.
Keep the mains inlet, reset mechanism and output sockets accessible for inspection and disconnection.
A Power Cleaner, Not a Regenerator
V5 Sirius passively filters and distributes the incoming mains supply.
It does not create a new mains waveform, regulate the incoming voltage or regenerate the electrical supply.
Customers requiring mains regeneration should consider a suitable IsoTek Genesis product.
DC Blocking Is Not Included
Sirius does not remove direct-current offset from the incoming AC supply.
Where a transformer produces persistent mechanical hum or vibration because of DC contamination, a suitable IsoTek Syncro Uni may be installed ahead of the power bar.
The DC blocker must provide sufficient current capacity for the complete system.
Installation Guide
- Calculate the total mains consumption of the complete system
- Keep the connected load below 16A or 3,680W
- Position Sirius on a stable surface or install the mounting bracket
- Keep the reset control and connections accessible
- Switch off and disconnect all equipment
- Connect the supplied EVO3 Premier cable to the IEC C20 inlet
- Connect each component to one of the six outlets
- Arrange the plugs so they do not obstruct neighbouring sockets
- Avoid sharp cable bends and excessive tension
- Connect Sirius to a correctly earthed wall socket
- Switch on Sirius before the connected equipment
- Recheck the total load whenever the system changes
What Might You Hear?
Reducing mains noise and electrical interaction between components may help a suitably revealing system reproduce low-level musical information more clearly.
Depending on the equipment and incoming supply, possible improvements can include cleaner bass definition, greater separation, a quieter perceived background and more stable stereo imaging.
The scale of any change will depend on the mains supply, connected equipment, existing power arrangement and resolution of the complete system.
V5 Sirius or V5 Polaris?
Choose V5 Sirius When
- 16A or 3,680W capacity is required
- Large amplifiers or subwoofers are connected
- Stronger wide-band filtering is preferred
- A C20 high-current inlet is suitable
- The system justifies the higher specification
Choose V5 Polaris When
- 10A or 2,300W is sufficient
- Six outlets are still required
- The system mainly uses modest components
- A smaller budget is available
- A C14 inlet and Initium cable are suitable
The IsoTek V5 Polaris provides six independently connected outlets with a lower 10A maximum capacity.
V5 Sirius or V5 Corvus?
Choose V5 Sirius When
- Higher current handling is the priority
- Six outlets provide enough connections
- The system includes demanding amplification
- 54,000A protection is preferred
- A 555mm linear power bar fits the installation
Choose V5 Corvus When
- Nine outlets are more important than maximum current
- The complete system remains within 10A
- Several source and network components need power
- A shorter, wider power bar fits more easily
- A lower purchase price is preferred
The IsoTek V5 Corvus provides nine sockets but has a lower 10A or 2,300W total capacity.
Related IsoTek Products and Audio T Guides
Key Features
- Six-way mains power-cleaning bar
- Six independently connected UK outlets
- 16A maximum UK current
- 3,680W total capacity at 230V
- Central Common Mode filtering
- Central Differential Mode filtering
- Designed to reduce outlet cross-contamination
- RFI reduction up to 45dB
- Wide-band high-current choke network
- High-frequency delta filtering
- Inductive Resonance Gate technology
- KERP equal-resistance power distribution
- Fully star-earthed network
- Multi-strand 6N oxygen-free copper wiring
- Silver-plated internal conductors
- FEP conductor dielectric
- 54,000A surge and spike protection
- Easy-reset circuit protection
- System Link expansion connection
- 16A IEC C20 mains inlet
- 1.5m EVO3 Premier cable supplied
- Wall-mounting bracket kit included
- Black or Silver finish
- Slim extruded aluminium enclosure
Frequently Asked Questions
Is this product the V5 Sirius or V5 Corvus?
It is the six-outlet, 16A IsoTek V5 Sirius. The earlier Audio T product title incorrectly identified it as Corvus.
How many outlets does the V5 Sirius provide?
It provides six independently connected mains outlets plus one System Link connection.
What is the maximum UK current?
The maximum current is 16A across the complete power bar.
What is the maximum wattage?
The six sockets share a maximum total capacity of 3,680W at 230V.
Does every outlet provide 3,680W?
No. The 3,680W rating is shared across all six outlets and any connected System Link products.
Can I connect a large power amplifier?
Yes, provided the combined consumption of the complete system remains within the 16A rating.
Can I connect a powered subwoofer?
Yes, provided its consumption and the total system load remain within the published capacity.
Does Sirius provide surge protection?
Yes. IsoTek specifies instantaneous surge and spike protection of 54,000A.
What is the published RFI reduction?
IsoTek quotes RFI reduction of up to 45dB, with more detailed frequency-specific filtering figures also published.
What is System Link?
System Link allows another compatible IsoTek product to be connected while maintaining a common star-earth reference.
Does System Link increase the available power?
No. The Sirius, linked products and all connected equipment remain part of the same 16A supply.
Does Sirius block DC from the mains?
No. A compatible IsoTek Syncro Uni is required where DC offset is causing transformer hum or vibration.
Does it regenerate the mains waveform?
No. Sirius is a passive power-cleaning and distribution product rather than a mains regenerator.
Which power cable is included?
A 1.5m IsoTek EVO3 Premier power cable suitable for the Sirius’ IEC C20 inlet is supplied.
Can the V5 Sirius be wall mounted?
Yes. A suitable mounting bracket kit is included.
What are its dimensions?
It measures 88mm wide, 55mm high and 555mm long, with a weight of approximately 2kg.
Why Buy From Audio T?
- Specialist IsoTek demonstrations
- Complete system power-consumption checks
- Sirius, Polaris and Corvus comparisons
- Amplifier and subwoofer compatibility guidance
- System Link expansion advice
- Power-cable upgrade recommendations
- Wall-mounting and installation guidance
- Home demonstrations where available
- Ongoing system and setup support
Contact your local Audio T store to confirm whether the 16A V5 Sirius provides the correct capacity and outlet arrangement for your system.