IsoTek Evo 3 Sigma Power Conditioner

The IsoTek EVO3 Sigmas is a high-performance mains power conditioner designed to deliver cleaner, lower-noise AC power to high-end audio and home theatre systems. Positioned above the EVO3 Aquarius in IsoTek’s range, the Sigmas combines multiple independent filtration stages with dedicated high-current outputs, making it suitable for both delicate source components and demanding power amplifiers.

Engineered as effectively six independent power conditioners in one chassis, the EVO3 Sigmas isolates each outlet individually to minimise cross-contamination between connected components. This approach reduces both Common Mode and Differential Mode mains noise, improving overall system performance by lowering the noise floor and increasing dynamic contrast.

A major advantage of the Sigmas over many conventional conditioners is its inclusion of IsoTek’s Direct-Coupled© circuit technology on its two high-current outlets, specifically designed to maintain unrestricted current flow for power amplifiers, subwoofers, and active loudspeakers without limiting transient response.

Specifications

Power Conditioning Architecture

• 6 independent power-cleaning circuits
• Removes Common Mode and Differential Mode noise
• RFI reduction: 75dB
• KERP© (Kirchhoff’s Equal Resistance Path) technology
• Adaptive Gating© auto-load sensing
• Fully star-earthed internal network

Outlet Configuration

Medium Current Outlets

• 4 × 10A outlets
• Total capacity:
  • 2300W @ 230V
  • 1150W @ 115V

Ideal for:

• CD players
• streamers
• DACs
• preamplifiers
• media servers

High Current Outlets

• 2 × 16A outlets
• Total capacity:
  • 3680W @ 230V
  • 1840W @ 115V

Ideal for:

• power amplifiers
• active loudspeakers
• subwoofers

Protection & Construction

• Instantaneous surge protection: 108,000A
• Advanced multi-stage VDR protection array
• Solid-core silver-plated UP-OCC copper internal wiring
• FEP dielectric insulation
• Air dielectric construction
• Gold-plated 2oz copper PCB traces

Inputs & Connectivity

Power Input

• 1 × 16A IEC C20 mains inlet

Outputs

• 6 × IEC power outlets

Display

• Front-panel LED display showing:
  • Voltage
  • THD distortion
  • Off mode

Physical Specifications

• Dimensions (W × H × D):
  445 × 90 × 305 mm
• Weight:
  12 kg
• Included Cable:
  IsoTek EVO3 Premier C19 power cable

In practical systems, the EVO3 Sigmas is highly regarded for improving:

• lower background noise
• greater image focus
• improved bass articulation
• stronger dynamic contrast
• enhanced soundstage depth
• cleaner transient delivery

Unlike entry-level conditioners that can restrict amplifier current, the Sigmas was specifically designed to preserve dynamic authority while still delivering substantial filtration benefits.

Its strongest application is in full-system conditioning, where multiple source components and amplifiers can benefit from dedicated isolated outputs.

A serious high-end power conditioning solution combining advanced filtration, high-current delivery, and comprehensive surge protection for demanding reference audio systems.

Condition: Good

Colour: Black

Unit includes original packaging and accessories.