IsoTek V5 Sigmas Mains Conditioner (7-Way)

The IsoTek V5 Sigmas is a mains conditioner with seven individually filtered outlets – three in high-current (16 A) and four in medium-current (10 A) configuration.

Sigmas is the all-rounder at the top: it combines the high-current strength of the Titan with four filtered medium-current outlets for sources – the whole system at a single, cleanly separated power hub. Seven outlets, seven dedicated cleaning networks.

Why the V5 Sigmas?

The three high-current outlets use a leaner version of the Titan's Direct-Coupled circuit and deliver up to 16 A for power amps, active loudspeakers, subwoofers and modern TVs. The four medium-current outlets work with IsoTek's Adaptive Gating, which adapts filtering to the source's actual current draw. KERP ensures equal current delivery at every outlet, the OCC copper wiring is silver-plated, and protection kicks in tiered up to 121,500 A. Bottom line: up to 80 dB less mains noise for an entire chain.

What you hear

The effect of a Titan on the power amps and a source conditioner on everything else – at the same time. The background turns pitch-black, the soundstage becomes large and stable, while dynamics remain fully intact. A complete system pulls together as one, instead of every component fighting for itself.

Who is the V5 Sigmas for? (and who it's not for — straight talk)

The right choice when a complete, upmarket chain is to be powered from one chassis – power amp plus sources, HiFi plus AV. Straight talk: if you only run two or three components, you won't get your money's worth – an Aquarius or Elektra is plenty here. And if you need only high current, the focused Titan is the cheaper route. The Sigmas pays off when you actually use the full breadth – a powerful power amp and several sources.

Our verdict

The V5 Sigmas is the complete conditioner for the large system: Titan-grade high current for the power amps, four sensitive medium-current outlets for the sources, all in one chassis. If you want a complete high-end chain on one clean power hub, this is exactly right. The trade press agrees: the V5 Sigmas carries the hi-fi+ Editor's Choice Award 2026.

Technical data

• Type: mains conditioner, 7 outlets + System Link
• Outlets: 3× high current (16 A, Direct-Coupled) + 4× medium current (10 A, Adaptive Gating)
• Mains input: 16 A IEC C20
• Mains voltage: 100–240 V / 50–60 Hz
• Max. power, high current: 3,680 W (16 A / 230 V)
• Surge protection: 121,500 A (tiered)
• Noise suppression: up to 80 dB
• Filter principle: 7 separate networks, KERP
• Internal wiring: OCC copper (solid core), silver-plated, FEP dielectric
• Dimensions (W × H × D): 445 × 150 × 305 mm
• Weight: 15.0 kg
• Warranty: 2 years, extendable to 3 years with registration
• Included: EVO3 Premier mains cable, 1.5 m

Frequently asked questions

What's the difference between the IsoTek V5 Sigmas and Titan?

The Titan is a pure high-current specialist with three 16 A outlets. The Sigmas additionally has four medium-current outlets for sources and powers a complete chain from one unit. Power amp plus sources → Sigmas; power-amp performance only → Titan.

Which system is the V5 Sigmas worth it for?

For a complete, upmarket chain with a powerful power amp and several sources that should be powered from one unit. With just two or three components, an Aquarius or Elektra is enough; if you need only high current, the Titan is the cheaper route.

Why buy the IsoTek V5 Sigmas at HD Zürisee?

Because a conditioner in this class has to fit the system. HD Zürisee in Wädenswil tells you honestly whether Sigmas, Titan or Aquarius is right, supplies as an authorized IsoTek dealer with its own technician, and installs on-site on request.

Goes well with

You'll find mains cables and connectors in the Cables & Connectors category, and the rest of the IsoTek range in the IsoTek overview.