iFi Audio’s power-focused brand SilentPower has updated one of its best-known accessories with the SilentPower AC iPurifier 2, a compact plug-in mains conditioner built to strip electrical noise out of a system before it ever reaches an amplifier or source. The pitch is simple: silence starts at the socket, and a cleaner mains supply means a lower noise floor everywhere downstream.
How the SilentPower AC iPurifier 2 Cleans Mains Power
At the heart of the SilentPower AC iPurifier 2 is the brand’s latest Active Noise Cancellation III circuitry, a technology iFi describes as inspired by military radar: it measures EMI/RFI riding on the power line and generates an inverted signal to cancel it out. Paired with improved circuitry and upgraded capacitors over the previous generation, the result is a claimed noise reduction of more than 40dB — over 100 times — compared with standard filtering methods, delivered while running in a parallel configuration so it adds no series impedance and has no detrimental effect on system dynamics.
The SilentPower AC iPurifier 2 doubles as a diagnostic tool rather than just a passive filter. Built-in polarity and earth diagnostic LEDs confirm when a mains circuit is wired correctly, or quickly flag polarity and earthing issues that would otherwise take a multimeter to find. A 4mm port also provides a supplementary earth connection when paired with SilentPower’s Groundhog+ kit, aimed at systems that hum or buzz until a component is touched — a classic symptom of a poor earth.
Surge Protection Built Into the SilentPower AC iPurifier 2
Beyond noise reduction, the SilentPower AC iPurifier 2 packs built-in surge protection rated to withstand spikes of up to 22,000 amps at 1,000 volts (8/20μS), absorbing sudden surges at the source before they reach the components behind it. Combined with the noise-cancelling circuitry, that puts cleanup and protection in the same small plug-in housing rather than splitting them across separate boxes — useful for systems where isolating noise from the electrical or network side has become as important as the components generating the sound itself.
The SilentPower AC iPurifier 2 ships in a compact, plug-and-play form factor — 127 x 40 x 40mm for the US version, 137 x 40 x 40mm for the EU version — and covers a wide 90-265V AC operating range, making it usable across most mains standards without a separate model per region.
Pricing and availability
The SilentPower AC iPurifier 2 is available now via SilentPower’s own site and select dealers, priced at €129.95.
Key specifications
- Active Noise Cancellation III: reduces mains noise by more than 40dB (100x)
- Surge protection: up to 22,000A at 1,000V (8/20μS)
- Polarity and earth diagnostic LEDs
- 4mm supplementary earth port (pairs with the Groundhog+ kit)
- Operating voltage: 90-265V AC
- Size/weight: 127 x 40 x 40mm, 127g (US); 137 x 40 x 40mm, 150g (EU)
- Warranty: 12 months
- Price: €129.95
