iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch
    iFi Audio DC Blocker in Geneva | Digistore.ch

iFi Audio DC Blocker | DC blocker against transformer hum

69634
CHF139.00 Tax included
24‑hour delivery
iFi Audio DC Blocker, a DC blocker that fits on the IEC mains inlet of an amplifier. It stops the DC voltage on the mains from reaching the transformer and removes its mechanical hum.
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White unit plugged into the back of an audio component, black mains lead in the foreground

Transformer hum

Many large amplifiers give off a mechanical hum that you can hear with your ear close to the chassis. It comes from the toroidal transformer: a small DC voltage on the mains reaches it, saturates it and makes it vibrate. The more powerful the amplifier, the larger its toroidal transformer and the more sensitive it is to this residual DC voltage.

White adapter with a black female IEC socket, three-quarter view on a black background

ZERO DC Block technology

Fitted to the IEC mains inlet at the back of the amplifier, the DC Blocker stops the DC voltage before it gets in. Its ZERO DC Block technology blocks up to 1200 mV of incoming DC, with no DC passing through. The transformer then works in the intended conditions and the mechanical hum disappears.

DC Blocker lying on a slate surface, IEC connector visible

Safety and shielding retained

The shielding against electromagnetic interference is retained and the safety of the component is unaffected. iFi uses a glass passivated semiconductor with a dielectric strength of 1500 VRMS, UL listed. The socket, connector and case are made of UL94-V0 flame-resistant polymers, and the IEC connectors are hospital grade.

Male IEC side of the white unit on a black background

Electrical ratings

The DC Blocker works from 90 to 240 V, with a maximum current rating above 7 A and a continuous current rating of 4 A. It suits amplifiers up to 880 W or VA at 220 V, and 440 W or VA at 110 V. At 68 x 37 x 32 mm and 63 g, it does not cover any neighbouring socket or cable, and it can be combined with the GND Defender when the hum comes from a ground loop between several components.

69634

Data sheet

Product Type
Mains DC blocker
Features
Blocks incoming DC up to 1200 mV
Continuous current rating: 4 A
EMI shielding retained
Flame-resistant UL94-V0 chassis and connectors
Glass passivated semiconductor, 1500 VRMS dielectric strength (UL listed)
Max amplifier power: 880 W/VA at 220 V, 440 W/VA at 110 V
Maximum current rating: over 7 A
Color
White
Technology
Passive
ZERO DC Block
Application
Hi-Fi
Mains power conditioning
Connections
1 × IEC input / 1 × IEC output
Power consumption
90-240 V
Connector
Hospital-grade IEC connectors
Width
3.7 cm
Depth
6.8 cm
Height
3.2 cm
Unit weight
0.1 kg

Specific References

UPC
69634
EAN13
5060738784196
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