iFi DC Blocker | Noise Reducer-Bloom Audio
iFi DC Blocker | Noise Reducer-Bloom Audio
iFi DC Blocker | Noise Reducer-Bloom Audio
iFi DC Blocker | Noise Reducer-Bloom Audio
iFi DC Blocker | Noise Reducer-Bloom Audio

iFi DC Blocker | Noise Reducer

Regular price$129.00

The amplifier is the heart of your system.

Many large amplifiers have a really annoying mechanical hum (emitted from the toroidal transformer itself).

You can hear it when you place your ear close or next to the chassis.

This is caused by a small amount of DC voltage in the mains which makes its way through to the mains transformer, it will become ‘saturated’ and start to hum like a trooper.

The DC Blocker is a clever device that you place at the IEC (at the rear power inlet) and as its name implies, it stops DC from getting into the amplifier. It therefore eliminates amplifier transformer hum.

Cute. Clever.

All the benefits of cutting out annoying hum with no drawbacks.

  • Intelligently stops any DC voltage from the mains to eliminate transformer hum
  • EMI shielding is retained
  • Equipment safety is unaffected

DC Blocker from iFi audio

Behind every good component is a DC Blocker.

The bigger the amplifier, usually, the larger the toroidal which is susceptible to residual DC voltage. JUst add the DC Blocker at the IEC to stop DC from getting in.

  • 90-240V
  • Maximum rating >10A, continuous current rating 7A

Small size, universal application, won’t block any other connectors, sockets, or cables

ZERO DC Block technology – stops DC from getting into your amplifier and eliminates amplifier transformer hum.

High-performance glass passivated semiconductor.  High-case dielectric strength of 1500VRMS. UL listed.  Flame resistant IEC socket/connecter/chassis (Fireproof polymers UL94-V0).

EMI shielding is retained.

The DC Blocker removes such DC and eliminates such mechanical transformer hum, makes the transformer operate at the optimum environment. With the DC Blocker, there is 0 DC pass through.


ZERO DC Block technology Blocks incoming DC – up to 1,200mV
Voltage rating 90 – 240 volts
Maximum current rating > 10A
Continuous current rating 7A
Universal IEC Hospital-grade IEC connectors
Dimensions 68 x 37 x 32 mm / 2.7” x 1.5” x 1.3”
Weight 63g / 2.2oz

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Customer Reviews

Based on 2 reviews
Stephen Peter
It works

I was skeptical about what kind of results or improvements I might get by adding the DC Blocker to many of my components. It’s difficult to point to changes as the reason your system seems to work better. Bottom line these have worked for me and they will continue to be a part of my system. Their reasonable cost also makes it easier to try them.

Peter Masse
If I dc blocker

Hey everyone this dc blocker really works I got mine today and my amp had a hum soon as I put this in it was quite no hum it's like a new amp awesome man thxxx

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