Skip to content
LAST CHANCE: Bowers & Wilkins 603 S2 (Only 3 Pairs Remaining)
LAST CHANCE: Bowers & Wilkins 603 S2 (Only 3 Pairs Remaining)
iFi Audio DC Blocker

iFi Audio DC Blocker

by iFi Audio
€145.37 - €145.37
€145.37
€145.37
€145.37 - €145.37
€145.37

0 in stock
for immediate dispatch or click & collect
Available to order (with lead time)
For latest lead times or to put down a deposit please contact us
In a rush? See what's available for immediate dispatch

The DC Blocker is a smart device placed at the IEC to stop DC from getting into the amplifier which eliminates amplifier transformer hum for better audio.

Got big amplifier. Bye bye mechanical hum.

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

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).

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
Visit our showrooms

Visit our showrooms

We know that there's nothing quite like seeing, hearing and feeling what a product is really like. Whether you're investigating a specific product or want to compare within a category, we can help.

Our experts teams will ensure that you have the best advice and products to choose from. Our Dublin Showroom is conveniently located with free parking. All with no obligation to buy.

Book a free personal consultation now

Blog posts

  • How to Balance Your Tonearm

    How to Balance Your Tonearm

    Plus, what does anti skating mean and other important questions answered.   What Does Anti Skating Mean? In a nutshell, the anti-skate feature on your turntable stops your tonearm from skating across the centre of your record as it comes...

    Read now
See more
Custom Smart Home Installations

Custom Smart Home Installations

Your Home. Simplified

Learn more