iFi DC Blocker by iFi Audio

The amplifier is the heart of your system.

If you have a mechanical hum deploy the DC Blocker.
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.
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
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 >7A continuous current rating 4A
Small size universal application won’t block any other connectors sockets or cables

- 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.
- EMI shielding is retained.
- High-performance glass passivated semiconductor. High-case dielectric strength of 1500VRMS. UL listed. Flame resistant IEC socket/connecter/chassis (Fireproof polymers UL94-V0
- ZERO DC Block technology – stops DC from getting into your amplifier and eliminates amplifier transformer hum.