Stop Annoying Power Amp Transformer Hum
Many large amplifiers have a really annoying mechanical hum, which is 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 AC power line mains that makes its way through to the mains transformer, causing the transformer to become 'saturated' and start to hum.
The DC Blocker from iFi Audio 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. The DC Blocker therefore eliminates amplifier transformer hum.
Behind Every Good Component is a DC Blocker
The bigger the amplifier, usually the larger the toroidal transformer which is susceptible to residual DC voltage. Just add the DC Blocker at the IEC to stop DC from getting in. EMI shielding is fully retained. Thanks to its small size, it won’t block any other connectors, jacks, or cables.
Exclusive iFi ZERO DC Block technology stops DC from getting into your amplifier and eliminates amplifier transformer hum caused by DC. As a result, the transformer will operate in an optimum environment. With the DC Blocker, there is 0 (zero) DC pass through.
The DC Blocker boasts a high-performance glass passivated semiconductor and has a high-case dielectric strength of 1500VRMS. UL listed, it uses a DC flame resistant IEC socket, connecter, and chassis (fireproof polymers UL94-V0). IEC connectors are hospital grade components.
