FAQs

Although this is mechanically possible, one DC Blocker is enough in most cases.

If you’ll hear audible hum inside a powered audio product, especially with a toroidal transformer inside, our DC Blocker was designed to either lower or remove that noise.

You don’t, it’s a passive component that does its job upon connecting it right in-between a power cable and audio product powered by it.

Insert a DC Blocker into the mains input of your equipment at the IEC power inlet. Plug the power cord into the DC Blocker. You can use a DC Blocker…

By blocking the DC entering the transformer primary this hum is reduced.

Most of them are, but our DC Blocker is by design as small as possible yet capable of blocking up to 1,200mV of DC voltage.

Yes, DC Blocker is safe to use as it is a fireproof product.

Although this unit will still provide them with power, there is little benefit in doing so. In a switchmode power supply the AC mains is first rectified into DC, after…

You need only one DC Blocker per power bar/conditioner.

Yes, our DC Blocker is a passive power filter indeed, meant to block DC voltage from getting inside an audio component’s transformer.

The majority of audio electronic equipment uses a power transformer or transformers for their power supply. Mains power starts out being a pure sine wave at the power station but…

It blocks up to 1.2V of DC on the AC mains from reaching the power transformer.

The DC Blocker aims to reduce noisy physical transformer hum caused by DC on the mains. It’s designed for equipment that uses a mains power transformer in its power supply.

This unit is mainly designed for source equipment and amplifiers with a power transformer rating up to 500W (for 230V) or 350W (for 115V). Using equipment with a higher power…

As toroidal and R-core transformers are more efficient than conventional EI transformers they are quite sensitive to any DC entering them from the mains. If your equipment contains one of…

AMR equipment already includes DC blocker circuitry internally, so there is no need to add this device to them.

Our DC Blocker was designed not to. If anything, it will improve a connected component’s sound quality due to removal of excess DC voltage.