DC Blocker
SKU: 03-06-041-0001-00
Got big amplifier. Bye bye mechanical hum.
Key Features Explained
Optical Galvanic Isolation
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
EMI shielding is retained.
Signal Regeneration
High-performance glass passivated semiconductor. High-case dielectric strength of 1500VRMS. UL listed. Flame resistant IEC socket/connecter/chassis (Fireproof polymers UL94-V0).
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 and 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 >7A, continuous current rating 4A
- Small size, universal application, won’t block any other connectors, sockets, or cables
How do I use?
DC Blocker
Plug the DC Blocker into the back of your amplifier to stop DC from the mains causing transformer hum, in addition to retaining EMI shielding at the power source
Video Review
What is in the box?
- 1x DC-blocker
- 1x User Manual
Specifications: DC Blocker
ZERO DC Block technology
Blocks incoming DC – up to 1,200mV
Voltage rating
90 – 240 volts
Maximum current rating
> 7A
Max amplifier power
880W or VA on 220v
440W or VA on 110v
Continuous current rating
4A
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
Note
The image colour may differ from the actual product due to lighting. Please refer to the product for accuracy.
Frequently Asked Questions
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.
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 on each piece of equipment that has a power transformer in its power supply.
By blocking the DC entering the transformer primary this hum is reduced.
Yes, DC Blocker is safe to use as it is a fireproof product.
You need only one DC Blocker per power bar/conditioner.
It blocks up to 1.2V of DC on the AC mains from reaching the power transformer.
AMR equipment already includes DC blocker circuitry internally, so there is no need to add this device to them.
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 rating is ok though, as any more power demanded through the DC Blocker is transferred straight to the equipment. DC blocking will still work, but to a lesser degree.
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.
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