iFi DC Blocker+ Filtro de energia
Best power filter for audiophiles struggling with persistent amplifier transformer hum.
Say goodbye to mechanical hum with the iFi DC Blocker+ Power Filter! This clever device is designed to tackle a common issue in audio systems: DC voltage present in the AC mains supply. This DC contamination, often caused by household appliances, can lead to transformer saturation in your amplifier, resulting in a noticeable and persistent buzzing sound. By simply placing the DC Blocker+ at the IEC input of your amplifier, it intelligently blocks over 1,000mV of DC current from entering, effectively eliminating that annoying transformer hum while maintaining EMI shielding. It's perfect for high-power equipment, especially those with sensitive toroidal transformers, as it supports a 10A DC current rating and is globally compatible (90-250V). Plus, its compact design ensures it won't block adjacent sockets or cables. Enjoy your music without unwanted noise!
$129.00
Owner Satisfaction
4.5
/ 5
Category Rank
212
/ 776
#212 in Power Control Units
Price vs Category Average
-86%
Below average
Who it's for
- Audiophiles bothered by mechanical buzzing from their power amplifiers
- Owners of high-power systems requiring unrestricted current flow
- Listeners seeking a quieter background and improved sonic detail
Who should skip it
- Users needing comprehensive protection against RFI and EMI interference
- Budget-conscious buyers looking for basic power strip functionality
- Owners whose equipment lacks DC offset or transformer hum issues
Performance breakdown
Hum suppression
Effectively eliminates persistent transformer buzzing caused by DC mains contamination.
Current capacity
Handles high-power equipment with a robust 10A current rating.
Ease of installation
Simple plug-and-play design fits directly into standard IEC inputs.
Form factor
Compact housing ensures no interference with adjacent power sockets.
EMI shielding
Maintains critical electromagnetic interference protection while filtering the power supply.
Global compatibility
Versatile voltage support works seamlessly across international power standards.
Key Specs
Tecnologia ZERO DC Block – impede que a corrente contínua entre no seu amplificador e elimina o zumbido do transformador do amplificador.
Projetado para equipamentos de alta potência (classificação de corrente contínua
10A).
A blindagem EMI é mantida.
Semicondutor passivado de vidro de alto desempenho.
Alta rigidez dielétrica de caixa de 1500VRMS.
Listado pela UL.
Soquete/conector/chassi IEC resistente a chamas (polímeros à prova de fogo UL94-V0).
Compatível globalmente (90-250 V).
Features
- Bloqueia de forma inteligente mais de 1.000 mV CC para eliminar o zumbido do transformador.
- A blindagem EMI é mantida.
- A segurança do equipamento não é afetada.
- Projetado para equipamentos de alta potência (classificação de corrente contínua: 10A).
- Design compacto.
What customers say
Customers overwhelmingly praise the iFi DC Blocker+ for its specialized ability to silence the dreaded mechanical hum often emanating from high-current toroidal transformers in high-fidelity audio gear. Reviewers frequently describe the transformation from a distracting buzz to absolute silence, calling the device a "must-have" solution for polluted mains power environments where DC offset is an issue. The consensus highlights its plug-and-play simplicity and robust, high-quality construction, typical of iFi products. Users report that the device is highly effective at its primary function—eliminating DC voltage from the AC line—which immediately resolves the physical vibration and noise in sensitive components like power amplifiers. While the price point places it firmly in the audiophile accessory category, users who suffer from persistent DC offset issues deem the investment entirely worthwhile, arguing that the resulting peace and quiet significantly enhances the listening experience and protects equipment. A small minority of users who already have clean power or use equipment less susceptible to DC offset may find the effects subtle, but for those experiencing audible hum, the results are dramatic and immediate. The sentiment strongly suggests that the DC Blocker+ successfully solves a frustrating, specific problem with high efficacy, cementing its status as a highly effective and necessary power conditioning tool for serious audio enthusiasts.
Know before you buy
If you hear a persistent mechanical buzzing or humming sound coming directly from your amplifier or power supply, it is likely caused by DC voltage in your AC mains. The DC Blocker+ is specifically designed to eliminate this noise.
The device is designed to be placed directly at the IEC input of your amplifier or power component. You simply connect the DC Blocker+ to your device's power inlet and then plug your power cable into the other end of the blocker.
No, the DC Blocker+ is designed to be transparent to your audio signal and does not compromise the safety of your equipment. It maintains EMI shielding and is rated for high-power usage up to 10A.
Yes, it is globally compatible and supports a voltage range from 90V to 250V. It can be used safely in any region regardless of the local mains voltage.
The DC Blocker+ is specifically engineered to block DC current and eliminate transformer hum. It is not a surge protector or a comprehensive power conditioner, so it should be used alongside your existing power filtration setup if you require those additional features.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$129