[{"id":274046550175,"handle":"accessories","updated_at":"2026-04-24T05:09:57-06:00","published_at":"2021-08-02T03:16:33-06:00","sort_order":"best-selling","template_suffix":"top-level","published_scope":"global","title":"Accessories","body_html":"","image":{"created_at":"2021-08-02T03:16:32-06:00","alt":"Audio Video Accessories","width":1080,"height":429,"src":"\/\/listenup.com\/cdn\/shop\/collections\/article-details.png?v=1641415272"}},{"id":639668617375,"handle":"all-regularly-priced-items","updated_at":"2026-04-24T05:09:57-06:00","published_at":"2024-11-30T15:25:35-07:00","sort_order":"best-selling","template_suffix":null,"published_scope":"web","title":"All Regularly Priced Items","body_html":null},{"id":280456888479,"handle":"audio","updated_at":"2026-04-24T05:09:57-06:00","published_at":"2021-12-02T11:21:36-07:00","sort_order":"best-selling","template_suffix":"top-level","published_scope":"global","title":"Audio","body_html":"","image":{"created_at":"2022-01-06T15:53:45-07:00","alt":"audio","width":971,"height":386,"src":"\/\/listenup.com\/cdn\/shop\/collections\/audio.png?v=1641509626"}},{"id":301037224095,"handle":"ifi-silent-power","title":"iFi Audio SilentPower","updated_at":"2026-04-24T05:09:57-06:00","body_html":"\u003cp style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/ifi\" title=\"Shop at Online Authorized Online Retailer ListenUp\"\u003eiFi's\u003c\/a\u003e \u003ca href=\"https:\/\/listenup.com\/collections\/ifi-silent-power\" title=\"iFi SilentPower features power conditioners, usb noise cleaners, and power cables\"\u003eSilentPower's\u003c\/a\u003e journey began two decades ago at our ultrahigh-end sister company, AMR, where iFi pioneered technologies like AMR's OptiMains and patented ANC technology. \u003cbr\u003eThis innovation is now a staple in our products, including the iPower and iPurifier series. Born out of a quest for high-quality power supplies for iFi audio products.\u003c\/p\u003e\n\u003c!----\u003e","published_at":"2024-06-20T10:14:20-06:00","sort_order":"created-desc","template_suffix":"","disjunctive":false,"rules":[{"column":"vendor","relation":"equals","condition":"iFi"},{"column":"title","relation":"contains","condition":"silent"},{"column":"title","relation":"not_contains","condition":"Clearance"}],"published_scope":"global","image":{"created_at":"2024-06-20T10:39:17-06:00","alt":"Shop Silent Power at Online Retailer ListenUp","width":1080,"height":1080,"src":"\/\/listenup.com\/cdn\/shop\/collections\/Untitled_design_0de29b13-5aff-4cf3-94a3-504844d1f4ee.png?v=1718901558"}},{"id":275936739487,"handle":"power-protection","updated_at":"2026-04-24T05:09:57-06:00","published_at":"2021-08-25T08:13:13-06:00","sort_order":"best-selling","template_suffix":"default","published_scope":"global","title":"Power Protection and Conditioning","body_html":"","image":{"created_at":"2022-01-05T14:18:40-07:00","alt":"power protection for av equipment","width":1080,"height":1080,"src":"\/\/listenup.com\/cdn\/shop\/collections\/power-protection.png?v=1712337124"}},{"id":294609191071,"handle":"ifi-audio","title":"Shop All iFi Audio","updated_at":"2026-04-24T05:09:57-06:00","body_html":"\u003cp style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/listenup.com\/pages\/ifi\" title=\"Shop all iFi Audio - headphone amps, dac, phono preamps, and more\"\u003eiFi Audio\u003c\/a\u003e is a UK-based manufacturer known for creating high-performance, compact audio gear that brings studio-quality sound to home and portable setups. With a focus on innovation, they design DACs, headphone amps, and streamers that blend audiophile-grade performance with cutting-edge technology.\u003c\/p\u003e","published_at":"2023-10-19T10:34:59-06:00","sort_order":"best-selling","template_suffix":"","disjunctive":false,"rules":[{"column":"vendor","relation":"equals","condition":"iFi"}],"published_scope":"global","image":{"created_at":"2024-05-01T07:45:16-06:00","alt":null,"width":1080,"height":1080,"src":"\/\/listenup.com\/cdn\/shop\/collections\/Untitled_design_6.png?v=1714571117"}},{"id":301151355039,"handle":"welcome10","updated_at":"2026-04-24T06:05:32-06:00","published_at":"2024-07-02T15:18:25-06:00","sort_order":"best-selling","template_suffix":null,"published_scope":"web","title":"Welcome10","body_html":null}]
The SilentPower DC Blocker+ is a premium DC offset filter that stops unwanted DC voltage from entering your amplifier or AV equipment to eliminate transformer hum. Featuring ZERO DC Block Technology (blocking up to 1,200mV), it helps improve transformer efficiency, reduce heat, and support cleaner, quieter playback. Built for high-power systems, it offers global 90–250V compatibility with a 10A continuous current rating and hospital-grade IEC connectors. Its compact IEC inline design preserves EMI shielding and installs in seconds for a quieter, higher-fidelity listening experience.
Get the Details
Features & Specs
ZERO DC Block Technology (up to 1,200mV)
Actively prevents DC offset on the mains from reaching your equipment, addressing a major cause of toroidal transformer buzzing and performance instability.
Hum reduction for cleaner listening
By removing DC-induced mechanical vibration and related noise artifacts, the system’s background becomes quieter—helping fine detail and clarity come through more naturally.
Designed for high-power equipment
With a 10A continuous current rating and up to ≤14A maximum current rating, it’s built to suit demanding amplifiers and AV components that typical solutions may not handle confidently.
Worldwide voltage support
The 90–250V rating makes it a simple drop-in upgrade across regions, ideal for international systems or relocations.
Premium connectivity and noise control
Hospital-grade IEC connectors provide secure contact, while EMI shielding is retained to continue suppressing unwanted interference.
Compact, practical installation
The inline IEC form factor is purposely sized to avoid blocking adjacent sockets and cables, making it easy to add behind crowded racks and power strips.
ZERO DC Block Technology (up to 1,200mV)
Actively prevents DC offset on the mains from reaching your equipment, addressing a major cause of toroidal transformer buzzing and performance instability.
Hum reduction for cleaner listening
By removing DC-induced mechanical vibration and related noise artifacts, the system’s background becomes quieter—helping fine detail and clarity come through more naturally.
Designed for high-power equipment
With a 10A continuous current rating and up to ≤14A maximum current rating, it’s built to suit demanding amplifiers and AV components that typical solutions may not handle confidently.
Worldwide voltage support
The 90–250V rating makes it a simple drop-in upgrade across regions, ideal for international systems or relocations.
Premium connectivity and noise control
Hospital-grade IEC connectors provide secure contact, while EMI shielding is retained to continue suppressing unwanted interference.
Compact, practical installation
The inline IEC form factor is purposely sized to avoid blocking adjacent sockets and cables, making it easy to add behind crowded racks and power strips.
Expert Insight
Enjoy music without the annoyance of unwanted hum.
Dylan Crane
Brand Manager
Details
iFi SilentPower DC Blocker+
SilentPower’s DC Blocker+ is a high-performance DC offset filter that installs at your component’s IEC power inlet to stop unwanted DC voltage from riding on the AC mains. By blocking incoming DC (up to 1,200mV), it helps eliminate transformer mechanical hum, improves transformer efficiency, and can reduce heat—so your amplifier, DAC, or AV gear runs quieter and sounds cleaner. Built for demanding systems, it’s globally compatible (90–250V) and engineered for high-power equipment with a 10A continuous current rating and up to ≤14A maximum current rating. Hospital-grade IEC connectors, retained EMI shielding, and a compact chassis make it an easy, confidence-inspiring upgrade that won’t get in the way of other plugs and cables. If your toroidal transformer is buzzing, the DC Blocker+ is the simple “fit-and-forget” fix that restores quiet backgrounds and uninterrupted listening.
What It's Good At:
Eliminating transformer mechanical hum caused by DC offset on the mains
Improving system quietness for cleaner detail, tighter bass definition, and better clarity
Supporting high-power amplifiers and AV gear with a 10A continuous current rating
Maintaining EMI shielding for ongoing noise suppression without compromising safety
Clean, compact IEC-in/IEC-out installation that won’t block nearby sockets or cables
Delivering dependable, premium connectivity with hospital-grade IEC connectors
iFi SilentPower DC Blocker+ Full Specifications:
Product name: DC Blocker+
Brand/line: SilentPower by iFi
SKU: 03-06-064-0001-01
Type: DC induced noise reducer / DC offset blocker (mains DC filter)
Input/Output: Universal IEC (IEC-in/IEC-out inline installation at device power inlet)
ZERO DC Block Technology: Blocks incoming DC up to 1,200mV (also described as intelligently blocking over 1,000mV DC)
Voltage rating (global compatibility): 90–250V
Continuous current rating: 10A
Maximum current rating: ≤14A
Max amplifier power (guideline): 2200W or VA @ 220V / ~1100W or VA @ 110V
Connectors: Hospital-grade IEC connectors
EMI shielding: Retained for continued noise suppression
Safety: Equipment safety is unaffected (designed not to compromise safety)
Design note: Compact form factor designed not to obstruct other connectors, sockets, or cables
iFi SilentPower DC Blocker+ Q&A:
Will the DC Blocker+ stop transformer hum in my amplifier?
Yes—DC Blocker+ is designed to block unwanted DC voltage on the AC mains (up to 1,200mV), a common cause of toroidal transformer mechanical hum.
Where do I install the DC Blocker+?
Install it inline at the component’s power inlet: plug the DC Blocker+ male IEC into your device, then connect your existing IEC power cable into the DC Blocker+ female IEC.
Is it safe to use with expensive audio equipment?
It is designed to preserve equipment safety while addressing DC offset, and it retains EMI shielding for continued noise suppression.
Will it work in my country’s voltage?
Yes. It’s globally compatible and rated for 90–250V operation.
Can I use it with high-power amplifiers and AV receivers?
Yes. It’s built for high-power equipment with a 10A continuous current rating (≤14A maximum) and supports high amplifier power demands.
Does it improve sound quality or only reduce hum?
By removing DC-induced transformer noise and helping reduce interference, it can lower noise floors and improve perceived clarity, focus, and overall listening comfort.
Will it block other plugs or cables behind my gear?
Unlikely—the compact design is intended not to obstruct nearby connectors and cables.
What comes included with the DC Blocker+?
You receive the DC Blocker+ and a user manual for quick, straightforward setup.
Reviews
Product Description
Product Description
The SilentPower DC Blocker+ is a premium DC offset filter that stops unwanted DC voltage from entering your amplifier or AV equipment to eliminate transformer hum. Featuring ZERO DC Block Technology (blocking up to 1,200mV), it helps improve transformer efficiency, reduce heat, and support cleaner, quieter playback. Built for high-power systems, it offers global 90–250V compatibility with a 10A continuous current rating and hospital-grade IEC connectors. Its compact IEC inline design preserves EMI shielding and installs in seconds for a quieter, higher-fidelity listening experience.
Get the Details
Features & Specs
Features & Specs
ZERO DC Block Technology (up to 1,200mV)
Actively prevents DC offset on the mains from reaching your equipment, addressing a major cause of toroidal transformer buzzing and performance instability.
Hum reduction for cleaner listening
By removing DC-induced mechanical vibration and related noise artifacts, the system’s background becomes quieter—helping fine detail and clarity come through more naturally.
Designed for high-power equipment
With a 10A continuous current rating and up to ≤14A maximum current rating, it’s built to suit demanding amplifiers and AV components that typical solutions may not handle confidently.
Worldwide voltage support
The 90–250V rating makes it a simple drop-in upgrade across regions, ideal for international systems or relocations.
Premium connectivity and noise control
Hospital-grade IEC connectors provide secure contact, while EMI shielding is retained to continue suppressing unwanted interference.
Compact, practical installation
The inline IEC form factor is purposely sized to avoid blocking adjacent sockets and cables, making it easy to add behind crowded racks and power strips.
ZERO DC Block Technology (up to 1,200mV)
Actively prevents DC offset on the mains from reaching your equipment, addressing a major cause of toroidal transformer buzzing and performance instability.
Hum reduction for cleaner listening
By removing DC-induced mechanical vibration and related noise artifacts, the system’s background becomes quieter—helping fine detail and clarity come through more naturally.
Designed for high-power equipment
With a 10A continuous current rating and up to ≤14A maximum current rating, it’s built to suit demanding amplifiers and AV components that typical solutions may not handle confidently.
Worldwide voltage support
The 90–250V rating makes it a simple drop-in upgrade across regions, ideal for international systems or relocations.
Premium connectivity and noise control
Hospital-grade IEC connectors provide secure contact, while EMI shielding is retained to continue suppressing unwanted interference.
Compact, practical installation
The inline IEC form factor is purposely sized to avoid blocking adjacent sockets and cables, making it easy to add behind crowded racks and power strips.
Expert Insight
Expert Insight
Enjoy music without the annoyance of unwanted hum.
Dylan Crane
Brand Manager
Details
Details
iFi SilentPower DC Blocker+
SilentPower’s DC Blocker+ is a high-performance DC offset filter that installs at your component’s IEC power inlet to stop unwanted DC voltage from riding on the AC mains. By blocking incoming DC (up to 1,200mV), it helps eliminate transformer mechanical hum, improves transformer efficiency, and can reduce heat—so your amplifier, DAC, or AV gear runs quieter and sounds cleaner. Built for demanding systems, it’s globally compatible (90–250V) and engineered for high-power equipment with a 10A continuous current rating and up to ≤14A maximum current rating. Hospital-grade IEC connectors, retained EMI shielding, and a compact chassis make it an easy, confidence-inspiring upgrade that won’t get in the way of other plugs and cables. If your toroidal transformer is buzzing, the DC Blocker+ is the simple “fit-and-forget” fix that restores quiet backgrounds and uninterrupted listening.
What It's Good At:
Eliminating transformer mechanical hum caused by DC offset on the mains
Improving system quietness for cleaner detail, tighter bass definition, and better clarity
Supporting high-power amplifiers and AV gear with a 10A continuous current rating
Maintaining EMI shielding for ongoing noise suppression without compromising safety
Clean, compact IEC-in/IEC-out installation that won’t block nearby sockets or cables
Delivering dependable, premium connectivity with hospital-grade IEC connectors
iFi SilentPower DC Blocker+ Full Specifications:
Product name: DC Blocker+
Brand/line: SilentPower by iFi
SKU: 03-06-064-0001-01
Type: DC induced noise reducer / DC offset blocker (mains DC filter)
Input/Output: Universal IEC (IEC-in/IEC-out inline installation at device power inlet)
ZERO DC Block Technology: Blocks incoming DC up to 1,200mV (also described as intelligently blocking over 1,000mV DC)
Voltage rating (global compatibility): 90–250V
Continuous current rating: 10A
Maximum current rating: ≤14A
Max amplifier power (guideline): 2200W or VA @ 220V / ~1100W or VA @ 110V
Connectors: Hospital-grade IEC connectors
EMI shielding: Retained for continued noise suppression
Safety: Equipment safety is unaffected (designed not to compromise safety)
Design note: Compact form factor designed not to obstruct other connectors, sockets, or cables
iFi SilentPower DC Blocker+ Q&A:
Will the DC Blocker+ stop transformer hum in my amplifier?
Yes—DC Blocker+ is designed to block unwanted DC voltage on the AC mains (up to 1,200mV), a common cause of toroidal transformer mechanical hum.
Where do I install the DC Blocker+?
Install it inline at the component’s power inlet: plug the DC Blocker+ male IEC into your device, then connect your existing IEC power cable into the DC Blocker+ female IEC.
Is it safe to use with expensive audio equipment?
It is designed to preserve equipment safety while addressing DC offset, and it retains EMI shielding for continued noise suppression.
Will it work in my country’s voltage?
Yes. It’s globally compatible and rated for 90–250V operation.
Can I use it with high-power amplifiers and AV receivers?
Yes. It’s built for high-power equipment with a 10A continuous current rating (≤14A maximum) and supports high amplifier power demands.
Does it improve sound quality or only reduce hum?
By removing DC-induced transformer noise and helping reduce interference, it can lower noise floors and improve perceived clarity, focus, and overall listening comfort.
Will it block other plugs or cables behind my gear?
Unlikely—the compact design is intended not to obstruct nearby connectors and cables.
What comes included with the DC Blocker+?
You receive the DC Blocker+ and a user manual for quick, straightforward setup.
