Inakustik AC-3200 DC-Blocker SCHUKO
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Overview
The Inakustik AC-3200 power strip represents a precise technical approach to solving a problem that is often overlooked yet omnipresent in audio installations: the presence of DC offset in the household power supply. This power bar integrates DC filtering technology that protects the toroidal transformers in hi-fi equipment from magnetic saturation, thereby eliminating unwanted mechanical hum and optimizing the system’s sound performance.
The Issue of DC Offset in Mains Power
Many modern household devices inadvertently create an asymmetry in the alternating current of the electrical grid. Switch-mode power supplies, dimmers, microwaves, and certain appliances only draw power from one half of the sine wave, thus generating a parasitic DC component. Although this disturbance may seem minor (a few hundred millivolts), it causes particularly troublesome audible effects on audio equipment equipped with toroidal transformers.
When a toroidal transformer operates with this asymmetry, its magnetic core enters partial saturation. This magnetostriction phenomenon causes microscopic physical variations in the core, resulting in an audible mechanical hum emitted directly from the device’s chassis. High-power transformers (500 VA and above) are especially sensitive due to their low primary winding resistance. Beyond the noise nuisance, this asymmetric saturation reduces transformer efficiency, increases operating temperature, and can introduce distortion into the audio signal.
Technical Architecture and German Engineering
The AC-3200 embodies Inakustik’s manufacturing philosophy, with every component designed and assembled in the workshops of Ballrechten-Dottingen, in the Black Forest. The internal structure is based on pure copper busbars with a generous cross-section of 16 mm², ensuring optimal conductivity and stable current distribution up to the maximum load of 3680 watts. This robust architecture minimizes resistive losses and voltage drops, even during the high current demands typical of power amplifiers.
The brushed aluminum housing is not merely an aesthetic feature. Its sturdy construction effectively protects the internal components while providing natural heat dissipation. The six high-quality SCHUKO sockets are directly soldered to the copper busbars, eliminating intermediate connections that could introduce parasitic resistance. The mains connection is made via a high-capacity IEC C20 connector, a professional standard that allows the use of thick-gauge power cables.
Three Versions Tailored to Specific Needs
Inakustik offers the AC-3200 in three variants, each optimized for different system configurations. The DC-15 version is the entry-level model, perfectly suited for compact systems and modest setups where DC offset is present but limited. The DC-30, with double the capacity, is ideal for medium-sized systems requiring greater dynamic reserve. The DC-45, the top version with triple capacity, is designed for the most demanding high-end installations where multiple high-power devices operate together.
This gradation does not concern the admissible power—all three versions support 3680 watts—but rather the DC filtering capacity. Systems with numerous high-power toroidal transformers will particularly benefit from the higher versions, ensuring total elimination of DC offset even under the most challenging power grid conditions.
Manufacturing Process and Quality Control
Each AC-3200 follows a rigorous manufacturing protocol in the Ballrechten-Dottingen workshop. Manual assembly allows for constant visual inspection of every solder and connection. The technicians, some of whom have worked for the company for over three decades, methodically assemble each power strip according to procedures established and refined over the years.
Individual quality control is the crucial final step. Each unit undergoes electrical testing in accordance with the strictest CE standards: high-current protective conductor continuity test, high-voltage insulation measurement (dielectric test), and complete functional verification. This unit-by-unit approach, as opposed to sample testing, ensures that every delivered AC-3200 meets the stated specifications and will operate reliably for years.
Documentation
Technical Specifications
Electrical Specifications
- Maximum total load: 3680 W (230 V AC / 16 A)
- Rated voltage: 250 V AC
- Rated frequency: 50 / 60 Hz
- Number of outlets: 6 x high-quality SCHUKO
- Mains connection type: high-capacity IEC C20
- Protection class: class 1
Construction and Materials
- Internal busbars: 16 mm² section in pure copper
- Enclosure: durable and elegant brushed aluminum
- Dimensions: 512 x 77 x 77 mm
- High-quality outlets for stable current distribution
- Robust construction for optimal conductivity
Versions and Filtering Capacities
- DC-15: standard filtering
- Recommended for compact hi-fi systems and modest setups
- DC-30: medium capacity
- Recommended for mid-range hi-fi systems requiring more dynamics
- DC-45: maximum capacity
- Recommended for very demanding high-end hi-fi systems
Recommended Applications
- Analog filter (type I): ideal for amplifiers, preamplifiers, turntables
- Digital filter (type II): optimal for network players, digital-to-analog converters, streamers
Features and Benefits
- DC component filtering: eliminates DC offset injected into the mains, preventing toroidal transformer saturation and removing unwanted hum
- Improved sound quality: symmetrical and stable power supply for clearer, more dynamic, and precise sound
- Integrated protection: overload, overvoltage, and DC blocker integrated depending on the version
- Simple installation: compact and robust design suitable for complex audiophile systems
Safety and Compliance
- Integrated surge protection
- CE certification in compliance with strict electrical standards
- Compliance: CE, REACH, RoHS
- Guaranteed stable power supply even during consumption peaks
Delivery Contents
- 1 x AC-3200 power strip with DC blocker filter (selected version)
- User manual and technical data sheet
- Customer service and technical support available
- Free trial listening option
General Information
- Product reference: AC-3200 high-quality power strip
- Product number: 007632000
- Available versions: DC-15, DC-30, DC-45
- Quality level: audiophile reference
- Manufacturing: 100% made in Germany
- Complete in-house development: from concept to prototypes, assembled in the workshop in Germany
- Strict quality control: individual CE tests (continuity, high-voltage insulation, conductor protection)
Frequently asked questions
How do I choose between the DC-15, DC-30, and DC-45 versions?
The choice mainly depends on the size and complexity of your audio system. For a compact setup with an integrated amplifier and digital sources, the DC-15 is generally sufficient. Systems with separate power amps or multiple devices with toroidal transformers will benefit from the DC-30. The DC-45 is recommended for complex multi-amplified installations or high-end home theater systems with numerous high-power devices.
Can the AC-3200 power strip improve sound even if there’s no humming issue?
Even in the absence of audible hum, eliminating DC offset allows transformers to operate under optimal conditions. This results in better linearity, reduced distortion, and improved dynamics. The massive copper busbars and meticulous construction also contribute to more stable power distribution.
Can I connect digital devices to the AC-3200 DC-Blocker?
Absolutely. Unlike versions with specific filtering (Filter Analog or Filter Digital), the DC-Blocker version is suitable for all types of devices. It simply removes the DC component without affecting the AC signal, making it universally compatible with both analog and digital equipment.
What is the difference between the IEC C20 connector and a standard connector?
The IEC C20 connector accepts thicker cables than the standard C14 connector. This increased capacity allows the use of large-diameter audiophile power cables without restriction, thus optimizing current transmission to the power strip. The more robust connection also ensures better mechanical strength and minimal contact resistance.
Does the AC-3200 require a break-in period?
Like any new electrical equipment, a period of use allows the connections to stabilize and the components to reach their optimal thermal balance. However, unlike some audio components, the benefits of the AC-3200 are immediately noticeable upon installation, especially if your system previously suffered from hum due to DC offset.
Is it possible to combine several AC-3200 units in the same installation?
Technically possible, this configuration generally does not provide any additional benefit. A single properly sized AC-3200 (DC-30 or DC-45 for large systems) is sufficient to handle all connected equipment. Daisy-chaining could even introduce unwanted series resistance.
How can I tell if my installation suffers from DC offset?
The most obvious symptom is mechanical hum emitted directly by the devices, especially noticeable on power amplifiers at idle. This noise comes from the chassis itself, not the speakers. Other signs include excessive transformer heat or variations in hum level depending on the time of day, reflecting changes in the local power grid load.
- Eco-contribution included in the sale price.
