Taga Harmony PF-1000DC silver

Eight outlets, two complementary technologies: the PF-1000DC combines mains noise filtering and DC component blocking in a single chassis. This evolution of the PF-1000 adds a DC Blocker circuit that targets vibrations and hum in toroidal transformers. With its four differentiated outlet types, it allows you to adapt power treatment to each device in a hi-fi or home cinema system.

Why filter and block DC?

The domestic power grid carries two types of interference that affect audio-video equipment.

Electromagnetic interference (EMI) comes from equipment connected to the same network: refrigerators, air conditioners, dimmers, chargers. This interference varies depending on the time of day and activity in the building. It results in hiss from the speakers or image degradation.

The DC component (DC offset) results from an imbalance between the positive and negative cycles of the current. Toroidal transformers are sensitive to it: they start to vibrate mechanically, producing an audible hum and a temperature rise. This phenomenon often affects integrated amplifiers, phono preamplifiers, and linear power supplies.

Four outlet configurations for four uses

The PF-1000DC offers eight Schuko outputs divided into three distinct groups.

Two outlets pass the current through without any treatment (direct outlets). They are suitable for power amplifiers, which do not always respond well to filtering that may restrict dynamics during high current peaks.

Two other outlets add the DC blocker without filtering. This configuration targets devices equipped with toroidal transformers that hum, such as preamplifiers or linear power supplies, when filtering is not necessary or desired.

The remaining four outlets combine filtering and DC blocking. They are intended for digital sources (CD players, DACs, streamers) and phono preamplifiers, which are more sensitive to high-frequency interference.

This segmentation makes it possible to choose the appropriate treatment for each device rather than imposing a single solution.

Construction and finish

The chassis measures 43 cm deep, 14 cm wide, and 13 cm high. It weighs 4.2 kg. The front and rear panels are made of brushed aluminum, with the rest of the structure in folded steel, painted and internally damped with dense foam that absorbs micro-vibrations. The internal wiring uses large-gauge conductors with screwed connections to reduce impedance.

The front panel features an analog voltmeter that displays mains voltage in real time and a master power switch. On the rear, there is an IEC C14 inlet for the power cable, a polarity inversion switch, a ground terminal, and the resettable circuit breaker.

Built-in diagnostic tools

The phase detector indicates whether the polarity of the connection is correct. A switch allows you to invert the phase without having to flip the mains plug. This function simplifies cable optimization in an installation where several devices are interconnected: proper phase alignment reduces leakage currents and ground loops.

The voltmeter allows you to monitor power stability. Large variations may indicate a problem with the installation or an overload on the circuit.

Surge protection

The PF-1000DC includes protection against voltage spikes. The stated specifications: maximum surge current of 4500 A (8/20 µs pulse), 3000 V peak voltage over 10 ms, clamping voltage of 775 V. These values correspond to protection against transients related to indirect lightning strikes or switching on the grid.

This protection does not replace a panel-mounted surge protector but adds an extra line of defense for sensitive equipment.

Power and consumption

The total permissible load is 14 A, i.e. 3220 W at 230 V. This is sufficient to power a complete system: integrated amplifier, sources, phono preamplifier, and television. No-load power consumption remains below 0.5 W.

The filter attenuates noise by more than 10 dB between 2 and 100 MHz, the range where most domestic electromagnetic interference occurs.

Technical Specifications

Electrical specifications

• Power supply: 230–240 V ~ 50 / 60 Hz
• Maximum total load: 14 A / 3220 W
• Self-consumption: less than or equal to 0.5 W with no device connected

Filtering and protection

• Noise filtering: better than -10 dB in the 2–100 MHz range
• Surge protection
  • Maximum surge current: 4500 A in a single 8 / 20 µs pulse
  • Maximum peak voltage: 3000 V for 10 ms
  • Maximum clamping voltage: 775 V for an 8 / 20 µs pulse

Connectivity

• 4 direct Schuko outlets
  • Including 2 equipped with a DC blocker
• 4 filtered Schuko outlets
  • All equipped with a built-in DC blocker
• Removable IEC power cable with upgrade option to an audiophile cable

Advanced features

• Built-in phase detector
• Polarity inversion switch
• Front-panel voltage indicator
• Surge protection

Built-in DC blocker

The built-in DC blocker treats the DC component present on the power grid, which can cause transformer saturation and generate vibrations and mechanical noise.

Advantages of the DC blocker

• Elimination or reduction of unwanted DC component
• Reduction of transformer hum
• Lower operating temperature
• Improved overall system stability

Dimensions and weight

• Dimensions: 13 × 14 × 43 cm (height × width × depth)
• Weight: 4.2 kg

Why use a mains filter

• Significant reduction of mains noise
• Improved sound quality
• Cleaner, more detailed sound
• Significant reduction in hum
• Quieter, more stable operation
• Reduced transformer heating
• Enhanced surge protection
• Increased longevity of connected devices
• Longer service life for equipment