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The Filter 3-P is an innovative solution developed to address the issue of propagated conducted electromagnetic interference, which can significantly impact the performance of hi-fi systems. It operates directly along the analog signal cabling path, effectively minimizing interference and ensuring optimal sound quality for audio enthusiasts. With digital signal processing taking the forefront in modern hi-fi equipment, the transition from classic CD players to digital and internet-based audio sources necessitates numerous signal connections. This evolution includes a blend of digital and analog connections, in addition to various network connections within the household.

In contemporary homes, numerous devices equipped with switching power supplies, such as LED systems, laptops, and solar systems, alongside those with wireless controls like WLAN, all emit interference signals. These unwelcome signals can degrade the performance of audio systems, adversely affecting sound quality. The Filter 3-P serves as a robust countermeasure to these challenges, ensuring clear and pristine audio output.

The basic model of the Filter 3-P is available in black and offers the option of RCA or XLR connections, providing flexibility for various audio setups. The unit measures 186 mm in length, 70 mm in width, and 75 mm in height, with a weight of 3.6 kg, making it a manageable addition to any audio system.

A standout feature of the Filter 3-P is its separable ground, which enhances its versatility and effectiveness. In terms of technical specifications, it boasts a frequency range of 10 Hz to 150 kHz, with total harmonic distortion (THD + N) of less than 0.001% at 1 kHz, ensuring minimal interference with the audio signal. The common-mode rejection ratio (CMRR) exceeds 80 dB at 10 kHz, further highlighting its capability in mitigating interference.

In a review by Audio Swiss in April 2019, Andreas Eichelsdörfer highlighted the significant impact the Filter 3-P has on audio performance, noting how its absence is immediately noticeable. Such feedback underscores the Filter 3-P's role as a crucial accessory for audiophiles seeking uncompromised sound quality from their hi-fi systems.

Filter 3-P

by Octave

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