SATRI Circuit Laboratory FIL-3102 Digital Noise Reduction RF Filter

Thoroughly removes harmful digital signals, dramatically improving clear, natural playback and sound imaging.

The new digital noise reduction filter FIL-3102 from SATRI Circuit Laboratory (formerly Bakoon Products) is a model that significantly enhances the performance of the popular previous model FIL-3101.

Fundamental solution to digital noise

PCs, smartphones, and digital music players mix not only audio signals but also harmful digital signals, which muddle the sound. By placing FIL-3102 between the source and the amplifier, you can achieve the following effects:

• Cutting digital signals: Only audio signals are passed through, and harmful digital signals are thoroughly cut.
• Eliminating sound muddiness: By removing noise, there is no muddiness, resulting in clear and natural sound.
• Performance improvement: When connected between the player and amplifier, sound accuracy and imaging are significantly improved.

Connection and compatibility

• Optimal devices: Ideal for smartphones, tablets, PCs, and digital players.
• Connection: Connect between the output of the player and the input of the amplifier.
• Note on compatibility: Due to its low impedance characteristics, it cannot be used with tube amplifiers, but it is highly effective with other solid-state amplifiers.

Consideration for health

FIL-3102 is also designed to prevent high-frequency digital signals from interfering with the brain, which could potentially affect health.

Dramatically improves high-resolution audio sources as well

This device dramatically improves the sound quality of downloaded high-resolution audio. Measurements with a spectrum analyzer also show that inserting the FIL-3102 results in beautifully flat frequency lines with no noise.

A subtle effect that suppresses digital harshness

When you add the FIL-3102 to your system, the first noticeable change is that the sound becomes quieter. High-frequency noise from USB and digital devices is organized, and the background unrest fades away. It doesn't dramatically alter the tonal character but instead works to remove the hardness and roughness typical of digital sound.

Sharper sound imaging and better clarity

With less noise, the contours of the sound image naturally tighten. The edges are not emphasized, but there’s a feeling that the focus is clearer. Especially with vocals and acoustic instruments, the attack and decay of sounds are well organized, giving an impression of smoother musical flow.

Improved S/N ratio and reproduction of subtle sounds

The effect of the FIL-3102 is more noticeable at low volume or in quiet passages. With a quieter background, the nuances of hall tones, reverberation, and soft sounds emerge. As a result, it may feel like there’s more information, but in reality, it’s an improvement that allows previously buried sounds to be heard.

Good compatibility with SATRI devices

When paired with equipment from SATRI Circuit Laboratory, it impressively reduces noise without compromising circuit transparency or speed. The sound doesn’t become muffled or dull, and the characteristic agility of SATRI circuits is preserved.

An accessory that lays the foundation for digital playback

The FIL-3102 is not a device that dramatically changes the sound from DACs or digital inputs, but it elevates the overall system performance. It suppresses the noise that is often noticeable in PC audio and network playback, providing an analog-like calmness and clarity. It can be called a reliable RF filter.