PNA-USB01 Overview
Function and Basic Concept
The PNA-USB01 is a USB-based conditioner designed to absorb high-frequency noise from digital circuits, microcontrollers, and switching power supplies. By connecting it to a USB port, it enhances the original music and video signals, resulting in a smoother and clearer output.
Technical Content
Noise Absorption: Utilizes a series circuit of resistors and capacitors to absorb noise from the USB power supply.
Electromagnetic Wave Absorption: Equipped with Parshut, an electromagnetic wave absorbing sheet, to reduce conducted noise from internal circuits.
Low Impedance Metal Case: The metal casing absorbs high-frequency noise and enhances the virtual ground (GND) effect.
Sound Quality Impact
By reducing internal high-frequency noise, the PNA-USB01 improves the signal-to-noise ratio, allowing previously obscured sounds to emerge. This results in improved freshness, resolution, clarity in high frequencies, and extension in low frequencies. The overall effect is a three-dimensional, expansive sound field. The degree of these effects can vary depending on the environment.
Specific improvements include:
Enhanced S/N ratio
More powerful low frequencies
Clearer vocals
Richer three-dimensional sound
Better sound separation from speakers
Special Features
Pure Audio Design with Non-Magnetic Components
USB Connector: Made by Würth Elektronik, featuring a non-magnetic brass shield with nickel plating.
Aluminum Case: Constructed from A6061/Al-Mg-Si alloy.
Screws: Made of SUS304 non-magnetic stainless steel (though slightly magnetic post-manufacturing).
Selection and Testing of Components
Capacitors and resistors were carefully selected and tested for optimal sound quality. The PNA-USB01 employs high-precision components, such as LCR Audio polystyrene capacitors with low ESR and Amtrans carbon film resistors with special gold-plated OFC wire.
Construction
Air Wiring: Handcrafted without printed circuit boards to avoid sound quality degradation.
Lead-Free Solder: Contains silver, chosen based on listening tests.
EM Wave Absorbing Materials: Asahi Kasei Palshut, selected for its non-magnetic properties and effectiveness in reducing high-frequency noise.
Design Philosophy
The PNA series is designed to reduce noise while preserving the "lifelike vitality" of the equipment and sound sources. Unlike other noise-reducing accessories that might dull the sound, the PNA-USB01 maintains the energy, flexibility, and soul of the music by carefully targeting high-frequency noise detrimental to sound quality. All design choices are validated through extensive listening tests to ensure optimal performance without compromising the audio experience.