Fidelix TruPhase Passive Attenuator with Selector
Product code: truphaseFidelix TruPhase Passive Attenuator with Selector
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Absolute phase can be matched instantly
Passive attenuator using a 21-contact rotary switch
Fidelix TruPhaseis a passive attenuator that pursues sound quality, and as its name suggests, its biggest feature is its focus on "True Phase".
[Phase reversal switch] Although the absolute phase of many recordings matches, there are cases where the absolute phase is the opposite depending on the time of recording and the engineer. TruPhase uses the principle of flipping XLR terminals 2 and 3.phase reversal switchEquipped with a toggle switch. When playing a sound source that was recorded with the phase reversed or a playback device with a balanced output that has a different phase, you can instantly match the phase and listen to it.
Professional grade passive attenuator with 21 contacts
Thorough attention to the volume adjustment sectionHigh-FidelityConsideration has been given to
- High-FidelityResistance: High-precision non-magnetic type made by PRP in the United States using a 21-contact rotary switch.High-FidelitySwitch the resistance (20KΩ specification, approximately 2dB steps)**.
- Minimization of interlocking errors: The attenuator resistor uses a high-precision non-magnetic type made by PRP, an American company with a proven track record, and the interlocking error is extremely small. All switches and connector contacts are gold-plated to minimize sound quality deterioration.
- Circuit considerations: We put our know-how into details such as minimizing circuit loops, vibration mode countermeasures, and electromagnetic wave absorption effects. The wiring uses Mogami Electric Wire's oxygen-free copper and polyethylene-coated wire.
A selector that completely separates the ground and the “antithesis of a preamplifier”
TruPhase's core philosophy is freedom from the negative effects of ground currents caused by power supplies that degrade sound quality. This is the culmination of a design based on Fidelix's experience that can be called the **antithesis** of preamplifiers.
- 8 circuit 5 contact selector: While general selectors share a common ground, this unit uses a switch with 8 circuits and 5 contacts. Completely disconnect the signal wires of unused equipment, including the ground.
- Vast immersion: Freed from the negative effects of earth current, and even the left and right earths are completely independent, reproducing a vast sense of realism.
[Precautions for use] Because it is designed with an emphasis on sound quality, a clicking noise will occur when switching inputs. This is because a switch with 8 circuits and 5 contacts is used to completely disconnect the ground so that it can be switched at the same time. Please note that when switching, it is necessary to lower the volume of the power amplifier or turn off the power.
| power supply | Unnecessary |
|---|---|
| input | XLRx2 systems, RCAx3 systems |
| dimensions | (W)200x(H)50x(D)200mm (dimensions excluding protrusions) |
| input impedance | 20KΩ |
| Output impedance | Maximum approximately 5KΩ (when connecting signal equipment) |
| weight | 1.05Kg |
Overwhelming silence and the importance of phase switching
Reviews on the web praise the extremely quiet nature of this ground isolation design.
“The sound background becomes surprisingly quiet, and the clarity is so clear that you forget the preamp is there.”
The purity of the signal path and complete isolation of ground dramatically improves the system's signal-to-noise ratio. The background of the sound becomes quiet, like deep darkness, and even the smallest information is brought out clearly.
"Clarification of sound image and sinking of low frequencies through phase inversion."
By switching the phase switch, the sound image is perfectly defined and the low range sinks deeper, an experience that has been described as shocking. Its effectiveness has been acclaimed as an essential feature for listening to the ``true sound'' of sound sources whose phase has been reversed due to recording.
