Fidelix TruPhase Passive attenuator with selector

True Phase
The name TruPhase comes from the word "True Phase", which allows you to adjust the absolute phase instantaneously. Many recordings have this absolute phase, but depending on the time of recording, the record company, and the recording engineer, the opposite is true. For those who are sensitive to this difference, it is natural to want to listen to them all. This TruPhase has made it possible to respond to such requests with a toggle switch.

The principle of this reversal is to turn over XLR terminals No. 2 and No. 3, and this function is the first feature of this unit. It is equipped with a phase reversal switch that can be switched instantaneously when playing back playback devices with balanced outputs with different phases, such as No. 2 and No. 3 hot, or records recorded with the phase reversed.

Passive attenuator with 21-contact rotary switch
A 21-contact rotary switch switches 20 high-quality sound resistors made by PRP in the United States to improve sound quality. Set the clock at 2 o'clock as standardIt is easy to make detailed adjustments, and the sound quality of the silence is also improved. It uses a 20 KΩ specification, a completely passive professional specification with approximately 2 dB steps.

The selector switch uses 8 circuits and 5 contacts, completely separating the ground
The general selector has the same ground and selects only the signal, but it is completely disconnected with an 8-circuit, 5-contact switch to switch the ground.
It is already well known that the sound of a power supply changes depending on the polarity. This is due to the harmful effect of current flowing through the ground, but to eliminate this, it is necessary not to connect the ground. In order to free from the adverse effects of the ground current caused by the power supply, TruPhase disconnects the equipment that is not in use, including the ground of the signal wires, and is the culmination of the antithesis to the preamplifier based on Fidelicx's experience. However, in Europe and the United States, it is necessary to take a power supply ground from the viewpoint of preventing electric shock.

For a vast sense of realism, even the left and right grounds are completely independent. The silicon diode is connected in the opposite direction for protection, but in the unlikely event of a problem, it can be completely connected with a dip switch.

In addition, if you want to connect more devices, we recommend adding another passive input selector or TruPhase. The XLR output can be phase-reversed, outputting both XLR and RCA inputs. On the other hand, the RCA output cannot be phase reversed and does not output the XLR input. We have invested know-how in details such as minimization of circuit loops, vibration mode countermeasures, and the absorption effect of electromagnetic waves. Mogami Electric Wire's oxygen-free copper and polyethylene coated wire are adopted.

* When the input is switched, noise is generated because the hot and ground are momentarily separated at the same time. The general selector has the same ground and selects only the signal, but because it is designed with an emphasis on sound quality, the ground is also switched at the same time, so it is completely disconnected with an 8-circuit 5-contact switch, so there is a "click" noise when switching inputs.
* Please note that it is necessary to lower the volume of the power amplifier or turn off the power.