Using Britain transformer power, Denmark JENSEN capacitors and Stepping potentiometer.(Hifi exquis 1101017)
Passive preamp is a relatively new design, it does not use a power supply, that is the main difference between traditionnal preamp and passive preamp.
For passive preamp, the audio signal passe signal selection switch, directly enter in Volume potentiometer, after the attenuation of potentiometer, it drive power amplifier directly. (Hifi exquis 1101017)
The benefits of passive preamp is that it can eliminate the interference of radio waves and wireless electromagnetic induction fundamentally.
The passive preamp can improve the sound of CDs and stage, so the sound quality becomes more pure, audio becomes more coherent, more supple, more warmth.
The treble is elegant, the sound is full of 3D sense, the sound field is expanded. it is full of sence of stage. (Hifi exquis 1101017)
High SNR- Because no power supply, it has not interference source from iteself, thicker chassis cover cattle can eliminate electromagnetic interference from outside.Even compared with the higher performant preamp and transistor in listening to the music, the former backgroup music is more silent, it is the best choice for the hifi Enthusiasts for seeking a hign SNR.The sense of hearing is much better than indicators.
From the point of the frequency response test indicators,this passive preamp is not as well as the active preamp, but if we compare this two preamps in audiovisual, we can find the passive preamp is more delicat and transparent, it has not visible sound pollution and personality, to make music more natural. (Hifi exquis 1101017)
There are not the indicator changes caused by aging electronic compoents for this reliable passive preamp.The accuracy and the indicators will be changed with the use of the timeor number of years, there was also no maintenance problems.On the contrary, the material of the Sound pressure transformer of this passive preamp needs requires a period of time of burin in and the natural aging process, the sound will be better. (Hifi exquis 1101017)