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發表於 2016-10-22 23:18:29
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To check whether your system is suitable to use a passive preamp, you can use the following equation:
Voltage Gain (Av) = 20 * Log (Vout/Vin)
Vin is input voltage required to drive your power amplifier to max power.
More info here
Basically, if the output voltage of your source is greater than the min voltage required to drive the power amplifier to max power, then you may benefit from a passive preamp cos there is already too much gain in your system.
The beauty of a TVC preamp is as you lower the volume on the preamp, the output impedance of the preamp goes down as well. On the other hand, if you turn the volume to unity, the output impedance of the TVC preamp will be the same as your source.
Finally, TVC preamps are really good for ppl who has too much gain in their system already, hence no need for active preamps and like to listen in low volumes.
The first time I had my Classic V2 plugged in and playing at modest level, I could not believe how much more details I was listening.
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