Two high-quality buffers.
First buffer is based on Discrete Class-A
Second buffer is based on Low-Noise Op-Amp
Prevents the loss of signal level, high frequency and low end punch
that is caused by impedance mismatch and cable capacitance
Some Fuzz or Wah pedals doní»t like to be fed with a buffered signal.
For this reason, the first buffer can to be bypassed.
You can avoid Ground Hum/Noise that may occur when two buffers
are used for different signal routing, because the second buffer is
supplied with fully isolated power.