I checked ex-owner's bais setting when MUTE mode and found that the red arrows are below the green zone. Therefore, I moved red arrow to the middle of the green zone in accordance with Kleech's instruction on the above. And then, I moved speaker cables to 4 ohm taps from 8 ohm taps and connected Discovery Essence XLR interconnects between Nagra PL-L and VPA.
The result was very impressive, my disappointment for the VPAs was almost disapear and I could listen my favorate Keith Jarret Trio and Casandra Wilson with satisfactroy. Thanks for your help ~~~
[p.s] To Kleech, I have one more question that what is the role about the rest two holes on the middle of left side of the amps. And have you ever changed input tubes (E182CC and/or ECC83) to the famous NOS TFK, Mullard, Amperex, etc ?
The result was very impressive, my disappointment for the VPAs was almost disapear and I could listen my favorate Keith Jarret Trio and Casandra Wilson with satisfactroy. Thanks for your help ~~~
[p.s] To Kleech, I have one more question that what is the role about the rest two holes on the middle of left side of the amps. And have you ever changed input tubes (E182CC and/or ECC83) to the famous NOS TFK, Mullard, Amperex, etc ?