2
Nagra –
VPA
Table of contents
Security warnings ....................................................................... 3
Warranty ................................................................................... 3
Congratulations .......................................................................... 4
Package contents ....................................................................... 4
Setting-up the amplifiers ............................................................... 5
Installation of the feet ................................................................ 5
Installation of the tubes .............................................................. 6
Installation of the tube protections ............................................... 7
VPA connections ......................................................................... 8
Connecting the VPA to the source ................................................. 8
Connecting the loudspeakers ....................................................... 8
Connecting the AC mains power ................................................... 9
Operation
.................................................................................... 10
The main selector ..................................................................... 10
Selecting the correct speaker impedance ..................................... 11
Tube ageing and replacement .................................................... 12
Tube compatibility .................................................................... 12
Tube bias adjustment ............................................................... 12
Technical specifications ............................................................. 13
Declaration of conformity ............................................................. 14