Related Manuals for Nagra VPA
Summary of Contents for Nagra VPA
- Page 1 Ultimate 845 amplifiers Instruction manual P/N: 2055008151 – – © ©...
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Page 2: Table Of Contents
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 .............. -
Page 3: Security Warnings
• The Nagra VPA is designed to be used indoor only; • The Nagra VPA runs very hot, install it in a safe place to avoid any risk of injury, especially with children and domestic pets; • Should you need to ship or transport your amplifier, always use the original packing supplied by Nagra. -
Page 4: Congratulations
Congratulations Congratulations, you have just purchased one of the best amplifiers ever made! The VPA were created by an engineering team with more than 60 years of experience designing world-class products for the professional audio, national security and military businesses. -
Page 5: Setting-Up The Amplifiers
Setting-up the amplifier Installation of the feet The VPA needs to stand on its feet to be stable, please install them. Turn each of the two VPA mono blocks on their side on the edge of a table. Step 1... -
Page 6: Installation Of The Tubes
Please use the gloves provided; they are custom made for Nagra using state of the art “Haute Horlogerie” micro-fiber fabric. Each VPA has its own set of tubes with a serial number written on the socket. Each tube is also marked “FRONT” or “REAR” which indicates the correct location for the tube on the particular amplifier. -
Page 7: Installation Of The Tube Protections
Gently slide the tube protection down. Make sure the screw holes are placed above those of the VPA. Using the hex screwdriver provided put the screws back in place... -
Page 8: Vpa Connections
Ground connector (ask your dealer how to use it) Voltage selector Mains switch and IEC connector Connecting the VPA to the source Connect the source preamplifier to the XLR balanced input or the RCA connector. The white jumper allows you to select either XLR... -
Page 9: Connecting The Loudspeakers
Connecting the loudspeakers On the rear of each VPA mono block there are four gold plated WBT loudspeaker terminals. The loudspeaker cables should be connected between the right-most terminal marked “LO” for and the correct terminal according to the impedance stated by the manufacturer of the loudspeaker for the Should you have any doubt about your speaker’s impedance, start with... -
Page 10: Operation
To prevent tube ageing, it is better leave the amplifier on for longer periods rather than turning it on and off several times a day. For more information on tube ageing and replacement, refer to Tube ageing and replacement on page 12. Nagra –... -
Page 11: Selecting The Correct Speaker Impedance
Start by verifying the nominal impedance of your loudspeakers, either from their technical specifications or on the rear of the speaker. Then connect the “+ve” speaker cable to the correct terminal on the VPA. The modulometer features two pointers, the red pointer indicates the peak cathode current and the black pointer indicates the peak anode voltage of the output tube. -
Page 12: Tube Ageing And Replacement
100% performance out of your amplifiers. Tube compatibility Nagra selected 845 tubes go through a rigorous selection: 24 hour burn-in, individual measurement and selection and are paired using a Nagra unique process. Using 845 from other suppliers will void warranty. -
Page 13: Technical Specifications
Technical specifications The following table shows the general specifications for all Nagra VPA amplifiers. Your personal amplifier’s measurements are provided on the accompanying "measurement protocol" document. Type Pure class A Tube type Output power 50 W rms Input impedance > 100 k Ohms... -
Page 14: Declaration Of Conformity
Although this equipment conforms to the stated norms, under certain exceptional circumstances it may provoke interference. In this event the user may be asked to take appropriate measures. Other electrical regulatory certification pending. Cheseaux trimestre 2000 Cheseaux quarter 2000 Nagra –...