Nagra NAGRA PSA Operating Manual Download Page 2

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Nagra -

Pyramid Monoblock Amplifier

Table of contents

Important safety warnings

Warranty 3

Congratulations 4

Package content

Installation

Placement of the Pyramid

Installing the fuse

Connecting the loudspeakers

Connecting and selecting the input

Using the ground connector

Connecting the AC mains power

Operating the PMA

Power switches

Level and clipping indication

Security 12

Protection mode

Clipping protection

Shortcut protection

DC protection

Thermal protection

Technical specifications

Nagra Hi-Fi range

Summary of Contents for NAGRA PSA

Page 1: ... ri ig gh ht ts s r re es se er rv ve ed d J Ja an nu ua ar ry y 2 20 00 05 5 Pyramid Monoblock Amplifier Operating manual Nagra is a division of the Kudelski Group Route de Genève 22 1033 Cheseaux Switzerland www nagraaudio com ...

Page 2: ...ing the fuse 6 Connecting the loudspeakers 7 Connecting and selecting the input 8 Using the ground connector 9 Connecting the AC mains power 9 Operating the PMA 10 Power switches 10 Level and clipping indication 11 Security 12 Protection mode 12 Clipping protection 12 Shortcut protection 12 DC protection 12 Thermal protection 13 Technical specifications 14 Nagra Hi Fi range 15 ...

Page 3: ...nce Warranty Nagra a division of Nagravision SA certifies that this instrument was thoroughly inspected and tested prior to leaving its factory and is in accordance with the data given in the accompanying measurement protocol and test sheet We warrant the products of our own manufacture against any defect arising from faulty manufacture for a period of three years from the date of delivery to the ...

Page 4: ...e hi fi products and field recorders are developed by the same R D Department Nagra philosophy is to provide innovation and technology in order to design high quality products The hi fi range was created to implement innovative designs and provide Nagra expertise to a new field The PMA features a new Nagra custom switching power supply Since many years Nagra recorders have been equipped with switc...

Page 5: ...monoblocks each box should contain the following AC power cable Set of fuses for 100 120 or 220 250 V depending on your country Measurement protocol this is the actual electrical measurement of your amplifier If anything is missing please contact your dealer depending on your country the AC mains cable features either bare wired US European or Swiss plug ...

Page 6: ...visable to place the Pyramids on small stands to allow an optimal thermal dissipation Installing the fuse You should start by installing the fuse Apply a pressure with your thumb to release the fuse compartment Each monoblock comes with a set of 5 or 10A fuses Make sure the supplied fuses have the correct value refer to the following table In the event that the fuses don t have the correct value p...

Page 7: ...ing gold plated WBT speaker s connectors It allows connecting Bare wire cables ends up to 4 2mm 6 35mm spade lug 4 mm banana plug The Pyramid features isolated connectors to comply with security regulations Connecting bare wire cable ends or spade lugs Connecting cables equipped with banana plugs ...

Page 8: ...signals If you intend to use the balanced input place the jumper on the Bal position as shown on the picture If you have an unbalanced source place the jumper on the unbal position You can then connect a cable on either the RCA or XLR input When using an unbalanced source you should place the jumper in this position ...

Page 9: ...ed specialist The ground connector can accommodate either banana or bare wire cable Connecting the AC mains power Before connecting the power cable make sure the PMA is in the OFF position Then simply plug the PMA to the mains by the means of the supplied AC power cable Tip Both PMAs should be connected to the same wall outlet if not to the same AC line phase ...

Page 10: ... its power consumption is zero In the I position it allows the operating switch b to control the unit The Operating Switch b has 3 positions ON AUTO OFF ON The unit turns ON after a short heating and self control period AUTO The PMA turns ON and OFF automatically in the presence of an audio signal on the inputs OFF Standby position Mains switch a Operating switch b Action O Any The unit is complet...

Page 11: ...evel LED Located on the left It indicates the level of the signal The brightness of the LED is directly proportional to the level of the signal If you don t want this blue LED to operate you can easily turn it off The ON OFF switch for the LED is located under the Pyramid s chassis Caution Start by turning the main switch a OFF O position and unplug the mains connector Turn the pyramid upside down...

Page 12: ...you push the pyramid to its limit the front red LED will start to blink While a short clip will not even be heard a long clip can damage the amplifier or the loudspeakers That s why after one second of continuous clipping the PMA will self protect by going into the Protection Mode Short circuit protection In the event of a short circuit on the speaker s connectors the front red LED will light up a...

Page 13: ...high levels even in the most demanding conditions Still Nagra engineers willing to maximize security have integrated a heating management system In the event of overheating body of the Pyramid going higher than 60 C 140 F the PMA will turn OFF The OVER HEAT LED on the back panel will light on The PMA will automatically turn on again as soon as the temperature goes down below 60 C ...

Page 14: ...e disengaged Clipping indication Red LED on front panel I 12A or U 60V Automatic start For input level 100mV Overheating Above 60 C 140 F Protection Deactivates the amplifier Alarm LED on the back panel DC protection for loudspeakers Above 2 5 V DC Output connectors Isolated gold plated WBT Bare wires up to 4 2 mm 4mm banana plugs 6 35mm spade lugs Consumption per monoblock 350 W max Sine wave cur...

Page 15: ...rding engineers around the world PL L Line vacuum tube preamplifier The PL L is a Pure Class A vacuum tube line preamplifier based on the proven design concepts of the world renowned PL P The PL L is designed to provide the highest quality audio performance in an ultra high resolution audio system PL P Battery operated tube preamplifier with phono stage The PL P is a Pure Class A vacuum tube pre a...

Page 16: ...amps électromagnétiques EN 61000 4 3 Immunity to electromagnetic fields EN 61000 4 3 Immunité aux décharges électrostatiques EN 61000 4 2 Immunity to electrostatic discharges EN 61000 4 2 Immunité aux transitoires électriques rapides en salves sur câble d alimentation EN 61000 4 4 level 2 1000V Immunity to burst on mains line EN 61000 4 4 level 2 1000V Immunité aux aux transitoires électriques rap...

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