Related Manuals for Nagra MPA
Summary of Contents for Nagra MPA
- Page 1 Nagra MPA Amplifier Owner’s Handbook Nagravision S.A. Kudelski Group CH-1033 Cheseaux, Switzerland All rights reserved – © November 2002 KSA P/N 2055 005 151...
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Page 2: Table Of Contents
SETTING UP YOUR MPA AMPLIFIER ..................6 CONTENTS OF THE BOX..................... 6 SELECTING THE VERTICAL OR HORIZONTAL POSITION ..........6 FITTING THE FEET ....................... 6 CONNECTING THE MPA TO THE SOURCE PREAMPLIFIER..........7 CONNECTING THE LOUDSPEAKERS ................7 BRIDGING POSSIBILITY....................... 8 Serial........................... 8 Parallel .......................... -
Page 3: Important Safety Warnings
FORM OF USER NEGLIGENCE. SAFETY In the event that the case of the MPA is opened the AC mains power must be disconnected. However it should be remembered that the high voltage capacitors in the amplifier power supply will remain charged for several minutes, even though each of them is equipped with a... -
Page 4: Warranty
WARRANTY NAGRAVISION certifies that this instrument was thoroughly inspected and tested prior to leaving our 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 one year from the date of delivery to the user. -
Page 5: Congratulations
Numerous awards have been bestowed upon Nagra for its technical innovation, excellence in design and flawless construction. In building the MPA amplifier, significant effort has been focused on building a product that is robust, easy to use and with sonic properties that will delight even the most demanding and critical audiophile. -
Page 6: Setting Up Your Mpa Amplifier
SETTING UP YOUR MPA AMPLIFIER CONTENTS OF THE BOX Your MPA amplifier system should contain the following: MPA amplifier stereo block unit in its own box with its serial number printed on the outside. Box containing the following: 1 x Set of Measurement protocol... -
Page 7: Connecting The Mpa To The Source Preamplifier
Connect the source preamplifier to the 3-pole XLR balanced input connectors left and right channel (“A” if no RCMI option) on the rear panel of the MPA. If necessary, use the XLR/RCA adapter connector supplied to connect an unbalanced RCA lead to the XLR connector. -
Page 8: Bridging Possibility
BRIDGING POSSIBILITY. The MPA can be used as a mono power amplifier. Two ways are existing to connect the single loudspeaker. Both amplifier channels can be connected in serial or parallel way. Serial Put the stereo switch to the position “BRIDGED SERIAL”. -
Page 9: Switching On
PFC’s inside the machine. SWITCHING OFF. Always switch “OFF” the MPA by the front “OFF” button. Switching “OFF” by the main switch on the back panel will created a loud “pop” in the loudspeakers and the internal capacitors will... -
Page 10: Without Rcmi Option
If it is needed to set the potentiometer outside the fat scale range to obtain 0 dB on the modulometer, the input stages of the MPA could be saturated. In this case, to adapt the input level, external passive attenuators should be installed. - Page 11 THE POWER METER (RCMI option only) The power meter has a ballistic identical to that of a modulometer. It shows the peak value of the signal. The upper scale shows the input level up to +3 dB The lower scale shows the output power up to 250 W 0 dB indication corresponds to 200 W if the speakers are 8 Ohm.
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Page 12: Rear Panel
REAR PANEL INPUT CONNECTORS For an MPA without RCMI option, only the input “A” can be used, “B,C & D” are not connected. For an MPA with RCMI option all four inputs can be selected from the front panel. If the MPA is used in the bridged mode, only the left inputs can be used. -
Page 13: Remote Control
& F are not used for the MPA. The main power switch at the backside of the MPA must be in the ON position. It is not possible to select an other line input if the MPA is muted. ON & OFF... -
Page 14: Battery Installation
Product number for the remote receiver Remove the front panel as described in “SETTING UP YOUR MPA AMPLIFIER”. The remote receiver board sits at the backside of the front panel. Locate the 5 jumpers “ST1”. The MPA is factory set to work as product number “1”... -
Page 15: Power Supply
POWER SUPPLY Starting from the 1 of January 2000, all equipment connected to public AC mains power networks and incapable of drawing less than 40 W, MUST be equipped with the aforementioned mysterious PFC. Well, our “new-born” is very power thirsty; in fact he needs no less than 800 Watts in order to express himself with full thrust! The PFC (Power Factor Corrector) is an indispensable accessory allowing all electrical equipment to behave, with respect to the AC-power network, as a pure resistance and hence... - Page 16 The MPA is equipped with one PFC per channel. Each PFC supports up to 500 W. The MPA is fitted with two AC mains power fuses which are installed in the holder to the right of the AC mains power switch on the rear panel. As a security measure, two fuses are provided, one is on the Live line of the supply and the second is in the Neutral line.
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Page 17: Signal Input
1 and 3 inside the three pin XLR connector which plugs into the MPA, and the signal is then placed on pin 2 and the screen to the bridged 1+3. Adapters which do this are readily available on the market (Neutrik for example) and such connectors have a female RCA connector on one end and a male XLR on the other end. -
Page 18: Output Stage
This happens also if the MPA is switched on without the speakers connected. In one of the above cases, switch off the MPA by the main switch at the backside and wait for approximately 30 seconds until the internal led is turned off. Verify that the speakers are correctly connected and switch on the MPA. - Page 19 Attention: Do never install the MPA without feet. In this case the cooling will not work correctly and the amplifier could be damaged due to high internal temperature.
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Page 20: Technical Specifications
TECHNICAL SPECIFICATIONS AUDIO PERFORMANCE Input sensitivity: 1V for 200 W Input Impedance: >100 kOhms Output Power: Max 250 W on 8 Ohms POWERING 94Vac to 135Vac & 186Vac to 264Vac Maximum power input 830 W PHYSICAL ASPECTS Dimensions (L x W x H) = 410mm x 135mm x 435mm (16¼”... -
Page 21: Safety/Compliance
ème Cheseaux 4 quarter 2001 NAGRA, KUDELSKI are registered trademarks, property of KUDELSKI S.A., CHESEAUX SWITZERLAND. All specifications contained in this publication are subject to change at any time without prior notice following improvements and or modifications of the equipment.