Mark-levinson Reference Preamplifier N32 Manual de usuario

Nº32ReferencePhono ModulesOwner’s ManualMadrigal Audio LaboratoriesR

10UnpackingWarning! Do not attempt to use your Nº32 Reference Phonomodules unless your Nº32 Controller is using version1.03 (or greater) of its operat

11Operating VoltageThe Nº32 Reference Preamplifier is set at the factory (internally) for100V, 120V, 230V, 220V, or 240V AC mains operation @ 50 or 60

12Installing the Nº32 ReferencePhono Preamplifier ModulesImportant! Installation of the Nº32 Reference Phono PreampllifierModules should be done by a

13material needed The following materials and tools are needed to perform the installa-tion of the Nº32 Phono modules into the Nº32 Preamplifier:1 – N

143. Remove the two screws from rear bottom of Nº32 Preampli-fier top cover that hold it in place (using the 3⁄32” hex keysupplied with the Nº32).Thes

155. Peel off the protective film covering the copper strip on theend of the wrist strap, and attach it so that the copper stripcontacts the chassis o

16this , not Warning: The cables must lie flat against phono preamp topcover to slide in to Nº32 preamp.8. Gently slide the left phono preamp mod

1711. Carefully lift connector ends of cables out of holes in phonopreamp top cover.Being careful to avoid catching the connectors on the edges of the

18(closeup)13. Remove your ESD wrist strap from the chassi and from yourwrist.It would hinder your replacing the top cover, next.14. Replace Nº32 prea

19Customizing Your Nº32setup overview The Nº32 Preamplifier has many provisions for custom-tailoring thesystem’s operation to match your preferences.

CAUTIONRISK OF ELECTRIC SHOCKDO NOT OPENCAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DONOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE.REFER S

20Set Phono 1Name= PH/MC 1Ph Gain= +60Gain= +12 dBOffset= 0.0Bal= <-0.0->20Hz HPF=ONR Load=100C Load=.01uFSet Phono 2Name= PH/MM 2Ph Gain= +40G

21between the output level of a given source and thepreamplifier’s gain structure.• Offset— automatic volume adjustments implementedwhenever switching

22The Ph Gain selection should be made prior to the gain adjustmentoutlined below, as appropriate for your cartridge type. Otherwise youmay end up att

23setting the balance The balance (Bal) setting is unique to the phono preamplifier, andshould be used to compensate for the small imbalances found in

24setting thecapacitive loadC Load refers to the capacitive load the phono preamplifier presents tothe cartridge. (Of course, any capacitance in the p

25Installing a Custom LoadA pair of gold plated screw terminals is available inside each of theNº32 phono preamplifier modules. It may be used to inst

261. Lift connector end of cable out of hole in shield box ifneeded.2. Using the 5⁄64" hex driver, remove four button head screwsfrom top cover o

275. Loosen each gold thumb screw a few turns.You do not have to remove the thumbscrews—just loosen themenough to slide the leads of your resistor in

289. Guide cables through holes and replace top cover.10. Re-install top cover screws.Be careful not to cross thread these relatively small screws.11.

29Care and MaintenanceTo remove dust from the external cabinet of the Nº32, use a featherduster. To remove dirt and fingerprints, we recommend isoprop

Important Safety InstructionsPlease read all instructions and precautions carefully and completely before operating your MarkLevinson® preamplifier.1.

30U.S. and Canadian Warranty90-day limited warranty This Mark Levinson® product is warranted to be free from defects inmaterial and workmanship under

31Obtaining ServiceWe take␣ great pride in our dealers. Experience, dedication, and integritymake these professionals ideally suited to assist with ou

32SpecificationsThe correlation between published specifications and sonic quality is unreliable. A listof numbers reveals virtually nothing. All tech

33Installation Notes

630357 © 3/1999 Madrigal Audio Laboratories, Inc. All rights reserved. Printed in U.S.A.is a registered trademark of Madrigal Audio Laboratories, Inc.

4From all of us at Madrigal Audio Laboratories, thank you for choosing the MarkLevinson Nº32 Reference Phono Preamplifier Modules.A great deal of effo

5Table of ContentsSpecial Design Features of the Nº32 Reference Preamplifier ... 6modular approach ...

6Special Design Features of theNº32 Reference Preamplifiermodular approach The Nº32 Reference Preamplifier and Reference Phono PreamplifierModules wer

7tion, optional custom termination is provided via a pair of gold-platedterminal posts within each phono module. No soldering is necessarywhen using t

8able from our balanced circuitry by including a balanced XLR inputconnector version of the phono preamplifier modules.123NC123NCLEFT +LEFT -TONE ARM

9width and open loop gain to provide uncompromised performanceeven at the 60db of gain required by a moving coil preamplifier. Theinstrumentation ampl