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Owner’s Manual
Nº32
Reference
Phono Modules
R
Madrigal Audio Laboratories
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WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRICAL SHOCK, DO NOT REMOVE COVER. NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL. The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product’s enclosure that may be of suffic
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Important Safety Instructions Please read all instructions and precautions carefully and completely before operating your Mark ® Levinson preamplifier. 1. ALWAYS disconnect your entire system from the AC mains before connecting or dis- connecting any cables, or when cleaning any component. 2. This product must be terminated with a three-conductor AC mains power cord which includes an earth ground connection. To prevent shock hazard, all three connections must ALWAYS be used. 3. AC extension cord
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From all of us at Madrigal Audio Laboratories, thank you for choosing the Mark Levinson Nº32 Reference Phono Preamplifier Modules. 4 A great deal of effort went into the design and construction of these precision devices. Used properly, they will give you many years of enjoyment.
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Table of Contents Special Design Features of the Nº32 Reference Preamplifier.......6 modular approach .............................................................................. 6 input connections .............................................................................. 6 input loading network ........................................................................ 6 ac regenerated power supply ............................................................. 7 fully balanced design........
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Special Design Features of the Nº32 Reference Preamplifier modular approach The Nº32 Reference Preamplifier and Reference Phono Preamplifier Modules were designed together. All the high performance power sup- ply, extensive control and high isolation input circuitry that character- izes the Nº32 Reference Preamplifier allows the purpose-built phono modules to perform at a extraordinarily high level. Each channel of the Nº32 reference phono preamplifier is a removable module. Each module is shiel
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tion, optional custom termination is provided via a pair of gold-plated terminal posts within each phono module. No soldering is necessary when using these binding posts. ac regenerated The foundation upon which any audio component is built is the power power supply supply. Without an extremely clean, noise-free power supply, no audio circuit can live up to its potential. Unfortunately, we live in a world in which the quality of AC mains power is increasingly in question. The modern conveniences
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able from our balanced circuitry by including a balanced XLR input connector version of the phono preamplifier modules. No32 XLR phono module recommended wiring NC 12 LEFT + 3 LEFT - TONE ARM GROUND NC 12 RIGHT + 3 RIGHT - Combined with a shielded, twisted pair cable from cartridge to preamp, the XLR input phono preamp offers the ultimate in noise rejection and low level signal resolultion. (An RCA-equipped version is also available for wider compatibility with existing phono cables.) 8 Madrigal
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width and open loop gain to provide uncompromised performance even at the 60db of gain required by a moving coil preamplifier. The instrumentation amplifier stage offers high common mode rejection, a noise-cancellation feature usually limited to transformer-based designs, while avoiding the serious limitations of those same designs. high accuracy A balanced pair of active RIAA equalization circuits follows the gain RIAA equalization stages. The filter is built with 0.1%, plate style (non-induct
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Unpacking Warning! Do not attempt to use your Nº32 Reference Phono modules unless your Nº32 Controller is using version 1.03 (or greater) of its operating software. Prior to installation, check your software by pressing Setup and turning the Select knob one click to the left, and reading the resulting display. If you need new software, please contact your authorized Mark Levinson dealer. unpacking Unpack your Nº32 Reference Phono Preamplifier modules and keep all packing materials for future tra
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Operating Voltage The Nº32 Reference Preamplifier is set at the factory (internally) for 100V, 120V, 230V, 220V, or 240V AC mains operation @ 50 or 60Hz. (230V/50Hz only in European Union countries, in compliance with CE regulations.) This voltage setting cannot be changed by the user. Make sure that the label near the AC receptacle of the Nº32 Controller indicates the correct AC operating voltage for your location. If the voltage indicated on your Nº32 Controller is incorrect, or if you wish to
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Installing the Nº32 Reference Phono Preamplifier Modules Important! Installation of the Nº32 Reference Phono Preampllifier Modules should be done by a qualified and authorized Mark Levinson dealer. The following description is provided for your reference (and that of the dealer). Failure to observe proper ESD (electrostatic discharge) procedures may result in damage the preamplifier. The optional Nº32 phono preamplifier modules may be installed inside of the Nº32 preamplifier for seamless integr
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material needed The following materials and tools are needed to perform the installa- tion of the Nº32 Phono modules into the Nº32 Preamplifier: 1 – Nº32 reference preamplifier 1 – pair Nº32 phono preamp modules 1 – wrist strap for ESD protection 3 1 – ⁄32" hex driver 5 1 – ⁄64" hex driver 5 1 – ⁄32" hex key 2 – 10-32 socket head cap screws installation procedure Carefully perform the following procedure after having read it through at least once from start to finish; taking it one step at a tim
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3. Remove the two screws from rear bottom of Nº32 Preampli- 3 fier top cover that hold it in place (using the ⁄32” hex key supplied with the Nº32). These are located at the bottom outside corners of the rear panel. 14 4. Slide top cover back slightly then up and off. Once you have slid the cover back approximately one-half inch (or about a centimeter), the cover can be lifted straight up and off. Note that you must clear the “key” in the front center of the top cover that fits into the front pan
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5. Peel off the protective film covering the copper strip on the end of the wrist strap, and attach it so that the copper strip contacts the chassis of the Nº32; wrap the other end around your wrist. Grounding yourself to the chassis on which you are working, us- ing a conductive ESD wrist strap, ensures that no voltage can build up between you and and part of the chassis. This is impor- tant since the chassis includes some components that are sensitive to electrostatic discharges (ESD). (Had yo
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this , not Warning: The cables must lie flat against phono preamp top cover to slide in to Nº32 preamp. 8. Gently slide the left phono preamp module into the open- ing in the left channel of the Nº32 preamp. Repeat for right channel. 16 Do not force! The phono preamp modules should slide in easily. If a phono preamp module does not slide in easily, remove it and repeat step 7. 9. Reinstall the four screws that were removed from phono 7 option cover plate ( ⁄64” hex key) Please take care to
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11. Carefully lift connector ends of cables out of holes in phono preamp top cover. Being careful to avoid catching the connectors on the edges of the slots in which they have been sitting during installation, set the unattached ends of the ribbons cable free as shown below. 17 12. Plug all four cables from phono preamp modules into their respective sockets on upper circuit board inside Nº32 Preamplifier. Note that the connector will “click” when fully seated. (all four connections)
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(closeup) 13. Remove your ESD wrist strap from the chassi and from your wrist. It would hinder your replacing the top cover, next. 3 14. Replace Nº32 preamp top cover and screws ( ⁄32” hex key) When replacing the top cover, note the guide pins at the bottom edges as well as the top “key” you noticed before. All three must be lined up before you slide the top cover forward, flush with the 18 front panel. 15. Reconnect the DC interface cables and restore power to the Controller (if you pow
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Customizing Your Nº32 setup overview The Nº32 Preamplifier has many provisions for custom-tailoring the system’s operation to match your preferences. The method for modify- ing any of these settings is to: • press the setup button on either the front panel or the re- mote control to enter the setup mode, accessing the Nº32’s menu system; • navigate among different menu items using the select knob or the remote control’s select buttons; • change the value of the selected menu item using either th
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Set Phono 1 Name= PH/MC 1 Ph Gain= +60 Gain= +12 dB Offset= 0.0 Bal= <-0.0-> 20Hz HPF=ON R Load=100 C Load=.01uF Set Phono 2 Name= PH/MM 2 Ph Gain= +40 Gain= +12 dB Offset= 0.0 Bal= <-0.0-> 20Hz HPF=ON R Load=47k C Load=100pF Teach IR Mute = -20.0 MaxVol= 80.0 Trig.= 12v,L Sw 1.07 1.02 (the software version numbers) 20 The Nº32’s extensive menu system allows you to customize the way the preamplifier operates, to better suit the needs of your system and your personal preferences. We will revi
