Mark Levinson N28 manuale d’uso

15 Madrigal Audio Laboratories, Inc. Operating Manual Mark Levinson ® N º 28 Pr ea mp lifie r[...]

16 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. WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. The lightning flash with arrowhead symbol, within an eq[...]

17 Important safety instructions Please read all instructions and precautions carefully and completely before operating your N º 28 Preamplifier. 1. ALWAYS disconnect your entire system from the AC mains before connecting or disconnecting any cables, or when cleaning any component. 2. This product is equipped with a three-conductor AC mains power [...]

18 From all of us at Madrigal Audio Laboratories, thank you for choosing the Mark Levinson ® N º 28 Preamplifier. A great deal of effort went into the design and construction of this precision device. Used properly, it will give you many years of enjoyment.[...]

19 T able of c on t e n ts Front panel ................................................................................................... 1 Rear panel ................................................................................................... 2 Unpacking and placement ....................................................................... [...]

1 MADRIGAL AUDIO LABORATORIES Nº 28 PREAMPLIFIER INPUT SELECTOR MONITOR SELECTOR RECORD SELECTOR OUTPUT LEVEL OFF 1 2 3 4 5 6 7 8 9 10 INPUT MONITOR DEFEAT TAPE 2 TAPE 1 TAPE 1 TAPE 2 AUX 3 PHONO/ AUX 1 AUX 2 CD TUNER 1 2 3 4 F r on t pan el 1 INPUT SELECTOR Selects one of the seven inputs: CD , TUNER , PHONO/AUX 1 , AUX 2 , AUX 3 , TAPE 1 , or TA[...]

2 PUSH PUSH PUSH PUSH BALANCED MAIN RIGHT LEFT AUX 2 RIGHT LEFT CD RIGHT LEFT GND POWER SUPPL Y INPUT LEFT RIGHT MAIN T APE 1 T APE 2 T APE 1 T APE 2 AUX 3 TUNER PHONO/ AUX 1 INPUTS OUTPUTS 1 2 3 4 5 6 8 7 Rear panel Disconnect all associated equipment from the AC mains BEFORE making any signal connections and applying power to the N º 28. Note: A[...]

3 Refer to the operating manual of your balanced-output line-level source to verify that the pin assignments of its output connector correspond to the N º 28. If not, wire the cable so that the appropriate output pin connects to the equivalent input pin. Note: If you won't be using the N º 28's balanced inputs and need more single-ended[...]

4 Unpacking and placement Unpack your N º 28 Preamplifier and keep all packing materials for future transport. Locate and remove all accessory items from the cartons. Carefully inspect the product for damage and flaws. If you find any, see your Mark Levinson dealer immediately. Place the N º 28 as close as possible to the source equipment, thus k[...]

5 V olt age se lec ti on The PLS-228 is factory-set (internally) for 100V, 120V, 200V, 220V, or 240V AC mains operation @ 50 or 60Hz. Make sure that the label on the bottom of the PLS-228 indicates the correct AC operating voltage for your location. PLS-228 POWER SUPPL Y W ARNING: BEFO RE A TTEMPTIN G TO OPERA TE THIS DEVICE , REFER TO O WNER'[...]

6 Set-up and installation The N º 28 incorporates RCA-type and XLR-type connectors for audio signal input and output. The Madrigal-designed RCA-type connectors used for single-ended audio interconnection are a great improvement over ordinary RCA- type connectors. The gold-plated XLR-type connectors employed are of European design, and are made to [...]

7 The high-gain and low-gain phono options offer internally selectable cartridge loading via four single-pole miniature rocker switches, one for each channel. The high-gain and low-gain options have been factory-adjusted at 825 Ω and 47K Ω , respectively. If you wish to change the factory-adjusted cartridge loading, see "Making the interna[...]

8 If you wish to vary the input capacitance of the phono option to obtain the optimal value for a particular cartridge, a capacitor may also be inserted into the optional load terminals (see "Terminating the optional load" and "Making the internal adjustments"). Because the inherent input capacitance (all switches off) is in par[...]

9 Be sure all associated equipment is disconnected from the AC mains. After making all signal connections and internal adjustments, connect the ten-pin DC cable from the rear panel of the PLS-228 to the connector on the rear panel of the N º 28. Connect the AC cord to the male IEC connector on the rear panel of the PLS-228, then connect the AC cor[...]

10 Car e an d m ai n t e n an c e To remove dust from the cabinet of the N º 28, use a feather duster. To remove dirt and fingerprints, we recommend isopropyl alcohol and a soft cloth.[...]

11 Specifications The correlation between published specifications and sonic quality is unreliable. A list of numbers reveals virtually nothing. All technical measurements must be subject to qualitative as well as quantitative interpretation. Measurements of the N º 28 yield excellent results by any standards. However, only those specifications th[...]

12 Dimensions 10-7/8" (276.3) 17-1/2" (444.5) 7-1/2" (190.5) 1-1/2" (38.1) 3/4" dia. (19.1) 3/8" (9.5) 1/8" (3.2) 15-17/64" (387.8) 17-17/64" (438.6) 1" (25.4) 7/16" (1 1.1) 7/64" (2.5) 2-3/4" (69.9) 2-9/16" (65.1) Dimensions, N º 28, top view Dimensions, N º 28, side view[...]

13 13-1/8" (333.4) 8-35/64" (217.1) 9-1/16" (230.2) 1-55/64" (47.2) 3/4" dia. (19.1) 3/8" (9.5) 3/16" (4.8) 8-3/16" (208.0) 1-15/64" (31.4) 7/16" (1 1.1) 5/64" (2.0) 2-3/4" (69.9) 2-39/64" (66.3) 5-3/4" (146.1) Dimensions, PLS-228, top view Dimensions, PLS-228, side view[...]

14 ©1993 Madrigal Audio Laboratories, Inc. All rights reserved. ® MADRIGAL AUDIO LABORATORIES 2081 South Main Street, P.O. Box 781 Middletown, Connecticut 06457 USA Telephone: (203) 346-0896 Fax: (203) 346-1540 is a registered trademark of Madrigal Audio Laboratories, Inc. 630080-2 Printed in U.S.A.[...]