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Madrigal Imaging Mark Levinson No. 29 - page 1
17 Operating Manual Mark Levinson ® N º 29 Dual Monaural Power Amplifier Madrigal Audio Laboratories, Inc. ...
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Madrigal Imaging Mark Levinson No. 29 - page 2
18 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 ...
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Madrigal Imaging Mark Levinson No. 29 - page 3
19 Important safety instructions Please read all instructions and precautions carefully and completely before operating your N º 29 Dual Monaural Power Amplifier. 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-conducto ...
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Madrigal Imaging Mark Levinson No. 29 - page 4
20 Thank you for choosing the Mark Levinson ® N º 29 Dual Monaural Power Amplifier. 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. ...
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Madrigal Imaging Mark Levinson No. 29 - page 5
21 T able of c on t en ts Unpacking and placement ....................................................................... 1 Unpacking ................................................................................................. 1 Placement ................................................................................................. 1 Ventil ...
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Madrigal Imaging Mark Levinson No. 29 - page 6
1 Unpacking and placement Unpack your Nº29 amplifier and keep all packing materials for future transport. To avoid damaging the connectors on input cables attached to the rear panel, NEVER rest the Nº29 on the rear panel, and NEVER tip it back in a way that would put stress on these connectors. Carefully inspect your Nº29 for damage and flaws. I ...
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Madrigal Imaging Mark Levinson No. 29 - page 7
2 V olt ag e se lec tion The Nº29 is factory-set (internally) for 100V, 120V, 200V, 220V, or 240V AC mains operation. Check that the label on the rear panel of the amplifier indicates the correct AC operating voltage for your location. Nº 29 DUAL MONAURAL AMPLIFIER + –– + SERIAL NO. WARNING: HAZARDOUS VOL T AGES A VAILABLE INSIDE: DISCONNECT ...
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Madrigal Imaging Mark Levinson No. 29 - page 8
3 Signal connections The N º 29 incorporates RCA-type and XLR-type connectors for audio signal input. 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 professional app ...
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Madrigal Imaging Mark Levinson No. 29 - page 9
4 Inverting operation should be used if a phase reversal is required. In this mode of operation, the output signal of the amplifier will be 180 ° out of phase with the input signal. This may be required if one component in the system inverts the signal and absolute phase at the loudspeaker is desired. For inverting operation, the main output cable ...
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Madrigal Imaging Mark Levinson No. 29 - page 10
5 If your preamplifier is equipped with a balanced main output, it's best to wire the N º 29 for balanced operation, particularly if long cable lengths are required between the preamplifier and the N º 29. (See Figure 3 for the pin assignments of the N º 29's XLR-type inputs.) Connect the XLR-type male line-mount connector to the pream ...
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Madrigal Imaging Mark Levinson No. 29 - page 11
6 Speaker connections NEVER connect the N º 29's output terminals to any device other than a loudspeaker. NEVER short-circuit the amplifier output terminals. NEVER connect the left-channel output terminals to the right-channel output terminals. The N º 29 is equipped with gold-plated, high-current, five-way binding posts for output terminati ...
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Madrigal Imaging Mark Levinson No. 29 - page 12
7 3. Strip 1/2" of insulation from the speaker cable. 4. Gently slide the (5/8") bare end of the 14-gauge wire into the center of the bare speaker cable (be careful not to spread the individual wires of the speaker cable). 1/2" (12.7mm) Speaker cable Solder Ti n Figure 7B: Pigtail connection 5. Solder this connection. A high-wattage ...
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Madrigal Imaging Mark Levinson No. 29 - page 13
8 Power connection After making your loudspeaker connections, apply power to your preamplifier and allow it to stabilize. (Mark Levinson preamplifiers, for example, require about one minute to stabilize.) Connect the AC power cord (included in the accessory pack) to the AC connector on the rear panel of the N º 29, then to the AC mains outlet. Con ...
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Madrigal Imaging Mark Levinson No. 29 - page 14
9 Bridged operation When greater power output is desired, the N º 29 may be bridged for monophonic operation into load impedances of at least 2 Ω . Note: Make sure the loudspeaker is rated to handle high power levels. For example, a bridged N º 29 driving an 8 Ω loudspeaker is capable of delivering 200W RMS. For the best bridged performance, ...
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Madrigal Imaging Mark Levinson No. 29 - page 15
10 Figure 10: Balanced bridging cable 21 3 21 3 Signal ground (shield) Left-channel XLR male line-mount (rear view) Twisted pair Right-channel XLR male line-mount (rear view) 12 3 XLR female line-mount (rear view) Twisted pair Signal ground (shield) 2. Connect the bridging cable's male XLR-type connectors to the N º 29's left- and right- ...
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Madrigal Imaging Mark Levinson No. 29 - page 16
11 2. Connect the bridging cable between the left- and right-channel XLR-type input connectors, taking care to insert the correct cable end into its designated channel. You may fabricate such a cable according to Figure 12; it's also available through your Mark Levinson dealer as part of a single-ended bridging kit. Note: If fabricating the br ...
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Madrigal Imaging Mark Levinson No. 29 - page 17
12 Car e an d m ain t e n an c e To remove dust from the cabinet of the N º 29, use a feather duster. To remove dirt and fingerprints, use isopropyl alcohol applied to a soft cloth. Poor connections cause sonic degradation. We recommend, therefore, that you clean all speaker connection with denatured alcohol at least once a year. Consult your Mark ...
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Madrigal Imaging Mark Levinson No. 29 - page 18
13 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 29 yield excellent results by any standards. However, only those specifications th ...
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Madrigal Imaging Mark Levinson No. 29 - page 19
14 Dimensions 17-1/2" (444.5) 1-3/4" (44.5) 1-3/32" (27.5) 3/8" (9.5) 4-1/8" (104.8) 14-3/16" (360.4) 29/32" (23.0) 1-9/16" (39.7) 4-29/64" (1 13.1) 1" TYP . (25.4) 1-7/16" TYP . (36.5) 1/8" (3.2) 17-1/4" (438.2) 2-53/64" (71.8) 5-7/8" (174.8) 5-1/4" (133.4) 13/16" ...
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Madrigal Imaging Mark Levinson No. 29 - page 20
16 630042-1 Printed in U.S.A. ©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. ...
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