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Summary of Contents for Madrigal Audio Mark Levinson ?20.6
- Page 1 Operating Manual Mark Levinson ® Nº20.6 Monaural Reference Amplifier Madrigal Audio Laboratories, Inc.
- Page 2 Important safety instructions Read all instructions and precautions carefully and completely before operating your Nº20.6 Monaural Reference 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-conductor AC mains power cord which includes an earth ground connection.
- Page 3 Thank you for choosing the Mark Levinson ® Nº20.6 Monaural Reference 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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Page 4: Table Of Contents
Table of contents Unpacking and placement ............... 1 Unpacking ....................1 Placement ..................... 1 Ventilation ....................1 Custom installations ................1 Voltage selection ..................2 Figure 1: Rear panel ............... 2 Signal connection ..................3 Connectors .................... 3 Cables ....................3 Connection methods and operating modes ........ -
Page 5: Unpacking And Placement
Unpacking and placement Unpacking Unpack your Nº20.6 Monaural Reference Amplifier and keep all packing materials for future transport. Because of the weight of the unit, handles are provided front and rear so two people may lift and carry the amplifier comfortably and without risk of injury. Carefully inspect the product for damage and flaws. -
Page 6: Voltage Selection
Voltage selection The Nº20.6 can be internally set for 100V, 120V, 200V, 220V, or 240VAC mains operation. Make sure that the label on the rear panel indicates the correct AC operating voltage for your location. Figure 1: Rear panel – OUTPUT ®... -
Page 7: Signal Connection
Cables When connecting the Nº20.6 to a preamplifier, we recommend Madrigal Audio Laboratories HPC Interconnect Cable. HPC is available in various lengths, terminated with RCA, XLR, and Camac connectors. For more information, see your Mark Levinson dealer. Connection methods and The Nº20.6 can be operated in either single-ended or balanced... -
Page 8: Operation
Single-ended inverting If one component in the system inverts the signal and absolute phase operation at the loudspeaker is desired, inverting operation should be used. In this mode, the output signal of the amplifier will be 180° out of phase with the input signal. - Page 9 When complete, connect your preamplifier's main output to the XLR- type input connector on the rear panel of the Nº20.6. Note: For proper balanced operation, no connector (pre- shorted or otherwise) should be inserted into the RCA-type inputs on the rear panel of the Nº20.6. Nº20.6 Loudspeaker Figure 5: Connections for...
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Page 10: Speaker Connections
Speaker connections PRECAUTION NEVER connect the Nº20.6 output terminals to any device other than a loudspeaker. PRECAUTION NEVER short-circuit the amplifier output terminals. The Nº20.6 is equipped with special gold-plated, self-locking speaker connectors to optimize power transfer to the speaker cables. These connectors are rated at 50A continuous/80A peak current capability and represent an audible improvement over conventional connectors. -
Page 11: Connecting The Speakers
Connecting the speakers When the speaker cables are complete, connect the + (positive or red) output post of the Nº20.6 to the + (positive or red) input terminal of the appropriate loudspeaker. Connect the – (negative or black) output post of the Nº20.6 to the – (negative or black) input terminal of the appropriate loudspeaker. -
Page 12: Power Connection
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.) Connecting the Connect the AC power cord (included in the accessory pack) to the AC connector on the rear panel of the Nº20.6, then to the AC mains AC power cord outlet. -
Page 13: Bridged Operation
Bridged operation When greater power output is desired, two Nº20.6 amplifiers may be bridged to drive load impedances of at least 2Ω. Note: Make sure the loudspeaker is rated to handle extremely high power levels. For example, the output power of a pair of bridged Nº20.6 amplifiers is four times that of a single unit driving the same load (see the chart below). -
Page 14: Connections For Single-Ended Bridged Operation
1. For balanced bridged operation, you'll need a special three- ended cable. You may fabricate such a cable according to Figure 9; it's also available through your Mark Levinson dealer as part of a balanced bridging kit. Figure 9: Balanced XLR female bridging cable line-mount... - Page 15 Nº20.6 (Non-inverted amplifier) Figure 10: Connections for single-ended bridged operation – + PUSH – Shorting plug From preamplifier's main output T-connector Nº20.6 (Inverted amplifier) – + PUSH – – Loudspeaker Shorting plug 3. Connect the positive (+) output of the normal (non-inverted) amplifier to the + (positive or red) input terminal of the loudspeaker.
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Page 16: Care And Maintenance
Care and Maintenance Cleaning To remove dust from the cabinet of the Nº20.6, use a feather duster. To remove dirt and fingerprints, we recommend isopropyl alcohol and a soft, lint-free cloth. Poor connections cause sonic degradation. We recommend, therefore, that you clean all speaker connections with denatured alcohol at least once a year. -
Page 17: Specifications
2 Fischer output connectors 1 binding post 1 IEC mains connector For more information, see your Mark Levinson dealer or contact: Madrigal Audio Laboratories, Inc. 2081 South Main Street (Route 17) P. O. Box 781 Middletown, Connecticut 06457 U.S.A. Telephone: (203) 346-0896... -
Page 18: Dimensions
Dimensions Figure 11A: Dimensions, Nº20.6, top view 1-3/4" (44.5) 7/8" 2" (50.8) 17" 5/8" (22.2) (431.8) (15.9) 11" 17-1/2" 2-7/8" (279.4) (73) (444.5) 5-7/16" (138) 1-3/16" 9-3/4" (30.1) (247.7) 1" TYP. (25.4) 1-3/32" (27.8) 5/8" (15.9) 3/8" (9.5) 18-7/16" (468.3) Figure 11B: Dimensions, Nº20.6, side view 7-27/32"... - Page 20 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. ©1993 Madrigal Audio Laboratories, Inc. All rights reserved. 630013-1 Printed in U.S.A.
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