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Summary of Contents for Mark Levinson 33
- Page 1 Operating Manual Mark Levinson ® Nº 33 Reference Monaural Power Amplifier Madrigal Audio Laboratories, Inc.
- Page 2 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.
- Page 3 8. NEVER block air flow through ventilation slots or heatsinks. 9. NEVER bypass any fuse. 10. NEVER replace any fuse with a value or type other than those specified. 11. NEVER attempt to repair this product. If a problem occurs, contact your Mark Levinson ® tailer.
- Page 4 From all of us at Madrigal Audio Laboratories, thank you for choosing the Mark Levinson Nº 33 Reference 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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Page 5: Table Of Contents
Placement Considerations ................ 9 Ventilation ......................9 Spiking the Amplifier ..................10 Operating Voltage ..................11 Nº33 AC mains current requirements ............. 12 Nº33 rear-panel label ................12 Special Design Features ................13 Massive Power Supply ..................13 AC Regeneration ..................... 13 Fully balanced design .................. -
Page 6: Unpacking The Nº33
Shipping Crate with extreme care to avoid injury . At least two strong people are required (more is nice) to unpack the Nº33 amplifiers safely once they have been delivered to the appropriate location in their shipping crates. Included with your new Mark Levinson amplifier is two pairs of knit, white gloves designed to assist you in the initial unpacking and placement of your new purchase. - Page 7 The sides and ends may be lifted up and out of their respective slots in the base of the crate, and set to aside. As with the top, this may require some effort. Y ou should now have the Nº33 standing on the wooden base of the crate, inside its plastic shipping bag.
- Page 8 Nº33’s approximately 350 pounds (160 kg) being supported by four round casters. Before you remove the Nº33 from its shipping crate’s base, you may want to take measures to protect delicate flooring from possible damage.
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Page 9: Placement Considerations
Note that adequate clearance for the AC cord and connecting signal cables must be left behind each Nº33. We suggest leaving at least six inches (15 cm) of free space behind each Nº33 so that all cables have sufficient room to bend without crimping or undue strain. -
Page 10: Spiking The Amplifier
(who is supporting it). While the Nº33 is balanced on two feet, push a spike over each exposed caster, snugly covering the entire caster assembly . Gently lower the amplifier and repeat the... -
Page 11: Operating Voltage
Nº33 to the AC mains power in your area. The Mark Levinson Nº33 amplifiers may be factory-set for 100V, 120V , 200V, 210V , 220V , 230V or 240V AC mains operation at either 50 or 60Hz. Depending on local electrical codes and regulations, the plug on the supplied AC input module may need to be replaced by a local, licensed electrical contractor. -
Page 12: Nº33 Ac Mains Current Requirements
AC line for each amplifier of at least 200-volt and 30-ampere capability. The operating voltage of the Nº33 cannot be changed by the user, and any at- tempt to do so will void the warranty . If you need to change the operating volt- age of your Nº33 power amplifiers, or if the voltage indicated on the rear panel... -
Page 13: Special Design Features
AC power is delivered from the wall to the primary supply of the Nº33, where it is rectified, filtered and regulated into positive and negative DC voltages. A portion... -
Page 14: Fully Balanced Design
No known loudspeaker can absorb the continuous full power capability of the Nº33. (Nor would you want to be present in the room were you to find one that could do so.) However, many high quality loudspeakers may require these rather extreme power levels on a short term basis when reproducing music at realistic levels. - Page 15 Finally, the Nº33 incorporates a controlled clipping circuit that prevents the output devices from saturating. The harsh high frequency harmonics generated by hard- clipped output devices are avoided by the waveshaping action of this controlled clip circuitry.
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Page 16: Front Panel
A M P L I F I E R N º 3 3 Front Panel STANDBY BUTTON When power is first applied to the Nº33 power amplifier, and assuming the is set to its position, the amplifier remains rear panel AC mains switch completely . -
Page 17: Rear Panel
If your preamplifier does not support balanced connection to the power amplifier, connect the single-ended output of your preamplifier to the non- inverting RCA input on the Nº33. Repeat this process for the other Nº33(s) in your system, being certain to be consistent throughout. To reduce the... - Page 18 Although the best form of balanced interconnection is via a balanced cable and XLR connectors, it is possible to operate the Nº33 in a balanced con- figuration by using both inverting and non-inverting RCA inputs simulataneously .
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Page 19: Remote Turn-On Tip Polarity
. In addition, should a fault condition cause the amplifier’s pro- cable tection circuitry to activate, the Nº33 can report the nature of the problem to a linked Mark Levinson preamplifier via this communications link. If this any input... - Page 20 Spade lug Hook lug Connect a + (positive or red) output post of the Mark Levinson Nº33 to the + (positive or red) input terminal of the appropriate loudspeaker. [If biwiring, repeat using the other + (positive or red) output post of the am- plifier and the + (positive or red) input terminal of the loudspeaker.]...
- Page 21 Front Panel, item #2, or before the amplifier will respond to a remote turn-on command. Two slo-blow 35 ampere fuses are located inside the Nº33, on the AC mains module. The protection circuitry of the Nº33 has been designed such that only a catastrophic failure could cause these fuses to blow.
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Page 22: Care & Maintenance
Care & Maintenance To remove dust from the cabinet of the Nº33, use a feather duster. To remove dirt and fingerprints, we recommend isopropyl alcohol and a soft cloth. Apply the al- cohol to the cloth first and then lightly clean the surface of the Nº33. -
Page 23: U.s. And Canadian Warranty
Madrigal Audio Laboratories, Inc., P . O. Box 781, Middletown, CT 06457. The extended warranty for this Mark Levinson product is five (5) years from the Five Year Extended Warranty date of purchase. -
Page 24: Obtaining Service
We take great pride in our dealers. Experience, dedication, and integrity make these professionals ideally suited to assist with our customers’ service needs. If your Mark Levinson component must be serviced, please contact your dealer. Y our dealer will then decide whether the problem can be remedied locally, or whether to contact Madrigal for further service information or parts, or to obtain a Return Authorization. -
Page 25: Specifications
All technical measurements must be sub- ject to qualitative as well as quantitative interpretation. Measurements of the Mark Levinson Nº33 yield excellent results by any standards. However, only those speci- fications that apply to its actual operation are included here. All specifications are subject to change at any time, in order to improve the product. -
Page 26: Dimensions: Nº33
Dimensions: Nº33 2.875" 2.875" 7.3 cm 7.3 cm 12.75" 7.0" 32.3 cm 17.8 cm PUSH 5.0" MADRIGAL AUDIO LABORATORIES R E F E R E N C E 12.7 cm M O N A U R A L A M P L I F I E R N º... - Page 28 Madrigal Audio Laboratories, Inc. 2081 South Main Street, P.O. Box 781 Middletown, Connecticut 06457 USA Telephone: (860) 346-0896 Fax: (860) 346-1540 http://www.madrigal.com/ MADRIGAL AUDIO LABORATORIES is a registered trademark of Madrigal Audio Laboratories, Inc. a Harman International company 630133-5 © 6/1998 Madrigal Audio Laboratories, Inc. All rights reserved. Printed in U.S.A.
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