Mark Levinson No33H User Manual

Owner’s ManualNº33HMonaural Power Amplifier

6NoteBuilding regulations and electrical codes differ from locationto location, making it impossible to anticipate the require-ments of high-current A

7Special Design FeaturesWhile the Nº33H Monaural Power Amplifier is straightforward ineveryday use, it includes several design features that are respo

8Fully Balanced Design A truly balanced input topology eliminates the need for an inputbuffer amplification stage, allowing the first stage differenti

9cycle the amplifier with the ~ac mains relay switch on the rearpanel.In addition, the AC input to each transformer is fused to protectagainst excessi

10Front PanelREFERENCEMONAURALAMPLIFIERNº 33H211. standby buttonWhen power is first applied to the Nº33H power amplifier, andassuming the rear panel A

11Caution! Before making any connections, turn the master volume on theassociated preamplifier all the way down, then power off theNº33H and all assoc

122. ~ac mains relay switchThe AC mains switch turns the amplifier completely off bydisconnecting the supervisory power supply from the ACmains. Since

135. loudspeaker binding posts (outputs)Provide audio output. Two pair of custom-made, gold-plated,high-current binding posts labeled + (positive) and

146. slave in & slave out communication portsProvide “links” to compatible Mark Levinson preamplifiersand power amplifiers, allowing the Nº33H and

15LinkingLinking is available for all Mark Levinson components that offerLink or communication ports, including master, slave in,slave out, , input

1. Read these instructions.2. Keep these instructions.3. Heed all warnings.4. Follow all instructions.5. Do not use this apparatus near water.6. Clean

Creating a Slave Chain Making Link connections creates a slave chain that facilitatescommunication among linked components, allowing them toshare cert

17• Must include components that are connected in a certainorder to prevent communication from terminating. Poweramplifiers such as the Nº33H must be

18slave outNº320S PreamplifierStep A:Connect the (slave out) communication port on the preamplifierto the slave in communication porton the f

19Link Controls Linking Mark Levinson components allows them to share certaincontrols. The table below provides a general description ofcontrols the N

20TroubleshootingIncorrect operation is sometimes mistaken for malfunction. Ifproblems occur, refer to this troubleshooting section. If problemspersis

214. No audio and the front panel indicator LED is litat full brightness.• The Nº33H is powered on, but is not passing a signal.Power the Nº33H off wi

22Care & MaintenanceTo remove dust from the cabinet of your Nº33H, use a featherduster or a lint-free soft cloth. To remove dirt and fingerprints:

23SpecificationsThe correlation between published specifications and performanceis unreliable. Measurements of your amplifier yield excellentresults b

Dimensions24

25Declaration of ConformityApplication of Council Directive(s):89/336/EEC and 73/23/EEC, as amended.Standard(s) to which Conformity is Declared:• EN 5

FCC NoticeThis equipment has been tested and found to comply with the limits for a Class B digital device,pursuant to part 15 of the FCC Rules. These

26Notes

3 Oak Park, Bedford, MA, 01730-1413 USA | Telephone: 781-280-0300 | Fax: 781-280-0490 | www.marklevinson.comCustomer Support: Telephone: 781-28

iiiDocumentationConventionsThis document contains general safety, installation, and operationinstructions for the Nº33H Power Amplifier. It is importa

1Table of ContentsUnpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2Opening the Shipping Crate . . . . . . . . .

2UnpackingWarning! DO NOT attempt to lift or move the Nº33H without adequateassistance. Failure to follow the procedures included in thisowner’s manua

34. Use a socket wrench to remove:• The four 9/16-inch hexagonal-head bolts that secure theNº33H to the base of the crate. These bolts attach directly

4Installation ConsiderationsThe Nº33H requires special care during installation to ensureoptimal performance. Pay particular attention to the informat

5• DO NOT place the Nº33H on a thick rug or carpet or coverthe Nº33H with a cloth, as this might prevent proper cooling. • DO NOT expose the Nº33H to