Dual Monaural Power Amplifiers Operating Manual N 333 N 332 N 331

6 AC MAINS CORD AND AC MAINS SWITCH

Conventional IEC standard power cords cannot be used in the Nº 333, due

to the potential current requirements of Nº 333 when operating into low

impedance loads. (The highest available current rating for an IEC standard

three-conductor connector such as is used on most stereo equipment, in-

cluding other Mark Levinson products, is 16 amperes.) Instead, the Nº 333

incorporates a high current AC cord which is attached directly to the ampli-

fier itself.

Conventional IEC standard power cords are used in the Nº 332 and Nº331,

since their lower rated power reduces their worst-case current requirements

when operating into low impedance loads.

Warning! Your new Mark Levinson amplifier has been safety-tested and

is designed for operation with a three-conductor power cord.

Do not defeat the “third pin” or earth ground of the AC power

cord.

In CE-certified units intended for European use, an AC mains switch is lo-

cated adjacent to the power cord on the rear panel of the amplifier. This

switch may be used to disconnect the supervisory power supply from the

AC mains without having to actually unplug the amplifier from the wall out-

let. Since this small supervisory supply controls the main power supply’s

access to AC power, shutting down the supervisory power supply also dis-

connects the main supply from AC. If you plan to be away for an extended

period, or have any other reason to turn the amplifier completely off, you

may either unplug the amplifier or (in the case of CE units) you may use

the AC mains switch.

Note: When first connected to the AC mains, the amplifier normally

draws a small amount of power which is used to control the

power-up sequence. Turning the CE-required rear panel switch

“off” disconnects even this small power supply; you must turn

this switch back “on” before you can enter the power-up

sequence described in Front Panel, item #2, or before the

amplifier will respond to a remote turn-on command.

Amplifiers intended for non-European markets do not have

this switch, somewhat simplifying operation.