Mark Levinson 431 Manual de usuario

Nº432 & Nº431

DUAL-MONO POWER AMPLIFIERS

Power amplifiers are core components of any

high performance entertainment system.

Their task is formidable – they must comfort-

ably drive a wide variety of demanding

speakers while preserving all the power and

nuance of the source material. The ability to

maintain sonic neutrality, while exercising

brute force or finesse as appropriate, is an

attribute that has made Mark Levinson

power amplifiers the standard in the industry

for nearly 30 years.

The Nº432 and Nº431 replace the Nº336,

Nº335 and Nº334 dual-mono power ampli-

fiers in the Mark Levinson line. The design of

the Nº432 and Nº 431 is derived from the

Nº436 and Nº434 mono power amplifiers.

This continuing evolution is driven by our

unrelenting desire to produce products that

deliver better performance and greater value

than their predecessors. The Nº432 and

Nº431 have power ratings of 400 and 200

watts per channel at 8Ω, and 800 and

400 watts per channel at 4Ω,

respectively. Like their

300 series predeces-

sors, these new

power ampli-

fiers are convection

cooled and utilize indi-

vidual exposed internal

heatsinks for each channel.

Nº432 &

º431

DUAL-MONO POWER AMPLIFIERS

Nº432

Nº432 Interior

The physical and sonic properties of the

Nº432 and Nº431 are built upon the Mark

Levinson power amplifier tradition. The

power supply is the foundation that all of the

audio circuitry is built upon. Each channel

benefits from a massive, dedicated, independ-

ent linear power supply. Our listening tests

continue to confirm that abundant clean

power is essential for high performance.

Precise control of this power reserve is the

task of the power amplifier’s voltage gain and

output stage circuitry. Mark Levinson power

amplifiers have always featured precision

circuitry designed to fully exploit balanced

signals. Rather than simply duplicate circuit-

ry for both halves of the balanced input signal

as many power amplifiers do, our power

amplifiers have featured an advanced topolo-

gy for greater efficiency, performance and

sonic benefits. The Nº432 and Nº431 contin-

ue this practice. Though similar to the

Voltage Gain circuit in the 300 series power

amplifierss that they replace, this new genera-

tion of power amplifiers features a more

elegant topology closely related to the Nº436

and Nº434 mono power amplifiers.

As with all Mark Levinson power amplifiers,

particular attention is paid to the layout of

circuitry and precise location and routing of

connections. All circuit board layout is

performed by our engineers rather than by a

computer program. These new power ampli-

fiers outperform their predecessors in part

because of the refinement of circuit layout.

Additionally, the ultra-high performance parts

that make up our balanced circuits are able to

work to their full potential because they

reside in the most neutral circuit board mate-

rial we know of: Arlon®. The matched output

transistors continue to be the best performing

parts available for this application and they

are mounted directly to the exposed internal

black anodized aluminum heat sinks.

The Nº432 and Nº431 carry on the Mark

Levinson tradition of combining brute force

with finesse while avoiding the common

mistake of imparting their own fingerprint on

the sound. They are welcome additions to

the impressive Nº436 and Nº434 mono

power amplifiers and worthy successors to

the 300 series. The Nº432 and Nº431 are

capable of providing remarkable performance

to provide years of listening enjoyment.

Nº431

3 Oak Park, Bedford, MA 01730-1413 USA

Tel: 781-280-0300 | Fax: 781-280-0490

www.marklevinson.com

Specifications are subject to change without notice.

Mark Levinson®is aregistered trademark of

Harman International Industries, Incorporated.

Not responsible for typographic errors.

Part # 072-16156

Nº432&Nº431Dual-MonoPowerAmplifiers

Rated power output: Nº432

400W/ch rms power @ 8Ω

800W/ch rms power @ 4Ω

Nº431

200W/ch rms power @ 8Ω

400W/ch rms power @ 4Ω

all above power ratings from 20Hz–20kHz at <0.5% THD

(assuming that the AC mains can deliver adequate current, without its own voltage sagging)

Frequency response: within 0.3dB from 20Hz to 20kHz

Signal-to-noise ratio: better than –65dB (ref. 2.83V)

Voltage gain: 26.8dB

Input impedance: 100kΩ(balanced)

50kΩ(unbalanced)

Input sensitivity 2.83V output: 130 mV

Full output: 2.58V for Nº432, 1.82V for Nº431

Power consumption: Nº432 650W in on, 130 watts in standby, 10W in sleep

Nº431 375W in on, 100 watts in standby, 10W in sleep

Mains voltage: Determined by the needs of the country for which the unit was manufactured;

cannot be reset by dealer or user

Connector complement: (4) custom binding posts

(2) 3-pin XLR balanced input connectors

(2) RCA input connectors

(2) 1/8” mini-jacks for remote turn-on

(1) RS-232 port on RJ-11

(2) Mark Levinson communications ports on RJ-11, RJ-45

(1) IEC-standard AC receptacle

Output impedance: less than 0.02Ωfrom 20-20,000 Hz

Damping Factor: greater than 400, 20-20,000 Hz @ 8Ω

Overall dimensions: Nº432

width: 17.75" (45.1cm)

height: 7.65" (19.4cm)

depth 19.83" (50.4cm)

Nº431

width: 17.75" (45.1cm)

height: 5.91" (15cm)

depth 19.83" (50.4cm)

Shipping weight: Nº432 125lb (57kg)

Nº431 105lb (48kg)

Net weight: Nº432 115lb (52kg)

Nº431 95lb (43kg)

Otros manuales para 431

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