Yamaha PC4002M 운영 매뉴얼 - 페이지 4

{카테고리_이름} Yamaha PC4002M에 대한 운영 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Yamaha PC4002M 43 페이지. Professional series power amplifier
Yamaha PC4002M에 대해서도 마찬가지입니다: 운영 매뉴얼 (43 페이지), 운영 매뉴얼 (43 페이지), 운영 매뉴얼 (43 페이지)

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INTRODUCTION

The PC4002/4002M

are top-quality, high-power ampii-

fiers, and with their impressive output combined with low

distortion figures, are ideally suited to studio monitoring

use, but at the same time.are rugged enough to act ad-

mirably as a professional amplifier where top quality is

required. Their features include:

Large, illuminated peak meters (PC4002M only) for

instant confirmation of output levels. In addition to the

meters, which provide a faster response than VU meters,

LED clip level indicators are provided for instant signalling

of clipping.

Front panel status indicators show the following:

if bridged (BTL) operation has been selected, high-speed

fan operation, and overload/power-up muting, as well as

a power indicator. The power switch is recessed into the

front panel, to prevent accidental resetting.

Decibel-calibrated

input

attenuators,

detented

for

extra accuracy. This makes for predictable and repeatable

setting-up on the road, and accurate input sensitivity ad-

justments. In multi-amplifier setups, precise tracking be-

tween amplifiers can be easily achieved. Input attenuator

knob locks prevent accidental resetting of levels.

Power-up

muting for about six seconds after the power

has been

turned

gives protection

to speakers

after

power-on,

avoiding the "thump" which can easily blow

out cones.

Each

channel

is provided

with

input

connectors

which are male and female balanced XLR, as well as bal-

anced 1/4-inch phone (using a TRS-type connector). This

allows convenient

bridging to another amplifier, as well

as adapter-free connection to almost any mixer.

Speaker terminals are screw-post type, with the ability

to accept heavy-gauge speaker cable for maximum fidelity.

automatic

two-speed

quiet

twin-fan

cooling

system prevents thermal overload, and cuts in at the low

speed when heat-sink temperatures exceed 60'C, and at

high speed above 80'C. The washable

fan filters are re-

movable from the front panel, eliminating the need to re-

move the amplifier from a rack when the filters need to

be cleaned.

Robust

mechanical

design

for

practical

use.

The

PC4002/4002M

is, of course, 19" rack-mountable, with

front handles which

also help protect the controls and

meters. Though designed to be extremely reliable, and to

withstand the rigours of life on the road, if access is ever,

needed to the interior of the unit, this has been made easy,

with bulb replacement, meter adjustment, etc, being pos-

sible from the front panel. Power-cable hooks also act as

a support if the amplifier is used in a vertical position, and

four feet ensure airflow if the amplifier is shelf-mounted.

Multiple protection

circuits safeguard

the amplifier and

speaker system against abuse and faulty connections.

Twin power supplies and transformers for the power

amplifier stage add reliability and add quality to the sound

of the PC4002/4002M.

Bridged mode (BTL) from the A channel input is easily

obtained by the use of one switch on the back panel, and

connecting

the

(+) terminals

of the CH-A

and CH-B

` speaker outputs to one speaker.

Figures that match the features. With a THD of less

than 0.00596 at 215W into 8Q, and a figure which is still

less

than

0.01%

700W

(mono)

into

80,

the

PC4002/4002M

is one of the cleanest high-power am-

plifiers on the market - making it especially useful for studio

monitoring operation.

Channel separation, damping factor

and signal/noise figures are as good as or better than you

would normally expect from an amplifier of this calibre,

while the slew rate is an impressive 60V/uS (stereo) -fast

enough to handle the fastest transients.