Yamaha P-2200 User Manual download pdf (Page 7)

INTRODUCTION

The P-2200 is not just "another big amplifier;" it is

an exciting new approach to high power sound. Yamaha's

leadership is clearly demonstrated by the P-2200's pro-

fessional features, sophisticated design, and uncom-

promising performance.

PEAK READING METERS*

Instead of the more common and slow responding

VU meters, the P-2200 has PEAK READING METERS

that

accurately display

full

five

decades

(50dB)

output level. The peak meters have large, illuminated

faces marked with dB and with watts into 8 ohms. The

fast responding meters provide a better way to see the

program dynamics, the transient power demands placed

on the system, and the available headroom. By indicating

headroom, the meters help the operator avoid over-

driving the system, thereby preventing the "clipped"

waveforms so dangerous to drivers and loudspeakers.

CALIBRATED INPUT ATTENUATORS

The P-2200 has log-linear INPUT ATTENUATORS to

complement its peak reading meters. The input attenua-

tors are marked in 22dB-calibrated steps, detented for

extra accuracy. The attenuators provide a smooth, noise

free transition from the highest to the lowest audio level.

dB-calibrated

input

attenuators

have

numerous

advantages: on the road, they allow predictable and

repeatable setups; in commercial sound applications,

they allow easy, accurate input sensitivity adjustments;

in studios or discos, they let operators simultaneously

adjust the level of two channels (or two programs on

separate amplifiers) with precise tracking.

INPUT AND OUTPUT CONNECTIONS

INPUT CONNECTORS for each channel include one

"male" and one "female" XLR connector (unbalanced)

plus two parallel phone jacks. This provides the flexi-

bility

necessary

for

convenient bridging

another

amplifier, as well as for adapter-free connection to

almost any mixer. A POLARITY switch allows either

pin 2 or pin 3 of the XLR to be chosen as the "hot"

lead, satisfying DIN/JIS or USA standards. Outputs are

standard five way binding posts, usable with high current

"banana" plugs or direct wired connections.

MONAURAL OPERATION

The P-2200 may be converted to a monaural "super

amplifier" by inserting two matched transformers

ahead of the inputs, feeding the same signal to both,

and reversing the POLARITY switch on one input. This

creates a transformerless balanced output, the speaker

load "bridged" across the "hot" terminals of both

channels. In this mode, the P-2200 is suitable for

driving almost any load, including highly reactive 70-volt

commercial speaker lines. With a full 400 watts into

16 ohms, the P-2200 in mono mode eliminates the need

for several smaller 70-volt amplifiers.

PERFORMANCE

The P-2200's performance is as impressive as its

features. At a sustained output of 230 watts into 8 ohms

(for each channel), there is plenty of punch to reproduce

the powerful peaks essential to clean studio monitoring.

High power handling also makes the P-2200 an unbeat-

able choice for live rock or disco sound systems, where

an amplifier can really "cook" all night long. Power alone

virtue;

the P-2200

has

ultra-low

distortion,

less

than

0.05% THD at full rated power - the kind of low

distortion that is undetectable by even the most critical

listeners.

A high damping factor of better than 300 at

frequencies below 1kHz reduces the tendency for

speaker cone overshoot, giving tighter and better defined

bass response. On the other end, the P-2200's frequency

response extends well beyond 100kHz, enabling it to

accurately reproduce the most complex musical wave-

forms — even the tortuous output of today's synthe-

sizers. However, high frequency response has not been

achieved at the expense of stability; in fact, the P-2200

is rock steady. Even when connected to highly reactive

multi-speaker loads, there is no tendency to shut down

or "take off" into spurious oscillation.

MECHANICAL CONSIDERATIONS

The P-2200 is constructed to withstand the high "G"

forces encountered on the road. Its solid front panel

mounts in any standard 19-inch rack, and, for a large

amplifier, the P-2200 weighs a modest 44 pounds

(20kg)** Front panel controls and meters are recessed to

avoid damage or accidental setting changes, and are

further protected by a pair of sturdy carrying handles.

Inside

and

out,

the P-2200

extremely reliable.

Still,

should

service

ever

required, the

unit

designed

for

easy access. Massive side-mounted heat sinks are

designed for efficient cooling, making fans unnecessary

in all but the most severe thermal operating conditions.

Four non-conductive feet ensure proper air flow when

the amplifier is shelf mounted, and avoid inadvertent

ground loops. Multiple protection circuits make the

amplifier nearly abuse proof and eliminate the need for

troublesome DC power supply fuses.

* The P2201 does not have the Peak Reading Meters.

* * The P2201 weighs 42 pounds (19kg)

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Yamaha P-2200 User Manual Page 7

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