Panasonic WP-1400 User Manual

Operating

Instructions

2-channel Power Amplifier

WP-1200/WP-1400

WP1200

WP-1400

Panasonic.

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CONTENTS

GENERAL ............................................................................................................................................................................................................ 2

FEATURES .......................................................................................................................................................................................................... 2

PRECAUTIONS ....................................................................................................................................................................................................2

MAJOR OPERATING CONTROLS AND THEIR FUNCTIONS ...........................................................................................................................3

CONNECTIONS .................................................................................................................................................................................................. 5

RACK MOUNTING ...............................................................................................................................................................................................6

BLOCK DIAGRAM ................................................................................................................................................................................................7

SPECIFICATIONS ................................................................................................................................................................................................8

APPEARANCE .................................................................................................................................................................................................... 9

WARNING:

TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.

- 1 -

GENERAL

Panasonic's new RAMSA power amplifiers WP-1200,
WP-1400 are high performance for the high density,
powerful, high-quality sound musicians demand. And to
maintain the optimum operating temperature, WP-1200 and
WP-1400 features the newly developed servo cooling
system which is constantly adjusted the fan speed
regardless of output level.

FEATURES

The WP-1200, WP-1400 are 2-channel power
amplifiers providing continuous outputs of 200W (RMS)
+ 200W (RMS) [WP-1200], 400W (RMS) + 400W [RMS]
[WP-1400] (THD 0,3*/. or less with 4-ohm load, 40 Hz to
20 KHz). At 0-Ohm load : 120W (RMS) + 120W (RMS)
[WP-1200], 240W (RMS) + 240W (RMS) [WP-1400]
continuous output (THD 0.3*/. or less with 8-ohm load,
20 Hz to 20 KHz) can be obtained.

In bridge mono mode the power amplifier provides
a 400W (RMS) [WP-1200], 800W (RMS) [WP-1400]
output (THD 0.3*/. or less for 8-ohm load, 20 Hz to 20
KHz).
The input circuit is electronically balanced employing
an operational amplifier of excellent transient response
and wide bandwidth. As a result, deterioration of
response caused by the transformer and the effects
of induction noise are minimized.
Two types of input connectors are provided XLR type
connectors (female) and 1/4” TRS phone jacks.

Speaker safety is further assured by CROW-BAR circuitry
which operates when DC voltage is generated at the output
terminals due to amplifier malfunction.

The amplifier is protected by a Vl-type energy limiter
(voltage/current sensing protection circuit) that limits
the current in the event of a short circuit and cuts off the
output in the event of malfunction such as overheating
or DC.
The muting circuit prevents switching noise caused by
turning the amplifier on or off.

Input level adjustment controls are provided on each
channel.

5 way binding posts are provided as output terminals.
These posts are evenly-spaced, enabling the use of
dual-banana plugs for either individual channel output,
or bridge mode.

A ventilation fan prevents the amplifier from
overheating when properly installed.

These amplifiers are power efficient due to the Class

H power output circuit.
Output terminal CROW-BAR DC detection circuit
protects the speakers.
Front-panel LED's indicate peak signal and protect

mode.
The automatic fan control circuit varies the fan speed

as needed by sensing the temperature of the heat sink
and the power transformer.

PRECAUTIONS

Do not stand the amplifier vertically on its back.
Due to the muting circuit, no sound is produced for 4 to
6 seconds after turning on the power supply.

Always use a power source of adequate capacity.
Do not turn on the power of multiple power amplifiers
at the same time. Never allow the ventilation holes on
the Front and Rear of the amplifier to get obstructed in
any way.

To clean the amplifier, wipe it with a dry cloth. If the
case is very dirty, disconnect the AC cord from the
power source, then wipe it with a cloth dampened in
water or mild soapy water, then wipe dry thoroughly.
Never use solvents or chemical cloth, similarly, never
spray insecticides as they may cause discoloration or
peeling.

If any trouble is found, disconnect the power cord and
contact your dealer.

-2 -

MAJOR OPERATING CONTROLS AND THEIR FUNCTIONS

WP-1200

• Front Panel:

WP-1400

• Front Panel

• Rear Panel

• Rear Panel:

1. Power ON/OFF switch [POWERJ

• The power amplifier reaches the operating
conditions 4 to 6 seconds after turning on the
power ON/OFF switch due to a muting circuit
which prevents switching noise at power-up.

CAUTION :

When using the WP-1200/1400 in a system
with other equipment such as a mixer, equalizer,
and other signal processor, always turn the
amplifier on last as switching noise from the other
equipment can damage the speakers. Similarly, at
system power-down always turn the amplifier off

first.

2. Peak level Indicator (PEAK (red) A]

When this LED lights, the output signal of the A channel
has reached its clipping level; possibly resulting in
distortion. Should this occur, either adjust the output
level of the mixer or adjust the power amplifier Input
Level control so that the PEAK LED turns off.

3. Peak level indicator|[PEAK, (red) B]

When this LED lights, the output signal of the B channel
has reached its clipping level; possibly resulting' in
distortion. Should this occur, either adjust the output
level of the mixer or adjust the power amplifier Input
Level control so that the PEAK LED turns off.

-3-

4. Protect Indicator [PROTECT (orange) B]
The LED indicates that the muting circuit for the B
channel is activated and therefore sound cannot be
produced at the output. This occurs for 4 to 6
seconds when the amplifier is turned on, and also
during overheating or any malfunction that may cause
damage to the speakers.

5. Power ON indicator [POWER] (red)
Indicates that the amplifier is turned on.

6. Protect Indicator [PROTECT (orange) A]
The LED indicates that the muting circuit for the A
channel is activated and therefore sound cannot be

produced at the output. This occurs for 4 to 6
seconds when the amplifier is turned on, and also
during overheating or any malfunction that may cause
damage to the speakers.

7. Mode selector [MODE]
[STEREO A .B , BRIDGE A ONLY]
Selects between STEREO mode (A in/A out, B in/B

out) or BRIDGE mode (A in/A & B combined out). When

using Bridge Mode the input signal must be applied to

the A Channel only.

8. Input level control [INPUT LEVEL B]

• When this control is at "10", the B channel will
reach its rated power output when the input signal
is at a level of + 4 dB.

• The calibrated markings on the front panel indicate
the amount of attenuation applied to the input
signal. The allows proper volume setting of the
speakers when the input signal source is at its
rated level,

12. Rear panel protection angle

These angles protect the input and output terminals
against damage. However, do not stand the power
amplifier on them during performance.

13. Input level control [INPUT LEVEL A]

• When this control is at “10", the A channel will
reach its rated power output when the input signal
is at a level of + 4 dB, Use this control when running
the amplifier in BRIDGE mode.

• The calibrated markings on the front panel indicate
the amount of attenuation applied to the input
signal. The allows proper volume setting of the
speakers when the input signal source is at its
rated level.

14. Input connectors [INPUT A, B +4 dB, 40 kHj

• Two types of input connectors are provided :
XLR-type connectors (female) and 1/4“ tip
ring-sleeve phone jack.

• These input connectors are connected in parallel
internally. Do not connect more than one input
signal to these connectors at the same time.

• When using amplifier in bridge mono mode,
connect the input signal to A channel only. Any
signal connected to B channel will not be passed.

9. Output terminals
[OUTPUT MAX LOAD 400W/4il PER CHANNEL]

■ WP-1200

• 8 ohms

• 4 ohms

• Bridge (8 ohms)

...................................

.....................................

...................................

120W + 120W (RMS)

200W + 200W (RMS)

400W (RMS)

• When using in bridge mode, the + side of the A CH
output terminals becomes the hot side, and the +
side of the B CH output terminal becomes the cold.

■ WP-1400

• 8 ohms ..................................... 240W + 240W (RMS)

• 4 ohms ..................................... 400W + 400W (RMS)

• Bridge (8 ohms)

.......................................

800W (RMS)

• When using in bridge mode, the + side of the A CH
output terminals becomes the hot side, and the +
side of the B CH output terminal becomes the cold.

CAUTIONS :

• Do not connect the output channels in parallel.

• When using bridge connection, always use
minimum 8 ohm speakers. Never connect the
speakers between + and — of A CH, or + and

- of B CH.

10. Ground terminal [GND]
An external amplifier ground terminal.

11, AC Power cord

120V AC 60 Hz - approx. 6.5 feet.

- 4 -

CONNECTIONS

For 1 input ; [BRIDGE]

• WP-1200

For 2 inputs : [STEREO]

f¥l

STEREO A-B

INPUT [A]

[A] CH Speaker

[B] CH Speaker

Speaker

• WP-MOO

STEREO A'B

INPUT [A]

Speaker

[A] CH Speaker

[B] CH Speaker

CAUTIONS :

• Connect the speakers after selecting either bridge or
stereo.

• When using bridge connection, never connect the
speakers between + and — of A CH or B CH.

I Connection of Plugs and Connectors :

1. Input connector {3-pin XLR-type female connector}

C (cold) H (hot)

input terminal

2. Tip-ring-sleeve phone plug

Hot

Ground

i]

No,1
□round
No.2

2 hot

No,3

cold

[Male]

C (cold)

Cold Solder Eteidundl

Shielding wire

- 5 -

RACK MOUNTING

1. Remove the screws which are inside the rubber feet,
then detach the feet from the bottom of the amplifier.

2. Mount .the power amplifier to the rack as shown
with four optional rack mounting screws (not supplied,

M5X12).

o

Rubber feet

Note

When transporting the machine while mounted in a
rack, the rear of the amplifier must be secured to the
rack. Use an angle with a thickness of at least 2 mm.

Rear-fixing angle:
Local procurement

A Rear-fixing angle for mounting side of rack.

B Rear-fixing angle for mounting on bottom of rack.

C Rear-fixing angle for mounting on rear of rack.

I c

- 6 -

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SPECIFICATIONS

WP-1200 WP-1400

Power supply :

Power consumption :

Rated power output :

Mono-bridge output : 400W (8ii continuous output)

Frequency response :

Total harmonic distortion :

Crosstalk :

Intermodulation distortion ;

SN ratio :

Input level ;

Voltage gain :

Approx, 770W at the rated output of 200W
(RMS) + 200W (RMS)/4a

120W + 120W (8ii continuous output)

200W + 200W (4ii continuous output)

0,3*/. or less
(8Î2, 120W + 120W, 20 Hz to 20 kHz)
0,3*/. or less
(4n, 200W + 200W, 40 Hz to 20 kHz)
0,3*/. or less
((BRIDGE) 8fi, 400W, 20 Hz to 20 kHz)

0,3*/. or less
(4n, 200W, 60 Hz : 7 kHz = 4 : 1

27.2 dB

120V AC, 60 Hz

Approx. 1500W at rated output of 400W
(RMS) + 400W (RMS)/4i)

240W + 240W (8ii continuous output)
400W + 400W (4ii continuous output)

800W (8ii continuous output)

20 to 20,000 Hz +0, -0.5 dB (at 1W Output)

0.3*/. or less
(8ÎÎ, 240W + 240W, 20 Hz to 20 kHz)

0.3*/. or less

(4Ü, 400W + 400W, 40 Hz to 20 kHz)

0.3*/. or less
{(BRIDGE) en, 800W, 20 Hz to 20 kHz)

60 dB or more (20 kHz)

0.3*/. or less
(4ÎÎ, 400W, 60 Hz : 7 kHz = 4 : 1

100 dB or more (DIN)

+4 dB (continuously variable) balanced

30.3 dB

input impedance :

Connectors :

Dimensions :

Weight ;

40 kii (balanced)

Input;

3-pin XLR-type connectors (female), and 1/4" tip-ring-sleeve phone jack

Output:

Screw terminals, (5 way binding post)

18-7/8" (W) X 4"{H) X 15-7/1 6" (D)
480 (W) X 102 (H) X 393 (D) mm
(Height includes rubber feet and depth
includes rear panel protection angle)

Approx. 26 lbs. (11.8 kg)

18-7/8" (W) X 5-3/4" (H) X 15-7/16" (D)
480 (W) X 146 (H) X 393 (D) mm
(Height includes rubber feet and depth
includes rear panel protection angle)

Approx. 38.3 tbs. (17.4 kg)

- 8 -

APPEARANCE

WP-1200

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- 9 -

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-10-

Panasonic

Panuonic Communicationa & '
Syatama Company
Audio-vMao System Group
Professional Audio Division

6550 Katella Ave, Cypress. Ca 90630
(7M) 373-7200

Matsushita Electric of
Cenada Limited
Industrial Audio Department

5770 Ambler Drive. Mississauga.
Omario. L4W 2T3
[phone]

Panasonic Salas Company,
Division of Matsushita Electric
of Puerto Rico. Inc.

San Gabriel Industrial Park.
65th Infantry. Ave. KM, 9.5
Carolina, Puerto Rico 00630
[phone]

N0991-0 YWA80A2548AN

Printed in Japan

® 17