Panasonic RAMSA WP-9055 User manual

Panason ic~
2-channel power amplifier
50W (RMS) + 50W (RMS)/B ohms
WP-9055
Operating
Instructions
Befo r,: attemp: I ()g 10 use I e produc(, pl ease read these Ifl S1r ucl ,o s com pletely
FEATURES
• This unit is compuct and will fit into a single rack space .
• The WP-9055 in 2-channel power amplifier prOVIding
continuous outputs of 50 W (RMS) + 50 W (RMS)
(THO 0.05% or l es s for 8D. l oa d 20 Hz to 20 kHz)
employing electronic balanced input c :r ,~ults.
• In bridge mono mode, the power amplifier prOVIdes a
100 W (RMS) outpu . (THO 005% or less , for :6 D.load
20 Hz to 20 kHz)'
• The inpul circuit IS electronically balan ce d employin g
an operaTIonal ampl iii er of exce'lent irClnsien r re sponse
and
Wide bandWidTh. As a result, deterioration of
response caused by the transformer and the effect of
induction 'Wise ;j re minimized
• Two tyPflS of input connectors are provided on each
(I,annel : X til-type connectors (female) and 1/4" TRS
phone jacks
• Output level can be mon itored by LEn's .
• Remote monitor outrl:ts are prOVided on each channel.
These include VL, meter outputs and external access 10
relay contacts allowing cOf)',lIlete indication of operating
status
of amplifier
• The amplifier is protected by a VI-type energy limiter
(voltage/current sensing protection Circuit) that limits
the power supply in the evei'll of a short circuit and cuts
off th e output in the ev e nt 01 overheating or mal·
function.

READ THE FOLLOWING INSTRUCTIONS BEFORE USE
• This uni( sho Id ve in st alled on a rig id, at sur a ce or
secured in a rae .
• Do at Instal t" e unit wi th the rear Side lachfj down .
• Do not put any obiect on lop of the unl"
• Due to the IohJling ci rc uit Iflcorpo ra ed, no sound is
produced for 4 D 6 sec on ds attr., tu rning on the power
supp y
• Alwa'l s use ~ ::lower source of adequa ,2 capaCITY
• Do not turn on the pow er of mu lt iple power ampl ifiers
at the s am e ti rr e Nev er allow th e ventilai 'on ho le s on
the
top and bottom of the amplifier to ge t obstruct ed
in any way.
, T~~.s unit is self-cooled. Always be su re there is adequate
ventilation In installation. Nev er block the vent holes on
the
top and bottom.
• To clean the amplifier, wipe It With a dry cloth . If the
ca se is very dirty, wipe it wi h a ClOth dampen ed i.
wat e or mild soapy water, hen \IV ipe dry thor ough1 '1.
Never use so lvents or chern i ca l cloth ; Sllll,'urly, never
spray 1$, ·( tlcldes as they I lay cause di sc oloration or
peeling.
• I
i any trou ble IS found, disconnect '(h-: POWEl- cord and
cont act your de aler.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE
THIS APPLIANCE TO RAIN OR MOISTURE,
MAJOR OPERATING CONTROLS
• Front panel:
--. .
~ j~~ . ";;";".
J r~ . .... rw. ...... __ ... _ • •
• Rear panel:
- 2 -

oPower switch [POWER)
• The power ampll' !r reaches the operating conditions
with
in 4 to 6 seco nds after lurn I ng on the Power
switch, due to a rn utlf,g eireu it which prev en ts switch-
in g noise al power-up,
CAUTION:
When using the WP-9055 in a system with other
equipment such
as a mixer, equalizer, crossover,
etc" always
turn the amplifier on last as switching
noise from the other equ ipment can damage the
speakers.
Sim ilarly, at system power-down always tu rn the
amplifier off first.
8 Power ON indicator lamp {POWER] (red)
Indicates that the
amplifier is turned on.
o Protect indicator lamp [PROTECT] (red)
This
'EO indicates thai the mutmg circuit IS activated
and
trerefore sound cannot be produced at the output
This occurs for 4 10 6 ~cconds when the ampl ifier IS
turned on, and also during overheating or any malfunc-
tion that may cause dll:nage to the sp eakers.
o Peak level indicator lamp
[PEAK (red) CAl , (ID 1
Sound is distorted as soon as PEAK lamp (red) lights.
Shou
Id thiS occur, el ther adjust t he output level of
the mixer or adjust the power amplifier Input Level
control so that the PE AK LED turns off .
" Signal level indicator lamp [SIGNAL (green) IKI , [[I]
Ugh IS when the sign al level reaches - 20 dB below the
rated output level.
o Input level control [INPUT ATT @, ~)
• When this control is at "0'" the amplifier Will reach
iTS rated power output when the input signal is at
a level OL + 4 dB.
• The calibrated markings on the ~rom panel indicate
the
amount of attenuation applied to the input signal
in 1 dB steps up to -19 dB This allows proper
volu'ne setting of the speakers when the input signal
source's at its rated output level.
•
No sound is produced when the; control is ir' the
" 00 "position
oI nput connectors [I NPUT @, lID]
• +4 dB 40 kn 8a"lnced.
• The Input conllc;ctors are
of two different types
3-p
in XLA-type G'lr'nectors (~emale) and 1/4" tip-
ring-sleeve phone Jacks.
• These inp ut connectors are CO'lnecTed In parall el
mtsrnally . Do not connect more than one input signal
to these connectors at the same time,
• When using am plifier in bridge-mono mode, connect
the Input signal
TO ~ channel only Any signal
connected to [ffi channel will (lot be ::,assed.
-3-
(i) Output terminals [SPEAKER 8.11 MIN (8], lID]
.8.11 50W+50W
Bridge 16.11 lOOW,
• When using in bridge mocil', the + side of the [Aj Cr-:
oul~.Jt terminals becomes the hot side, and the + Side
of the I]) CH ou tput terminal becomes the cold,
CAUTIONS:
• Do not connect the output channels in parallel.
(See fig_)
• When using bridge connection, always use 16.11
speakers. Never connect the speakers between + and
-
of [AI CH, or 1m CH.
0
[[1
0 0
DE :
:~O
r-
-0
0-
-0
C or(l. ~c t
Corf~CI
(stcr 00 I (bri
dge monol
o Remote monitor output connector
[MONnOR [AJ, lID J (4-pinl
LJo
Connect thiS termind: for remOTe monitoring of the
amplifier output.
• The rem ote monitoring o pe rates as soon as t 18 mut Ing
is released after switching on the power supply.
(I) Mode selector ~witch [STEREO gj - [[]
MONO ~ . lID
BRIDGE IKI ONLY
• Set this switch according to the application.
• See page 4 for hookup me thod of each mode
• When using either Mono mode or bridge mode, the
input si gna I n' -1st be applied to the IAJ channel on Iy.
4D Ground terminal [GND]
An externaI ampl ifier ground terminal.
•
Turntable ground leads may be connected here,
Ungrounded turntab,es may produce hum-noise.
f) BREAKER [AC MAIN BREAKER] (red)
• The AC circuI[ breaker wi II trip when there is an
overload or excessive Input.
•
Turn off the power immediately and deterrl :ne ,he
cause (shorted speaker wires, excessive or distorted
input signal. etc.)
• After the malfunction has been corrected, depress
the circuit breaker knob anD Turn the power back on.
• If the breaker trips agam and cause cannot be deter-
mined, contact
your dealer or an authorized servi-
center,
4i) Power 5upply cord
• 120 V AC 60 :1/ Approx. 8,2 feet
.. Rear panel rubber feet
These are rubber feet to protect the Input and output
terminals against dama ge, However, do n01 stand the
power arrpllfier on them dur:ng performance.

C ONN ECTI ONS
MONO
1 input / 2 outputs
(same output signal on both L6l and llil )
STEREO
2 separate inputs / 2 separate outputs
IIIII
STEREO MONO BRIDGE
A-B A-B A ONL Y
[AlCH Speaker
...
[IDCH Speaker
STEREO MONO BRIDGE
A·B A'B A ONLY
l
~ CH Speaker
~
BRIDGE
1 input / 1 output
CAUTIONS:
+
(ru CH Speaker
STEREO MONO BRIDGE
A'B A·a A ONLY
@CH •.
T
lID CH Speaker
• Connect speakers after sel ec ting t e Mode s el ec tor switch as shown above.
• When using br idge connection, eve r conn ec t the\ sp ea k er s betw een + and - oi A CI-I or B CH
-4-

• Connections of Remote Monitor Output Connectors:
(Example)
+14dB :lOO rl
lopt imum impedance 7 5k rll
Mon ito r ou tp ut
ter m In~o' A. B
2 Ground ing
3} Relay contact
4 Icontacr capac ~y up \0 DC24V 1 A)
2
In this co nfiguration, power wi ll be supplied to the VU met er
la mp wh en the relay contacts between pins 3 and 4 are closed,
Therefore, when the muting circ uit is activated due to power-
up or an amplifier m ,, ':unction, the light will go out. So in
combination with the external VU meter, this allows remote
monitor'ng of amplifier signal and status
• Connection of Plug and Connector:
1. Inprt connector (3-pln XLR-type connector, male)
C kolc!) H (hot)
1 f@ W -Screw
~i~J,~~l
IGroundl~gl ~ _ ' ; I
W",,'gof
Input terminal J
2, Tip-ring-sleeve phone plug
• Protective Cap Installation (Option)
A fler adJust rn g the Input level co ntrols, I nSla II the
protect ive cov ers to protect t;-.c con(ro ls from temper 10'19
as follows'
1, Detach he knobs f om the from panel .
2. I nse (t e prote cti ve caps (OP Tion) in the ho les ,
-6-
No.1
grou nd
No .2
hot
No.3
cold
[Male)
VU meter
( with bu ilt- .n rectifier)
+
Ilium ination lamp
, .... _--+- lor VU meter
Power supply for
IlIumlnetron lamp
3, Nylon connector for monitor output (4-pin) [option]

RACK MOUNTING
1. oose the fi xing screws and detach the four rubber ee
from th e bo to m.
2. Insert the mounTing clips In the holes for the rub ber
feet,
3 o un t th e power amp l ifi er to the r ac k with io ur rack
m ounting screws IM5 x 12) (not provided)
Rubber f
ee t
('j/
Le.ef nuts
leaf ours
Screws
Remo ve he rear ar el rubber feet.
lear · fi xing angle:
A, Rear·flxing angle fo r o un tlng on the side of rack
3 , Rear-fiXing an gle for mou nti ng on lhe bott om of rack
C . R a r·! IX i ng angle for m oun! I ng on t he r ea r of rack
- - - -.: :: :. ~
-_. _-~ ' ~A
. -~
I ' •
~ • ~c
15/64 _4 ' 1/10"~B
16mm -10mm )
W P· 9055 Rear view
14.1/4" (374mml
16·9116" (420mm)
1·1/2" 13 8mm)
Not e: When transpo rti 19 the machine in a rack·m ounted
manner , rear fi Xi ng angles mu st be installed, so that
he rear of the amp' ifler will be se cure during
transportalio .
Use an an g le wi th a thickness of at least 2 mm ,
- 6

SPECIFICATIONS AND ACCESSORIES
• Specifications
Power supply:
Power co
nsu m ptio n:
Rated power output:
Bridge output:
Frequency response:
Total harmonic distortion :
Crosstalk:
I ntermodulation distortion :
Damping factor :
Signal-to-noise ratio:
Input lellel:
Voltage gain:
I nput impedance:
Remote monitor output :
VU meter output:
Relay term ina Is:
Connectors:
Dimensions:
Weight:
Finish:
• Accessories
Mounting clips
Operating Instructions
BLOCK DIAGRAM
MODe $.'''''
, Ucrteo
2 ...,ONO
J eI/I.;I1)t
lfliP-UTAH
O- co
120 V AC 60 Hz
Ap
pr ox . 245 W at th e I 'a ted a tput of 501/1/ + 50 IN 8.11
50 W + 50 W (8 .11 Continu us o ut put)
100 W (16D. Co ntinuo us outpu t)
20 to 20.000 Hz ± 0.5 dB
Less th an 0.05 % (8 n, 50 W + 50 W, 20 02 0,000 Hz)
Le ss than 0.08 % (Bridge 16.12, lOOW, 20 to 20,000 Hz
Mor e than 60 dB (20,000 H z)
Le ss than 005 % (8 n,50 'vV. 60 Hz 7,000 Hz = 4 . 1)
More than 1
00 (8 n,1 kHz)
More than 1
00 dB (DIN- AUD IO W." D)
+4 dB
24 dB
40 n (Balanc ed)
+14 dB 300 n (7.5 Ulop tim um i
No·voltage make co tact (conta
ct ca pacity: DC 24V 1A)
Input: 3·p in XLR·t yp econn ec tor (fe ma le)
1/ 4" Tip-ring-s ee ve phon e jack (3-p'n conne ct io n)
Outn'Jt Screw terminals
'3-7/8" (W) )( 2- 5/16" (H) )( 13-1 /8" (D)
[480 (W) x 59 (HI )( 333 (0) m ml
Ap prox 19 .t;" (8 .5 kgl
P
ane l'
Cab 'net
Ojla ck alumi e ha ir line
Dull blac. pa inti ng
4 • Option (WP-Q01)
Connector pin
Nylon connector
Protective cap
,.,-.-:+- --- -1
-s ----r-=::::-:-:-l
-S ---L=-.J
- 7 -
~>-t-----j
~ ..... .J'""1- ' JOY AC
..,- --~ 60Hr
po·......,.,. IWllCh ",C.luWo
8
2

TYPICAL PERFOR MAN CE
• Output versus distortion • Frequency
versus output distortion
1
3
0.0I
0003
0. 00 1 I I
10
APPEARANCE
E
E
N
!2
~
an
100 300 = lK
Output power (WI
- +
II:)
~
c
o
OJ
<0
'; -
Q)
"0
::>
9
::>
o
s
0
5
16·9/16" 1420mm)
,
,
:
'00 300
o----+ 'Ti----- '-' nn m Cl fT
~ I I ~
I 1
,nnon 'u nnn 'u n' un nu ' nn nI I
; I HH nnLJn ' DLJnLJ ' unnn U ; ~n:UnH I:
:U UULJ LJ :U 'U LJULJ ; :
J 0000000 00 0000 kJ
B B
Panasonic .;t
18-7/S" (480mm)
18-5/1S" (465mm)
Panasonic Industrial Company
Audio-video System Group
Professional Audio Department
6SS0 KSletia Ave. Cypress. Ca 90630
1714) 895-7200
Matsushita Electric of Canada Limited
Ind "strlat Audio Department
5770 Ambler Drive, Missi ss au ga ,
Ontario. l4W 2T 3
Pamuonlc Sales Company,
Division of Matliushlta Electric
of Puerto Rioo, Inc.
San Gabriel Industrial Park.
65th Infantry Ave. KM. 9.5
Carolina. Puerto Rico 00630
[phone]
c
.g
'-
~
o
0.05
0
10K 30~ 100~
Frequency (Hz I
PanasOnic Hewaii, Inc.
99-
859 Iwaiwa SlIcel
P. O. Sox 774
Honolulu. HawaII 96808-(;1)4
18081 488-1996
(4161624·5010 B0686·4079 A80A0689CI\ Prtmed in Japan