Panasonic Ramsa WS-A240 User manual

SUBWOOFER SYSTEM
WS-A240
(Subwoofer)
WS-SP2A
(Subwoofer Processor)
I WS-SpPA | i Ng
Panasonic.
Instructions
Please read these insiructons completely before operating is equipment.
WS-AZ40
RP PPS
The RAMSA Subwoofer System consists af the mode W5- The WS-4240 enclosure is maed from a resin that is
A240 Subwoofer and the model WS-SP24 Subwoofer virtually indestructable and incorporates a recessed handle,
Processor. interlocking stacking ribs and internal mounting hardware
for convenient transport and installation. & metal grill cover
The WS-4240 is a bass-reflex type loudspeaker system in provides protection for the driver component.
corporating a 12" (30-cm) driver unit, It is designed to be
used as a madular subwoofer component along with the The WS-SP2A is designed specifically for use with the W3-
WS-SP24 subwoofer processor, which includes signal A240 loudspeaker system in VLF (subwoofer) applications.
processing far subwoofers and the main loudspeakers. Two balanced inputs and four unbalanced outputs are
provided Output channels A and B include three selecta
WS-A240 subwoofers are small in size for their output capa- ble signal processing modes for use with different main
bility, and may be combined in compact arrays to take max- loudspeaker units.
imum advantage of mutual coupling effects far high autput
applications. The compact dimensions of the WS-4240 al- The subwoofer output is derived from an isolated sum of
low it to be unobtrusively installed in virtually any en- the A and E inputs, and includes a high pass filter, signal
vironment, processing far the WS-A240 and selectable low pass filters
with 240B per octave Bessel response for each of three
The WS-A240 will accept a continuous program input of different main loudspeaker types. The VLF (subwoofer)
AQOW. The WS-SPZA provides high-pass protection from output includes à fixed gain stage to optimize sensitivity
infrasonie frequencies, very low frequency (WLF) signal in the WLF range. The WS-SP24 Subwoofer Processor also
nrocessing, and a choice af three different signal process- provides a full-range summed output, which may be used
ing functions for two channels of main loudspeaker ta drive distributed system power amplitiers.
systems.

NAMES OF COMPONENTS: anse e ERR ano Ki ta ae HAM Te ua DeL M MUGA Cru RD s lisse paoi 2
LOUDSPEAKER INSTALLATION. nope baas an eaaa US janna bé cup eae Rav Eh x bt RS tan EN agi Nga gawaa 3
BEFORE CONNECTION i sh nec ais anaa eoa hore tx code mea Merk cete b COREL DEO ERE aaa EN 3
POWER HANDLING CAPACITY sin sens UA E AEn rn eeu one niv iria ees 3
CONNECTION: OF SPEAKER CABLES aus eu Ven raura ao aT Ya Tao Re uS SEV e i vd de Faktor eau aana 4
USE OF XLR CONNECTORS assiste ga nego vance a na aana drap op aa yea aka gena deve idees ote a EE AN Na 5
BLOCK: DIAGRAM (WS-SP2A} -o.i reser sasinan ee None AR n Fab vex Ug rers danawa nas anenun anangga aaa EUR V RAE YS ent 6
TYPICAL SYSTEM PERFORMANCE decoration 6
RACK MOUNTING BRACKETS «rers et 8992 anana aneh n E diame dI Ead NENGA Eni nan degag a kana aga np ain 7
TYPICAL APPLICATIONS... eerte nn coe bn Ree GEN cux BETA NONG bx Ha Sae kaen aa KA Fa a aga OR Ee Kl d ke 7
SPECIFICATIONS (WS-A240, WS-SP2A) .............. eese seien eene nne sanan nnne ene nns aas on baa astra enaa 10
INFORMATION FOR QUALIFIED SERVICE PERSONNEL ss 11
RECOMMENDED FUNCTION SELECTOR SETTING ss 12
MIXER AND SPEAKER LIMITED WARRANTY ................ eee nne ee enne netta root aano no nah aa noon nonna us 13
APPEARANCE
CAUTION
RISK OF ELECTRIC SHOCK
OO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELEC.
TRIC SHOCK, DO NOT REMOVE
COVER (OR BACK) NO USER-
SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALI-
FIED SERVICE PERSONNEL.
The lightning flash with arrowhead
symbol, within an equilateral tri-
angle, is intended to alert the user to
the presence of uninsulated "dan-
gerous voltage" within the product's
SA 1965 enclosure that may be of sufficient
magnitude to constitute a risk of
electric shock to persons.
The seríal number of this product may be found on the
bottom of the unit.
You should note the seria! number of this unit in the
space provided and retain this book as a permanent
record of your purchase to aid identification in the event
of theft.
The exclamation point within an
equilateral triangle is intended to
alert the user to the presence of
important operating and mainte- Serial No.
nance (servicing) instructions in the
SA 1966 literature accompanying the appli-
ance.
Model No.
WARNING: TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS APPLIANCE TO
RAIN OR MOISTURE. X

NAMES OF COMPONENTS
* WS-A240
(D Threaded mounting holes M8 x 19 mm
(2) Ports
(8 Punched grille -
(4) Speaker 12" (30 cm!
e WS-SP2A
Power ON indicator lamp
(D
Power switch [POWER]
© © ©
Input connector [INPUT A, B]
+4 dB, 20kQ balanced XLR-type
Output phone jack [OUT A]
+4 dB, 6000 unbalanced
Output phone jack [OUT B]
+4 dB, 6000 unbalanced
Output phone jack [VLF OUT]
+4 dB, 600€ unbalanced
Output phone jack |A +B OUT]
+4 dB, 6000 unbalanced
Power cable
oc 8 © © ©
Ground Terminal [GND|

LOUDSPEAKER INSTALLATION
The WS-A240 is equipped with six M8 x 25 threaded in-
serts that are molded into the enclosure. All attachments
to the enclosure should use these fittings. For stand mount-
ing, two thumbscrews are provided with the WS-A240,
which should be handtightened only. For suspended appli-
cations, forged shoulder eye-bolts are recommended. DO
NOT substitute any other fitting for these critical load-
bearing components.
Thumbscrew
Forged eye-bolt
RAMSA Part No. XVPBF25FZ
When mounting WS-A240 loudspeakers to a wall or ceil-
ing. either by hanging or with brackets, they should be se-
curely attached to the building structure. This requires
knowledge of building construction and load-bearing capac-
ities. If this information is unknown, installers should seek
the advice of an architect or structural engineer before at-
tempting such attachments.
The loudspeaker systems can be mounted vertically or
horizontally. When mounting horizontally, remove the four
screws fitting the front grill, rotate the grill 90 degrees and
re-install. Do not operate the WS-A240 without the protec-
tive grill in place.
When multiple WS-A240s are to be installed, best perfor-
mance will be realized when units are mounted in close prox-
imity to one another. Because high sound levels at low
frequencies will be realized, special care should be observed
to assure that structural resonances and vibrations do not
impair the sound quality.
BEFORE CONNECTION
Switch off power amplifier{s} before connecting the loud-
speaker(s}. After loudspeaker connection, be certain that
high level audio signals are not present before switching the
amplifiers on.
The nominal impedance of the WS-A240 is 8 ohms. Two
loudspeakers in parallel will have a nominal impedance of
4 ohms, which is the lowest impedance most amplifiers are
capable of driving. Be certain that the number of loudspeak-
ers connected in parallel does not result in a load impedance
that is below the rating of the amplifier.
Use the largest wire gauge speaker cable that is practical
to minimize DC resistance and losses due to cable length.
Note that the lower the impedance of the total speaker load,
the greater the losses in the wire.
Observe
loudspeaker
polarity.
The
ptus
|
+}
and
minus
|-]
terminals
of
each
loudspeaker
are
marked
red
and
black,
respectively.
A
positive-going
signal
applied
to
the
red
ter-
minal
will
result
in
forward
movement
of
the
loudspeaker
diaphragm.
When
two
or
more
speakers
are
used,
make
sure
that
the
polarities
of
these
speakers
are
the
same.
a
ama
a
a
aaa
POWER HANDLING CAPACITY
The rated power capacity of the WS-A240 is 400 watts in
accordance with the test procedure outlined in EIA (Elec-
tronic Industries Association) RS-426-A. This test method
employs white noise through RC high pass and low pass
filters to simulate the energy-frequency spectrum of typi-
cal program material. It is an excellent indicator of the ther-
mal power capacity of a loudspeaker system.
Because the WS-A240 is a subwoofer, it is subject to
mechanical power limitations, especially at very low fre-
quencies. The WS-SP2A Subwoofer Processor includes
à high pass filter that protects the WS-A240 from exces-
sive mechanical displacement at sub-audio frequencies.
The WS-SP2A should be used with WS-A240s at all times.
CAUTION:
Certain signals may result in excessive displacement of the
driver diaphragm, thereby damaging the loudspeaker. The
following conditions of operation should be avoided at all
times:
1. Shock noise caused by energizing or de-energizing mix-
ing consoles and peripheral equipment when the WS-
SP2A and the amplifiers are powered up.
2. Shock noise resulting from the connection or discon-
nection of input/output connectors with the system po-
wered up.
3. The use of condenser or omnidirectional microphones
for vocal applications without appropriate breath-pop
screens and/or high pass filters.
4. The switching on/off of phantom microphone power
with level controls up.
5. Continuous operation at very low frequencies from an
oscillator, synthesizer or other program source when
doubling distortion is evident in the loudspeaker.

CONNECTION OF SPEAKER CABLES
There are two types of speaker input terminals which should be selected according to applications. (The three terminals
are internally connected in parallel.)
* Use of push-terminals
NOTES:
* The cable which fits in the hole of the push-terminal,
should have a diameter not larger than 7/647 (2.6 mm).
To ensure proper fit to the terminal, a cable diameter
From amplifier of less than 5/64" (2 mm) is recommended.
output terminals. * The sheath of the speaker cable should not be inserted
into the terminal hole.
e When the speaker cable is of a stranded type, the core
conductor should be twisted before inserting it into the
terminal hole.
Depress the push-terminal and insert the
speaker cable from the ampltilier into the ter-
minat hole. The plus ( + } side is marked red and
the minus (- | side marked black. NOTES:
e Connect the speaker cable to a tip-sleeve (TS) phone
plug, then connect it to either jack.
* Use of phone jacks e The other jack is then used when installing an additional
speaker in parallel.
From amplifier
output terminals.
~N TS phone plug
VM
Pa rp =
NN { ||
wa The speaker uses a TS phone |
plugs as an input terminal. When Plug cover i-} (sleeve)
N connecting, make sure that the |
3 polarity of the TS phone plug |
t matches the polarity of the ampli- i
* Installation of additional speakers | fier output terminals (speaker ter- Speaker cable {+} (tip) |
| minal) as shown in the illustration. l
Connect the speakers in parallel as shown below. NAN I NGANG AE ath speed ait e ee a HRS J
When two speakers are connected in parallel, the combined
impedance becomes 4 ohms. In this case, the speakers
should be connected to an amplifier which is designed to
drive a load impedance of 4 ohms or less.
From amplifier output terminals.
NOTES:
+ When three or more speakers are connected in parallel,
the combined impedance becomes 3 ohms or less
which requires a special type of amplifier. Therefore,
do not use more than two speakers for parallel con-
nection.
+ If the combined impedance of the speakers is lower than
the specified impedance on the amplifier to be used,
the sound from the speakers may be distorted or the
amplifier may be damaged.
* When two speakers are used in parallel, make sure that
the polarities of these speakers are the same.
From amplifier output terminals,

USE OF XLR CONNECTORS
This speaker may be fitted with an XLR connector which For connection, use XLR plug.
is often used for professional applications.
(D Remove the phone jack mounting plate and pull it for-
ward. Disconnect the wiring.
Phone jack mounting plate
Male-type Female-type
XLR plug XLR plug
Binding head machine
screws (+), M3x8
Use these screws for
mounting the XLR
connector, From amplifier To the second
speaker output speaker in parallel
terminal connection
sce eee m ca meam EQ ose gana aan al jai a a st i ajang a hag
@ Solder the teads that were disconnected in step (D as
shown below | €p on pin 2, © on pin 3), mount
a female-type XLR on the top and a male-type XLR on
* Disassembly diagram of typical Female XLR plug
" Screw
the bottom. 1
Bushing 1 Clamp
Q
<
4
^
,
Insert
set-screw
& > ? 4
Xh
|
æ
MPertooth
washer
` i Latch,
Shell ^
Insulating tube —"
Black (-) ulating tube
(No.3 pin)
rend
RPM
*
Disassembly
diagram
of
typical
Male
XLR
plug
(No.3
pin)
{No.2
pin)
Screw
4
Red
(+)
m
oda
1
|
Clamp
(No.2
pin)
4
=” Insert set-screw
"m
m poc
ES i
Shett —^ CO
Insulating tube ^ L'e
Female Male
XLR XLR
(8 Secure the XLR connectors with the screws which were
|
!
||
||
l
l
||
|
|
[
!
||
I
I
|
i
i
!
|
||
l
I
|
I
]
l
|
[
l
|
|
|
|
i
[
1
|
i
'
s |
removed in step (D), as illustrated. |
{
l
A
Insulator —*
eee —— —— wee eee eee Ae de demo ee oe ee ee woe 7
Female-type
XLR
NOTE:
* When using XLR connectors, observe the polarity as
Male-type ride r^g tapping shown below.
SLR M3 x 16
Use screws removed
in step (1). e
Se ee le cu uoc mm mem mm ee A Ka en oe ee ee os m ee € eur eus re a

WS-SP2A BLOCK DIAGRAM
High Pass
Function ^ e Wo Processor
Selector
30
à Zz
Input À M VLF
o
Output A
© + 4 dB
6000 UNBAL
+4 dB K Low Pass
20 kR BAL E Processor Processor
Function "77-—
Selector VLF Output
TE «4 dB
, PENANG 6002 UNBAL
Pin Connection :
Pin 1 - Gnd :
Pin 2 - Hot : 1 3
i
F
Function
H
Pin 3 - Cold & lector 2 8 v.
[«LET] A + B Output
* 4 dB
6000 UNBAL
High Pass
Function 1 Vo Processor
Setector a y
1 (Bi fasanansan Output 8
= 6062 UNBAL
input 8
* 4 dB
20 kf BAL
TYPICAL SYSTEM PERFORMANCE
The WS-SP2A performs both bandpass definition and sig-
nal processing within the bandpass. The frequency
response chart at left shows typical performance of one
WS-A240 under half-space conditions using the WS-SP2A
Subwoofer Processor adjusted for signal processing mode
three. The input signal was adjusted for a nominal 2.83
volts (1 watt at 8 ohms) at 80 Hz.
100
90
The WS-A240 voice coil was specifically designed to han-
dle high current at low frequencies, resulting in a thermal
power capacity of 400 watts (EIA RS-426-A). The mechan-
ical suspension components have been carefully selected
and balanced to enable an unusually large (12 mm) peak dis-
placement capability. The result is an extremely compact
subwoofer system of exceptional performance.
80
d8
Multiple WS-A240s may be combined in very compact ar-
rays served by a single WS-SP2A Subwoofer Processor,
with an accompanying increase in efficiency and exten-
sion of low frequency output due to mutual radiation ef-
fects (see Typical Applications).
70
60
Frequency (Hz)

RACK MOUNTING BRACKETS
A. 1 Unit Mounting
Bracket fixing screws
(accessory) M4 x 8
1. Remove 4 rubber feet. d à
Fix the rack mounting brackets A and B {standard
accessory) to the Subwoofer processor with the
attached screws.
3. Mount the Subwoofer processor to the rack.
Bracket A: part No. A2SA1036A4
Bracket B: part No. A28A1037B3
Rack
manting
Bracket
A
|
Screws
e
(not
provided)
Rubber
feet
7
B. 2 Units Mounting (not provided)
Remove 8 rubber feet.
Fix two processors with bracket C and screws.
Fix the rack mounting brackets to the both sides of the
processor with the attached screws.
Mount the processor to the rack.
e SN
Bracket fixing screws
{accessory} M4 x 8
Mounting screws
M4 x 8 (not provided) Flush head machine
screws MA x B
Bracket A: part No. A2SA1036A4
Bracket C: part No. A2SA1038A4 Rubber feet
F. :
q^ VA
$ f Z
Caution: Don't use screws longer A. | Bracket A Nang
than 8 mm. LOE Z ~
Bracket C Rack mounting screws $
L not provided) inot provided)
TYPICAL APPLICATIONS
SYSTEM A
Illustrated are two WS-A10 Compact Speaker Systems in
a two channel configuration, powered by one WP-9055 am-
plifier. The single WS-A240 Subwoofer is powered by one
WP-9110 amplifier in the bridge (BTL) mode. The WS-
SP2A Subwoofer Processor should be adjusted (by quali-
fied service personnel only) for WS-A10/WS-A240 signal
processing.
A Dut
B Out
LE Out WP-9055
WS.SP2A
Subwoofer
Processor
Main Out L
WS-A240
Subwoofer
CS RE Sku
WP-9110 1BTL)
Main Out R

folie
WS-A200 1x2)
TH
tus
Kow
ER EM
FETETIA
EET xEX
ofe ES
CGGOHBEBHE I5:
ra GÜ
Subwooter
Processor
SYSTEM F
This system is identical to System E, but configured with
two WS-SP2A Subwoofer Processors so that the VLF sig-
nals are a separate sub-mix controlled from the mixing con-
sole. This affords the ability to selectively introduce signals
into the VLF mix. which may be balanced in level against
the program mix for special effects. Both VLF amplifiers
are operated in the dual mono mode.
A variation of this design would employ both processors for
VLF processing, with the signal derived from the A and B
WS.A200 ix2!
WS-4240 Sub- woofer (x8)
SYSTEM E
System E is comprised of four WS-A200 loudspeaker sys-
tems and eight WS-A240 subwoofers. It is powered by three
WP-9220 amplifiers, each loaded to 4 ohms per channel.
The VLF amplifiers are operated in the dual mono mode.
The WS-SP2A should be set (by qualified service person-
nel) for WS-A200/WS-A240 signal processing.
mix channels driving part of the VLF amplifiers and loud-
speakers in a fixed-gain relationship with the main program
channels, and the balance of the subwoofers controlled by
a separate sub-mix from the console. The additional con-
nection is shown in gray. In this example, (2) WS-A240s
are operated from the A and B mix, and their amplifier in-
put mode switch is in the dual-channel position. An option-
al VLF signal processing device, such as a sub-harmonic
synthesizer, may be added to the VLF mix output ahead of
the WS-SP2A Subwoofer Processor for special effects.
WS.A240 Subwooter (x81
WS-A200 in 2t
300w
AE
we 9220
VLF Out Iser terti
& - 8 Out
To O«siributed
Sytiem Amph
INot Snow
B Oui
WS-SP2A
Subwoofer
Processor
WS-A200 ix2)
ENTRE
Es RR N
WP-9220
VLF Out
KIH Ll 3
WS-SP2A
Subwoofet
Processor

SYSTEM B
In this system, two WS-AB8O loudspeaker Systems in a two
channel configuration are powered by one WP-9110 am-
plifier. Two WS-A240 subwoofers are powered by one
WP-9220 amplifier in the dual mono mode. The WS-SP2A
Subwoofer Processor should be adjusted (by qualified serv-
ice personnel only) for WS-A80/WS-A240 signal
processing.
4 Qut
VLF Out
| IH fF 3
WS-SP2A
HEN Subwoofer
Maw Out L Processor
Main Out R
SYSTEM C
Two WS-A200 loudspeaker systems in a two channel con-
figuration are powered by one WP-9220 amplifier. The two
WS-A240 Subwoofers are powered by one WP-9220 am-
plifier in the dual mono mode. The WS-SP2A Subwoofer
Processor should be adjusted (by qualified service person-
nel only) for WS-A200/WS-A240 signal processing.
A Out
Ds
VLF Out
WS-SP2A
Subweoter
Processor
(se
Mam Oui L
Main Qut R
SYSTEM D
This system is similar to System C, with the addition of two
more WS-A240 Subwoofers and another WP-9220 ampli-
fier. The two VLF amplifiers are operated in the dual mono
mode and the WS-SP2A should be adjusted (by qualified
personnel only) for WS-A200/WS-A240 signal processing.
A Out
WS-SP2A B Out
Subwoofer
Processor
VLF
Qut
HE
NUNI
GIH nl d oa apii
WP-9220
Main Out L Main Out R
Nea
B= NUE
WP.9220
100w
[ $0.
TT
WP-3310
200W
200W
mim Ei
PARLA
ig AMI
WP-9220
WS-A200 1x2]
200W
200W
HA ET
WP-9220
200W
200W
HAL |
& TE
WP-9220
200W
200W
IH
(|
mam
e