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P.A. POWER AMPLIFIERS FOR TABLE-TOP AND 19” RACK MOUNTING •
BALANCED AUDIO INPUTS WITH PRE-SET SENSITIVITY CONTROLS •
MATCHING TRANSFORMER FOR LOUDSPEAKERS WITH 100V, 70V AND 50V TAPPINGS •
EASILY APPLIED EMERGENCY EXTERNAL BATTERY SUPPLY WITH REMOTE SWITCHING •
SQ45 AMPLIFIERS
PA databook.qxd
BUILT-IN MONITORING FACILITY WITH VU METER AND HEADPHONE •
The SQ45 range of public address ‘high performance
audio power amplifiers’ have been designed to fulfil most
professional public address requirements. Due to their
architectural design and high degree of versatility, they
complement any tailored P.A. system; making them ideal
for multi-zone projects requiring amplification for a
variety of audio signals simultaneously.
Ease of installation, together with excellent ‘reliability’ and
service ‘accessibility’, have been optimized in their design.
The standard compact mechanical housing, for the range
of SQ45 amplifiers is designed to accommodate upto a
maximum of four individual power amplifiers.The
amplifiers are available in the following configurations:
•
•
•
•
•
•
LBB 1342/40
LBB 1343/40
LBB 1344/40
LBB 1346/40
LBB 1347/40
LBB 1348/40
- (1 x 100 Watt)
- (2 x 100 Watt)
- (1 x 200 Watt)
- (4 x 100 Watt)
- (2 x 200 Watt)
- (1 x 400 Watt)
LBB 1342, 1343, 1344, 1346, 1347 and 1348
Each housing uses a common power supply for all
amplifier modules, therefore saving both cost and space.
Each individual amplifier module incorporates two audio
line level inputs; a ‘Music’ input and a ‘Priority Call’
input.
To use the power amplifier as a a free-standing table-top
version, a top-cover plate type number LBB 1349/30 can
be ordered separately.
The ‘Music’ input with adjustable pre-set volume control
is ideally suited for distributing one out of several,
continuous background music sources.
The ‘Priority Call’ input with a fixed input level is used
for occasional paging and other calls.
An in-built relay switches the amplifier from the ‘Music’
input to the ‘Priority Call’ input. The ‘Music’ input is
SQ45 HIGH PERFORMANCE POWER AMPLIFIER
functional when the relay is activated (see diagram).
The change over from the ‘Music’ input to the ‘Priority
Call’ input can be controlled remotely if used in
combination with a remote switching contact. Such a
function can be achieved with the Philips’ SM30 Sound
Management System, or the SM40 Microprocessor
Controlled Distribution centre.
Due to SQ45’s built-in loudspeaker matching transformer
providing a choice of three line output voltages (50, 70
and 100V), large groups of loudspeakers, covering large
areas, may be connected.
The transformer coupled outputs are fed to the
loudspeakers via a Mate-N-Lok connector at the rear of
the amplifier providing ease of installation.
Philips
Communication,
Security & Imaging
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SPECIFICATIONS
LBB 1342, 1343, 1344, 1346, 1347 and 1348
SQ45 AMPLIFIERS
The mains transformer may be tapped for different a.c. mains voltages, 110,
127, 220-230 and 240V, and a D.C. emergency battery supply may be used
for emergency powering. The mains supply is connected via a 2.5 m long
mains lead, terminated with a 2-pole mains plug with earth contacts.
An additional feature included in all SQ45 range of amplifiers, is a balanced
‘Test Input’ facility, used for injecting a 20 kHz ‘pilot-tone’ to monitor the
amplifiers performance. If used in combination with the SM40 microprocessor controlled surveillance system, all amplifiers, loudspeaker cabling
and speakers will be constantly monitored.
SQ 45
1
2
3
1
4
2
3
0
4
VU
CALL
3
1
5
2
4
3
2
4
1
Loudspeaker line
Transformer
Test input
Test input
100V
70 V
50 V
0V
0V
0V
MUSIC
3
1
2 3
5
2
4
+
1
Mains Transformer
Fuse
Mains
Fuse
48 V
DC
56
Power
4
VU
Headphones
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SPECIFICATIONS
LBB 1342, 1343, 1344, 1346, 1347 and 1348
SQ45 AMPLIFIERS
Mains supply : 110, 127, 220-230 or 240V at 50-60Hz
Inrush current limiter : 30 A
(On delivery the amplifier is connected for 220-230 V A.C.)
: +48V polarity protected
(0 to ground)
Inrush current limiter : 1 A
Power output :
Vdc
Vdc
(min)
(nom)
42V
48V
64V
Power output
rel. to rated
output power
-4 dB
-3 dB
0 dB
VU-meter : ‘0’ mark = 40V +/- 0.5 dB at 1 kHz on 100V
output
Output Data per Amplifier
Rated output power 100W
(per IEC 268.3)
Emergency Battery supply
Power consumption (max)
at rated output power
at rated output power
-8dB (VU = 0 dB)
no audio signal
switch on delay time
Vdc
(max)
73V
+1 dB
: 4 x 100 W, 2 x 200 W, 1 x 400 W
: 1200 VA
: 500 VA
: 50 VA
: ≤ 4 seconds
Battery Supply 48V DC
at rated output -3dB : 10A
at rated output
-8dB (VU = 0 dB) : 5A
no audio signal : 0.6A
INPUTS
Audio (‘Music’) input
balanced
Input sensitivity
Input impedance
Priority (‘Call’) input
balanced
Input sensitivity
Input impedance
Surveillance (‘Test’) input
balanced
Input sensitivity
200W
400W
Max load capacity
100 V output
70 V output
50 V output
100W
50 nF
100 nF
200 nF
200W
100nF
200nF
400nF
400W
200 nF
400 nF
800 nF
Min. Load Impedance
(Ohms)
100 V output
70 V output
50 V output
100W
100 Ω
50 Ω
25 Ω
200W
50 Ω
25 Ω
12.5 Ω
400W
25 Ω
12.5 Ω
6Ω
Configuration
(per type No)
LBB 1342/40
LBB 1343/40
LBB 1344/40
LBB 1346/40
LBB 1347/40
LBB 1348/40
100W
1x
2x
4x
-
200W
1x
2x
-
400W
1x
The output circuit is protected against any misloading, short-circuit or being driven
with any frequency.
The amplifier can withstand switching on and off without being damaged while:
• the amplfier delivers full power.
• the amplifiers input and output are disconnected.
Type No.
LBB 1342/40
LBB 1343/40
LBB 1344/40
LBB 1346/40
LBB 1347/40
LBB 1348/40
: 0.5 - 10 Volt (adjustable)
: 10 k Ohms
: 1 Volt (0.5 Volt using jumper)
: 10 k Ohms
Weight (approx. kg unpacked)
11.5
12.7
11.6
19.3
18.6
16.4
Safety : according to IEC 65 and BS 415
: 500 mV (20 kHz)
for rated output - 20 dB
Input impedance : 10 k Ohms at 20,000 Hz
ENVIRONMENTAL CONDITIONS
Operating temperature : -10° to + 55°C
Storage temperature : -40° to + 70°C
Relative humidity : 95%
Dimensions (H x W x D) : 133 x 440 x 360mm ( 3U, 19”
rack height)
H = 133 mm (3U)
W = 440 mm (incl. 19” brackets W = 483 mm)
D = 360 mm incl. handgrips
Build-in depth = 310 mm (19” rack)
COLOUR
Cabinet : Dark mushroom
Hand grips : Grey
Signal-to-noise ratio : > 90 dB (typical) > 87dB (flat)
Cross talk damping : > 70 dB at 5 kHz
Frequency response
measured at 10dB below
rated output power : 50 to 20,000 Hz (-3dB)
Distortion (THD) : < 0.5% (at rated output power at 1kHz)
Radiation : acc. to EN55013
Immunity : acc to EN 55020
(council directive 89/336 EEC)
Power Bandwidth : 50 - 20,000 Hz (THD = 2%) (-3dB)
Monitor output : Headphone impedance
8 - 600 Ohms
This product is manufactured to comply with the radio interference requirements
of the Council Directive, 4th November 87/308/EEC.
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SPECIFICATIONS
LBB 1342, 1343, 1344, 1346, 1347 and 1348
SQ45 AMPLIFIERS
9498 974 05619 01-08
© 2001 Philips Electronics N.V.
58
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