PVAseries

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PVA
series
FEATURES:
Output stage in modified push-pull configuration
Emergency 24V power option
Test and priority inputs
Limiter
Subsonic filter
Variable speed forced cooling.
ADS s.j. Brzeziñska 50, 92-111 £ódŸ
tel. 042 674-77-10, tel/fax 042 674-40-08
www.ads.com.pl
[email protected]
PVA
series
This series of amplifiers are designed to work with a 100V line especially for sound systems installed in office
blocks, shopping centres, supermarkets, bars, public buildings etc. The main advantage of a 100V system is the
reduced thickness of the speaker cables compared to low voltage amplifiers. This is because the higher output voltage
allows a much lower current flow for the same power. Another advantage of the high output voltage is the amplifier's
ability to cope more easily with voltage-drop when using long speaker cables. On all PVA series amplifiers, the output
stage is powered by a low voltage allowing not only use with mains voltage, but also 24VDC (or 18VDC). Voltage
switching is automatic and completely silent. The output stage utilises a specially wound transformer to allow full
acoustic operation at high frequencies. A modified push-pull configuration is used for the output stage. This has the
advantage of working in a similar way to a bridge configuration allowing a decrease of the filtering volume by as much as
a half. In contrast to conventional push-pull configurations, our output stage is fully complementary, giving, amongst
other advantages, lower distortion, without losing the advantages of a push-pull configuration.
The output stage circuitry is protected with the same devices used in stage-amplifiers. This includes: thermal
protection, input and output transformer protection, short circuit and overload protection, return limiter and soft
switching (soft start). Thanks to these features, it can be used in far more demanding conditions and gives greater fire
and safety protection.
The amplifiers are equipped with priority inputs, switched automatically as soon as additional signals are
detected. The PVA series also has test inputs for connection of an ultrasonic remote control to test the efficiency of
connections. Balanced inputs allow the use of long cables without the risk of humming or mains distortion.
Subsonic filters protect the speakers which are, in this kind of installation, relatively low quality. This also
protects the amplifier from saturation of the output transformer.
The forced-cooling fan constantly adjusts its speed according to the temperature of the heat sink. The result of
this is that when the amplifier operates at low volume, the fan works at minimum speed or stops altogether, minimising
dust intrusion and increasing the amplifier's life.
Model
RMS output power 1%THD
Operating frequency
PVA 240
PVA 480
240W
480W
32Hz - 42kHz
32Hz - 30kHz
Supply current at 1/8 rated power,
pink noise
Supply current at 1/3 rated power,
pink noise
Filter storage
Max power dissipation
Socket input / output
Slew rate
Dimensions ( W x H x D )
Weight
4x120W
4x240W
32Hz - 42kHz
32Hz - 42kHz
PVA 4240
+4dB 1,23V
20kW
niesymetryczne, 10kW
symetryczne
Subsonic filter -3dB
Idle current draw (230V AC)
Max. output voltage
PVA 4120
2x480W
81 (38dB)
Input sensitivity (V RMS)
Input impedance
Power supply
PVA 2480
2x240W
32Hz - 42kHz
32Hz - 30kHz
< 0,2%
> 90dB
Distortion (THD) 1kHz, 100V OUT (80% rated power)
Dynamics
Voltage gain
Indicators ( LED )
Regulations, switches
PVA 2240
32Hz, 24dB/oct
Ready, Protect, Signal, Clip
FRONT: signal, vol BACK: priority vol, priority HPF 240Hz, priority mode (auto/manual)
230V AC +10/-15%
< 160mA
< 170mA
< 270mA
120-130V
1,1A
2,1A
2,2A
1,6A
3,1A
3,2A
20000m
F
600W
40000m
F
1200W
25V/m
s
20V/m
s
12kg
482x88x340
16kg
40000m
F
1200W
< 420mA
< 550mA
4,5A
2,2A
4,7A
6,3A
3,2A
6,5A
80000m
F
2400W
signal in, priority in / priority, control
25V/m
s
20V/m
s
40000m
F
1200W
80000m
F
2400W
25V/m
s
25V/m
s
482x88x430
16,5kg
25kg
21kg
28kg
ADS s.j. Brzeziñska 50, 92-111 £ódŸ
tel. 042 674-77-10, tel/fax 042 674-40-08
www.ads.com.pl
[email protected]
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