Toa DA-250D - Page 3

Extremely high amplification efficiency of 80-90%,
resulting in reduction in power consumption by more than
60% compared with Class-AB amplifiers.
High efficiency
The DA-250 Series is 1-unit size and the DA-500 Series
is 2-unit size, and they can be efficiently mounted on a
rack, so they require only a small installation space.
Because the amplifiers do not generate much heat, 5
units can be stacked together in a rack.
Compact design
Each of the channels has its own power supply. If the
power supply of Channel 1 should fail, this won't affect
the operation of Channels 2-4 (Channel 2 in case of
DA-250D/DH). It is also possible to use one of the
channels as a spare amplifier.
Independent power
supply
The DA amplifier has a comprehensive protection circuitry
for protection against excessive current flow due to
overload, short circuit, unusual DC voltage output, and
heat sink temperature rise (DA-250D/DH, DA-550F/
500F-HL: over 100°C, DA-250F/FH: over 110°C).
High reliability
Installation has become much easier thanks to the
lightweight design.
*TOA comparative data (weight/watt)
Amplifier with
world-class lightweight
design*
Stands up to extended hours of operation. The DA
amplifier has undergone a large number of rigorous tests
to prove its durability. In addition, TOA has been
conducting a “non-stop driving test” of the DA Series.
Highly durable
Conventional AB-class Amplifier
DA Series Amplifier
Efficiency (%)
Output (%)
100
90
80
70
60
50
40
30
20
10
0 2040 60 80 100
Efficiency vs Output
Power Amplifier
Power
Supply
Power supply from transformer
Conventional Amplifier
Power Amplifier
With built-in power supply
AC power supply
DA Series Amplifier
Power
Supply
Power
Supply
Power
Supply
Power
Supply
FEATURES
Conventional Amp.
DA-250 Series Amp.
DA-500 Series Amp.
Total: 16,000W
41U
Total: 16,000W
21U
Total: 16,000W
19U
Inside of DA-250F/FH model.