4 CHANNEL POWER AMP TA 4D
OPERATING INSTRUCTIONS
7 |
P a g e
3.VoltageofSCRIPT1,Level(Phase)
20
50
100
100
200
500
1k
1k
2k
5k
10k
10k
20k
20
20k
0
0
-10
-10
-20
-20
-30
-30
-40
-40
0
0
10
10
-180°
-180°
-90°
-90°
0°
0°
+90°
+90°
+180°
+180°
Frequency
Hz
dB
dB
AkAbak (R)
Uin=0.707Vrms
lp1000, N=1=0, U1
hp1000, N=1=0, U1
2.VoltageofSCRIPT1,Level(Phase),Uin=0.707Vrms;lp140,N=1=0,U1
2.VoltageofSCRIPT1,Level(Phase),Uin=0.707Vrms;hp140,N=1=0,U1
2.2 Power Amps
2.2.1 Technology
The TA4 D is equipped with 4 independent analog FET power amp modules. Each module supplies
a continuous 1000 watts into 4 ohms. The controller card and corresponding program determines
the distribution of power to deliver the maximum power needed. The TA4 D power amplifier is a
high performance design achieved by 3 independent power output stages, making this product
more efficient than with any other conventional power amplifier currently available.
For example: to run a 3 way speaker system 1600 watts into 8 ohm would be available, plus 500
watts into 8 ohm plus 250 watts into 16 ohm. A total of 72 hand selected power transistors, each
featuring a Pmax=250watts for maximum headroom. Soft clipping circuits working in conjunction
with the operating voltage, limit the audio signals before each power amp, which enables the
power amp to always operate with a high damping factor while remaining fully regulated.
2.2.2 Power Supply
The power supply is a state-of-the-art, heavy duty and wide-range switch mode design, with
Power-Factor- Correction (PFC) built in. The start-up voltage is limited to assure maximum
protection. A second widerange and heavy duty switch mode power supply, with PFC, is used to
independently supply the controller card electronics along with the low voltage cooling fans and,
the stand-by ON/OFF system, via the KS Audio remote digital controller system.
2.2.3 Cooling
In the production of high audio output levels, large amounts of heat are also generated as a by-
product of the amplifier, which could damage the semi conductors. The reduction of these high
temperatures is done with the use of 3 independent, thermostatically controlled cooling fans. The
air is taken in from the front panel inlet of the power amplifier and passed through to the back
panel outlet while passing over the heat fins and power transformer to actively cool these units
down to nominal operating temperatures.
