CONTROL ELEMENTS
TMA250-4
4
5
1- Power Switch
It switches on / off TMA 250-4 or TMA-500-4 main power.
2- Power LED
This LED lights up when the amplifier is powered on
3- Input Level Indicator Display
There are three high accurate LED indicators, which shows the level of the input signal. When the respective
channel's output signal distortion exceeds 0.5%, the red LED (clip) indicator lights up. it will warn you that the
level of the input signal is too high and may cause distortion, please attenuate the level of the input signal.
4- Protection LED
This green LED indicator lights up when the amplifier is powered ON, indicating that the soft-start protection
system is working. No sound is output during soft-start up. if one of the protection systems is activated during
normal use, this indicator lights up and no sound is output. The speakers system is actually disconnected from
the amplifier outputs when this indicator lights up. The protection systems are activated when overheating
occurs or a DC voltage is corrected, the protection systems deactivate automatically, this indicator goes out,
and normal amplifier operation is resumed.
5- Output Limiter LED
Set the clip limit switch at "ON" position, the yellow LED lights up when the unit is limiting the output signal.
6- Level Control
This pot provides smooth level changes control.
7- Fan
The unit is equipped with two fans, which can accelerate the flow of air to lower the temperature inside unit.
The inside temperature determines the fan speed, which controls the inside air flowing speed.
8- Bridge Mode LED Indicator
When you operate the unit in bridge mode, the LED indicator lights up .
9- Parallel Mode LED Indicator
When you operate the unit power amplifier in parallel mode, the LED indicator lights up
1
6
3 4
5
2
7
9 8
4.1 The Front Panel
TMA500-4
CLIP
LIMIT
OP.
(dB)
12
16
18
20
22
24
26
28
30
6
CH1
POWER
ON
OFF
PWR ON
(dB)
12
16
18
20
22
24
26
28
30
6
CH2
(dB)
12
16
18
20
22
24
26
28
30
6
CH3
(dB)
12
16
18
20
22
24
26
28
30
6
CH4
CLIP
-10dB
-20dB
-10dB
-20dB
LEVEL
PAR
LEVEL
CLIP
LIMIT
OP.
BRDG
CLIP
-10dB
-20dB
-10dB
-20dB
LEVEL
PAR
LEVEL
BRDG
TMA 250-4
250W
4 Professional Amplifier
TECHNICAL SPECIFICATION
TMA250-4
9
12
Output Power
20Hz 20kHz @0.1%THD , stereo Mode
8 ohms per channel
4 ohms per channel
Bridge Mono Mode
8 ohms, 1kHz, 0.1% THD
Distortion (SMPTE-IM)
Frequency Response
Damping Factor, 1kHz, 0.1%THD(EIAJ)
Signal to Noise, 20Hz-20kHz
Voltage Gain
Input sensitivity @ 4 ohms
Input clipping
Input impedance
Controls
Indicators
TMA 250-4
Model
<0.05%
20Hz- 20kHz 1dB, -3dB point: 10Hz- 60kHz
>300@8 ohms
90dB
40 ( 32dB)
1Vrms
10 Vrms (+22dB)
10Kohms unbalanced, 20 Kohms balanced
Front: AC Switch, Ch1 - Ch4 Gain Knobs
Rear: MODE SWITCHS
Power - On: Blue LED
Protection: Green LED
LIMITER : Yellow LED
Clip: Red LED
Parallel-input: Yellow LED
Bridge: Yellow LED
Level: Green LED (-20 and -10dB)
Connectors, each channel
Input: Terminal Block
Output: Screw-terminal Barrier Block
Power supply
cooling
Load protection
Dimensions
Net weight
Continuously variable- speed fan, front - to - rear air flow
On / Off muting, overheat & short circuit protection
220-240 ( 110-120) Vac 50-60 Hz
19" ( 48.3 cm) rack mounting, 3.5" ( 8.9 cm) tall ( 2 rack spaces),
15.9" ( 40.3 cm) deep ( rack mounting to rear support ears)
17Kg
250W 4(EIAJ)
220W 4(RMS)
500W 2(EIAJ)
420W 2(RMS)
145W 4(RMS)
180W 4(EIAJ)
TMA500-4
TMA 500-4
500W 4(EIAJ)
400W 4(RMS)
1000W 2(EIAJ)
780W 2(RMS)
260W 4(RMS)
300W 4(EIAJ)
19Kg
100dB
Содержание TMA250-4
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