Topp Music Gear TMA250-4 User manual

SEIKAKU TECHNICAL GROUP LIMITED
MAR.21.2011
A3 A4 A5
-RS
TMA250-4/500-4 TOPP PRO_V1.0 TMA250-4/500-4 0.032KG/1 NH00149 1:1
NPD-TO-1011005
TOPP PRO
4
PHFOA102-20091100017
8
NF03552

TMA250-4
TMA250-4/500-4
FOUR CHANNELS POWER AMPLIFIER
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
TMA500-4
TMA250-4
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 500-4
500W 4 Professional Amplifier
NF03552-1.0

TMA250-4
TMA500-4
11
TMA250-4
15
TMA500-4

TMA250-4
10. ...................................................................................................................GUARANTEE
9.TECHNICAL SPECIFICATIONS...........................................................................................
8.BLOCK DIAGRAM...........................................................................................................
7.CAUTION FOR APPLICATION............................................................................................
6.APPLICATION...................................................................................................................
5.INSTALLATION................................................................................................................
4.CONTROLELEMENTS ........................................................................................................................ .....
2.FEATURES...................................................................................................................... ................
1.INTRODUCTION ..........................................................................................................................................
13
12
11
10
8
7
5
4
4
.
.
.
3.USEFULL DATA...............................................................................................................4
TMA500-4
TMA250-4
11
14
TMA500-4
11.NOTES........................................................................................................................... 14

TMA 250-4
The TMA 250-4/500-4 Four Channels Power Amplifier is designed for professional use and provides unparalleled
quality. It Includes soft start, signal limit, two variable-speed-low-noise fans and a LED meter display. Each channel is
equipped with independent protective circuitry against open circuit, short circuit, mismatched loads and overheat.
It includes four independent channels with separate power supply. Furthermore, every channel has also a main
LED that becomes green for power-on indicator and green for muting or protection, another red LED that shows
true amplifier clipping and a yellow one for the limit stage. The high-quality components and the carefully designed
circuits ensure excellent audio performance and an extremely linear frequency response, giving crystal-clear sound
in the high range and an up-front, full-bodied bottom end. This amplifier guarantees total reliability and a trouble-
free use even in the most demanding conditions. We believe the TMA20-4/500-4 not only look great, but provide
a perfect performance, what you get is unprecedented performance at an incredibly attractive price.
Innovative design and high stability power amplifier
Fan-cooled AB class high power amplifier in 19", 2U size
4 independent channels with separate protection system
DC, infrasonic, overheat & short circuit protection
Smart-designed protection system for auto re-operation after fault
Parallel-input: channel 1 to channel 2, channel 3 to channel 4
Allow selection of Stereo, Bridge or parallel operation
Ultra low-noise and hum
High-pass filter , allow selection of flat, 35 Hz or 75Hz, protect speakers and prevent speaker transformer
saturation with minimal effect on program material.
DIP switch control for clip limit, high-pass filter, bridge-mono selections
AUTO variable- speed-low-noise fans ensure high reliability even under demanding conditions.
Detachable Euroblock: " Barrier strip" input connectors.
Rugged amplifier in a strong, compact chassis
TMA500-4
10
TMA250-4
13
TMA500-4

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
16
34 52
7
98
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

CONTROL ELEMENTS
4
TMA250-4
6
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10 11 12
4.2 The Rear Panel
10- INPUT Terminal
This unit is provided with balanced terminals, which are used to connect the input signal. Channel 1 and channel 3
are used in bridge and parallel mode.
11- Mode Selector
You can choose the right function and output you need via the mode selector switch. In order to make you acquire
these settings, now let me introduce the dip switch.
This switch is made up of 10 small dip switches, these small dip switches from1 to 5 control one channel, these
rest ones (6-10 ) control the other channel, ok, you can choose the right mode setting you need via these small
dip switches. Take the dip switch of channel 1 and channel 2 for example. Channel 3 and channel 4 are the same
as channel 1 and channel 2
13
14
STEREO MODE
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- Output Mode Selector
This unit provides three output modes: stereo, bridge and parallel. Here are some details:
turn these small dip switches of 4, 5, 6, 7 up to the top, then channel 1 and channel 2 are in stereoStereo mode:
mode;
Parallel mode: turn these small dip switches of 4, 5, 6, to the top, and turn the small dip switch of 7 down, then
channel 1 and channel 2 are in parallel mode.
Bridge mode: turn these small dip switch of 7 up to the top, then channel 1 and channel 2 are in bridge mode.
PARALLEL MODE
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BRIDGE MODE
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Please refer to chapter 5 for the connection of loads in detain.
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BREAKER
CH1 CH2
CH3 CH4
INPUTS
CH1 MODE SWITCHES CH2
CH3 MODE SWITCHES CH4
OUTPUTS
MODE SWITCH SETTINGS
FILTERS
35Hz FILTER
FILTEROFF
FILTEROFF
35Hz FILTER
FILTERON
75Hz FILTER
75Hz FILTER
FILTERON
14567 10
CLIP LIMIT
STEREO MODE
ON
OFF
ON
OFF
23456789
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SWITCH SETTINGS
TO BRIDGE CHANNELPAIRS SET INPUT SWITCHES AS
SHOWN. USE THE LOWER NUMBERED CHANNEL'S INPUT
AND GAIN CONTROL. CONNECT SPEAKERAS SHOWN.
CH1AND CH2
CH3AND CH4
BRIDGEABLE
CHANNEL PAIRS: 12345678910
BRIDGE MONO
CH3
CH4
BRIDGE
MONO
BRIDGE
MONO
CH1
CH2
OUTPUTS
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PARALLEL MODE
MADE IN CHINA
110-120V 50/60Hz
220-240V 50/60Hz
TMA 250-4
110-120V~11A
220-240V~6A
RATED POWER
CONSUMPTION 2200W
AC INPUT
S/N
TMA500-4
BLOCK DIAGRAM 8
TMA250-4
11
TMA500-4

CONTROL ELEMENTS
TMA250-4
4
7
12- Output Terminal
You can output the powered signal by the specific output connectors according to the actual application circumstance.
Caution: turn off the unit before connecting the output connectors so as to avoid any electric shock!
13- Breaker
This switch works as fuse for protecting the unit from damage. When the unit is overloaded or the temperature
inside the unit is too high, this push-button will spring up and break the power supply. The power supply will be
restored with pushing this switch again.
14- AC-Inlet
This standard IEC receptacle is supplied to allow to connect your TMA 250-4/500-4 to mains via the supplied power cord.
- function selector
Clip limit : set these small dip switches of 1(ON) and 10(ON) at "ON" position , then the clip limit of channel 1
and channel 2 has been working; once the output level is reach or exceed the level that is predetermined by the
threshold setting selected, it may result in the undesirable distortion .in order to avoid the distortion, the clip begins;
if the dip switch are set at "OFF", the clip limit doesn't work.
CLIP LIMIT
ON
OFF
ON
OFF
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Filter: this unit are equipped with two low cut filter eliminating unwanted low- frequency signals like rumble noise:
75Hz and 35Hz. You will activate 35Hz low cut filter by Turning these two small dip switches of 2 and 9 up to the
top, and turn these two small dip switches down, you will choose 75Hz low cut filter.
35Hz FILTER
FILTER OFF
FILTER OFF
35Hz FILTER
FILTER ON
75Hz FILTER
75Hz FILTER
FILTER ON
14567 10
TMA500-4
CAUTION FOR APPLICATION
7
TMA250-4
10
As to the speaker cable, if you use a long one, use as thick a cable as possible to prevent deterioration of the
damping factor or power loss inside the cable.
Use the following formula to determine the fuse capacity according to the speaker's input capacity.
Po=I R I= Po/R
2
Po[W] : Speaker's continuous input capacity (noise or RMS)
R[ ] : Speaker's nominal impedance
I[A] : Required fuse capacity
7.1 General Application instruction
the following instructions describe the common ways to install your TMA 250-4/500-4 power amplifier into a sound
application system:
First, turn off power switch before connection.
Refer to chapter 5 for speaker connection
TMA 250-4/500-4 power amplifier may be operated in one of the three modes, please slide the mode selector
for the Specific operating mode
7.2 caution for speak connection
The output capacity of TMA 250-4/500-4 power amplifier is very high, be sure to use a speaker system that has sufficient
input capacity. If the input capacity of your speaker system is lower than the rated output of the TMA 250-4/
500-4 power amplifier, you can protect your speakers by connecting a fuse serially between the speaker and the
amplifier as shown below.
Output
Fuse
(+)
(-) -
+
Speaker
System
TMA500-4
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BREAKER
CH1 CH2
CH3 CH4
INPUTS
CH1 MODE SWITCHES CH2
CH3 MODE SWITCHES CH4
OUTPUTS
MODE SWITCH SETTINGS
FILTERS
35Hz FILTER
FILTEROFF
FILTEROFF
35Hz FILTER
FILTERON
75Hz FILTER
75Hz FILTER
FILTERON
14567 10
CLIP LIMIT
STEREO MODE
ON
OFF
ON
OFF
23456789
12345678910
SWITCH SETTINGS
TO BRIDGE CHANNELPAIRS SET INPUT SWITCHES AS
SHOWN. USE THE LOWER NUMBERED CHANNEL'S INPUT
AND GAIN CONTROL. CONNECT SPEAKERAS SHOWN.
CH1AND CH2
CH3AND CH4
BRIDGEABLE
CHANNEL PAIRS: 12345678910
BRIDGE MONO
CH3
CH4
BRIDGE
MONO
BRIDGE
MONO
CH1
CH2
OUTPUTS
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PARALLEL MODE
MADE IN CHINA
110-120V 50/60Hz
220-240V 50/60Hz
TMA 250-4
110-120V~11A
220-240V~6A
RATED POWER
CONSUMPTION 2200W
AC INPUT
S/N

TMA250-4
5
8
5.2 Rack Mounting
the most secure mounting is on a universal rack shelf available from various rack manufactures or your music dealer.
The TMA 250-4/500-4 professional power amplifier fits into one standard 19" rack unit of space. Be sure that there is
air space around the unit for sufficient ventilation. If heat release is inadequate, this unit will retain heat inside,
may cause the protection, or even a fire.
enough
which
Application
The TMA 250-4/500-4 provides three operating modes with each unit: stereo mode, parallel mode and bridged
mode, you can decide each specific operating mode according to your actual application circumstance. Following
examples will show you the typical connections, you can refer to install your TMA 250-4/500-4 into a sound system:
7.1 Operate TMA 250-4/500-4 Power Amplifier In Stereo Mode
In this mode, channel 1 and channel 2 operate independently ( as a conventional stereo amp).The channel 1 input
signal will be output from the channel 1 output jacks, and the channel 2 input signal will be output form the channel 2
output jacks.(take channel 1 and channel 2 for example)
+
Channel 1
+
Channel 2 +
STEREO MODE
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Channel 2
Channel 1
Installation
5.1 Mains connection
Do not insert the power cord into this unit until voltage has been correctly set. Do not plug the power cord into the
mains until the voltage has been correctly set. Please ensure that the TMA 205-4/500-4 professional power amplifi
supplied with the correct voltage before turning on this unit. If you can't power up this unit while turning on the
switch (1), check the Breaker (14) on the rear panel fist, maybe it is pressed to reset. Otherwise, contact
technician or qualified personnel for any service.
ris
mains the
Caution: To reduce the risk of electric shock, do not perform any servicing other than contained in this manual unless
you are qualified to do so. Please turn off this unit before any installation and connection, esp. when you connect your
unit into the sound system. This is important to prevent damage to the unit itself as well as other consequent speaker
system. This is important to prevent damage to the unit itself as well as other consequent speaker system The mains
connection of the TMA 250-4/500-4 professional power amplifier is made by using the enclosed power cord a
standard IEC receptacle, and it meets all of the international safety certification requirement.
and
6
TMA500-4
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BREAKER
CH1 CH2
CH3 CH4
INPUTS
CH1 MODE SWITCHES CH2
CH3 MODE SWITCHES CH4
OUTPUTS
MODE SWITCH SETTINGS
FILTERS
35Hz FILTER
FILTEROFF
FILTEROFF
35Hz FILTER
FILTERON
75Hz FILTER
75Hz FILTER
FILTERON
14567 10
CLIP LIMIT
STEREO MODE
ON
OFF
ON
OFF
23456789
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SWITCH SETTINGS
TO BRIDGE CHANNELPAIRS SET INPUT SWITCHES AS
SHOWN. USE THE LOWER NUMBERED CHANNEL'S INPUT
AND GAIN CONTROL. CONNECT SPEAKERAS SHOWN.
CH1AND CH2
CH3AND CH4
BRIDGEABLE
CHANNEL PAIRS: 12345678910
BRIDGE MONO
CH3
CH4
BRIDGE
MONO
BRIDGE
MONO
CH1
CH2
OUTPUTS
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PARALLEL MODE
MADE IN CHINA
110-120V 50/60Hz
220-240V 50/60Hz
TMA 250-4
110-120V~11A
220-240V~6A
RATED POWER
CONSUMPTION 2200W
AC INPUT
S/N
TMA250-4
APPLICATION 6
9
6.2 Operate TMA 250-4/500-4 Power Amplifier In Parallel Mode
In this mode, the channel 1 input signal will be output from the output connectors of both channel 1 and channel
2. The channel 2 input jack is not used. The channel 1 and channel 2 volumes can be adjusted independently.
6.3 Operate TMA 250-4/500-4 In Bridge Mode
In this mode, the channel 1 input signal will be output from the bridge output connectors. In this case, use the channel 1
volume control to adjust the volume. keep the volume control of channel 2 turned completely down (counterclockwise).
Then, you can control the volume of the whole system by adjusting the channel 1 volume control.
+
Channel 1
+
Channel 2 +
PARALLEL MODE
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Channel 1
BRIDGE MODE
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+
Channel 1
TMA500-4
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BREAKER
CH1 CH2
CH3 CH4
INPUTS
CH1 MODE SWITCHES CH2
CH3MODESWITCHESCH4
OUTPUTS
MODE SWITCH SETTINGS
FILTERS
35Hz FILTER
FILTEROFF
FILTEROFF
35Hz FILTER
FILTERON
75Hz FILTER
75Hz FILTER
FILTERON
14567 10
CLIP LIMIT
STEREO MODE
ON
OFF
ON
OFF
23456789
12345678910
SWITCH SETTINGS
TO BRIDGE CHANNELPAIRS SET INPUT SWITCHES AS
SHOWN. USE THE LOWER NUMBERED CHANNEL'S INPUT
AND GAIN CONTROL. CONNECT SPEAKERAS SHOWN.
CH1AND CH2
CH3AND CH4
BRIDGEABLE
CHANNEL PAIRS: 12345678910
BRIDGE MONO
CH3
CH4
BRIDGE
MONO
BRIDGE
MONO
CH1
CH2
OUTPUTS
12345678910
PARALLEL MODE
MADE IN CHINA
110-120V 50/60Hz
220-240V 50/60Hz
TMA 250-4
110-120V~11A
220-240V~6A
RATED POWER
CONSUMPTION 2200W
AC INPUT
S/N
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BREAKER
CH1 CH2
CH3 CH4
INPUTS
CH1 MODE SWITCHES CH2
CH3MODESWITCHESCH4
OUTPUTS
MODE SWITCH SETTINGS
FILTERS
35Hz FILTER
FILTEROFF
FILTEROFF
35Hz FILTER
FILTERON
75Hz FILTER
75Hz FILTER
FILTERON
14567 10
CLIP LIMIT
STEREO MODE
ON
OFF
ON
OFF
23456789
12345678910
SWITCH SETTINGS
TO BRIDGE CHANNELPAIRS SET INPUT SWITCHES AS
SHOWN. USE THE LOWER NUMBERED CHANNEL'S INPUT
AND GAIN CONTROL. CONNECT SPEAKERAS SHOWN.
CH1AND CH2
CH3AND CH4
BRIDGEABLE
CHANNEL PAIRS: 12345678910
BRIDGE MONO
CH3
CH4
BRIDGE
MONO
BRIDGE
MONO
CH1
CH2
OUTPUTS
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PARALLEL MODE
MADE IN CHINA
110-120V 50/60Hz
220-240V 50/60Hz
TMA 250-4
110-120V~11A
220-240V~6A
RATED POWER
CONSUMPTION 2200W
AC INPUT
S/N