Takstar DA-251 User Manual

: www.takstar.com

:

: 516100

: : : [e-mail]

: : : [e-mail]

GUANGDONG TAKSTAR ELECTRONIC CO., LTD.

Website: www.takstar.com

Address: Longqiao Road, Longxi, Boluo, Huizhou Guangdong, 516100, China

International Sales Department

Tel: [phone] Fax: [phone] E-mail: [e-mail]

Domestic Sales Department

Tel: [phone] Fax: [phone] E-mail: [e-mail][phone] [phone]

Wireless Voice Amplifier

DA-251

User’s Manual

GUANGDONG TAKSTAR ELECTRONIC CO., LTD.

12 1

Wireless Amplifier

Frequency Range: 220-270MHz (enjoying more than 40 kinds of

frequency spot)

Sensitivity: -80dBM (S/N 30dB)

Mute Mode: Noise Locking

Resonance Interfere Rate: >50dB

False Image Interfere Rate: >50dB

Total Harmonic Distortion: < 1% (1kHz)

Output Power: about10W

S/N Ratio: >80dB

Frequency Response: 100Hz-12kHz

Input Signal: wired MICX1, wireless MICX1

Speaker: 4 /10W

Power: DC 12V or 10.8V (2Ah Ni-MH battery)

Effective Using Distance: 20m of radius overrun, 40m in the open

area;

Weight: 1.1kg

Transmitter:

Frequency Steadiness: ±0.005%

Harmonic Rejection: 40dBm

Current Consumption: about 25mA

Operating Voltage: DC 9V

Specification

2 11

VOICE AMPLIFIER

DA-251

POWER

VOLUME

ON/OFF

RF

TONE

CHARGE

VOL

OFF ON

POWER

MIC

SimpleI Method In Case Of Trouble

If there are any other troubles or problems observed, please do not open and repair it by

yourselves. Please, first contact our distributor or directly come back to us. We will try our

best to provide you with professional and efficient service.

Phenomena

The receiver is turned on, but the indicator

does not light

The “RF” indicator lights while speaking,

but no output signal is available

When the using distance gets shorter, the

signal becomes unsteady

Sound quality gets worse

Elements

The battery power is running off, please

recharge the inside battery in time.

1.Please turn on the power switch of

transmitter.

2.Please adjust the volume control of both

transmitter and amplifier to the proper

position.

1. Pull out the antenna and check if the

batteries are running off, replace them

with fresh ones or recharge them.

2.If the receiver is put in an inappropriate

position, ie. on the ground or at the

corner of the wall or in a strong

electromagnetic filed, please change its

position.

1.The battery of both amplifier and

transmitter is running off.

2.If there is same frequency signal

problem: do not use two machines with

same frequency at the same time in the
same area. (The distance must be at
least 80m between two machines with

same frequency)

MIC IN AUX IN OUTPUT DC 12V

10 3

1. The system can be powered either by DC 12V 1A or by the batteries

inside.

2. The distance must be 80m between the two voice amplifiers with the

same frequency in order to avoid interference.

3. When howling occurs during operating, please try adjust the system

according to the suggestions below:

A. Adjust the position or direction of the amplifier.

B. Enlarge the distance between the sound source of the

amplifier and transmitter.

C. Adjust the tone knob to the appropriate degree.

D. Adjust the volume control knob to reduce the volume.

4. If the sound of the system suddenly breaks out while operating, first

Please check the power indicator. If it is in red state or fade out, that

means the battery is running off. Please recharge it in time.

5. When the battery is running off, turning on the power switch will cause

the power indicator gets into the red state, which means it cannot be

turned on. Please recharge it in time.

6. When not using the system, please turn off the power of both the

transmitter and the amplifier to reduce the power consumption.

7. When not using the system for a long time, please fully charge the

batteries of the amplifier. The batteries should be recharged at least

every half a year for maintenance in good condition.

Cautions

4 9

DC 12V

1A

1. Please make sure the batteries inside the amplifier are charged
before use. Connect the jack of the power adaptor with DC Input
socket of the receiver, plug the AC connector of the power adaptor
into AC 220V/50Hz socket, then the batteries start being charged.
The charging indicator will flash in red while charging. The green light
indicates that the battery is fully charged.

2. Turn the knob right, the sound “di” indicates the receiver is power-on,
and the power indicator lights in blue. Adjusting the knob to the right
will increase the voice, and vice versa till it is turned off. When the
volume is getting lower, that means the battery is running off. Please
recharge it in time. It is possible to still use it while charging. When
not charged, the power indicator will turn red and the device will be
turned off automatically 15 second later due to its self-protecting
function for over discharging. So please turn off the device before it
blacks out.

3. When using the wireless transmitter, please pull the antenna of the
amplifier for the best result. The effective working distance is 20m.
Keep the 1m distance between the transmitter and the receiver to
avoid howling.

4. Before using, please adjust the appropriate distance between the
microphone and the sound source, as well as the volume and the
tone knob for getting best sound quality.

5. For more audio output, please just connect the external power
amplifier with the amplifier audio output socket “OUTPUT”.

6. For recording while teaching, please just use the cable to connect the
audio output socket of the amplifier with the Mic In Socket of the
recorder.

7. MIC IN: Plug the headset mic into the MIC Input socket. At this
moment the device is at the stand by state.

8. AUX IN: Audio Input Socket for connection with the sound source

by the 3.5mm jack for enjoying music indoors.

Detailed Operating Instruction

8 5

Charging Indicator

Tone Control

RF Indicator

Volume Control Knob with

Power Switch

Power Indicator

Amplifier Front Panel Functional Introduction

Amplifier Rear Panel Functional Introduction

MIC IN Socket

AUX IN Socket

OUTPUT Socket

DC Socket

Battery Compartment

Antenna

Wireless Microphone Transmitter Functional
Introduction

Power Switch

Power Indicator

Microphone Input Socket

Belt-clip

Battery Compartment

Volume Control Knob

VOL

OFF ON

POWER

MIC

VOICE AMPLIFIER

DA-251

POWER

VOLUME

ON/OFF

RF

TONE

CHARGE

MIC IN AUX IN OUTPUT DC 12V

6 7

TAKSTAR DA-251 wireless voice amplifier due to its simple but

light and modern design performs remarkably while teaching,

giving speeches and small-scale activities. It features high fidelity

tone quality, wide frequency response range with low level of

distortions, stable performance, low self-noise and economical

power consumption. The VHF system (220-270MHZ) has more

than 40 kinds of frequency spots to choose. Furthermore, the

system adopts the intelligent power supply and special low voltage

protection function. It is smart & smooth in shape and easy to carry

and operate, which makes it most suitable for such applications as

teaching and public addresses.

Voice Amplifier 1pc

Transmitter 1pc

12V/1A Power Adaptor 1pc

Headset Microphone 1pc

Tie-clip Microphone 1pc

9V Battery 1pc

Output Cable 1pc

User's Manual 1copy

Warranty Card 1copy

Products Introduction

Packing List