Ahuja BTA-550 User manual

tPlease read this manual thoroughly before making connections and
turning on the power. Following the instructions in this manual will
enable you to obtain optimum performance from your new AHUJA
Portable PA Amplifier.
tPlease retain this manual for future reference.
tThank you for purchasing AHUJA Portable PA Amplifier BTA-550.
30W Max.
Portable PA Amplifier

2
BTA-550
• Safety Instructions• Safety Instructions
lWhen the set is not in use, keep the power switch OFF.
lTo charge the built-in battery, connect the 240V AC mains, but keep POWER
switch on the rear panel to OFF. Charge immediately after purchasing the set,
and also periodically thereafter (even if set is not used on built-in battery)
Important
This symbol, wherever it appears, alerts you to the presence of uninsulated
hazardous voltage that may be sufficient to constitute a risk of electric shock.
External wiring to any terminal marked with this symbol must be done by a trained
and instructed person only.
Power Source: The voltage & frequency of the AC mains supply, to which this set can be
connected, is marked on the rear panel of the set. Do not connect this set to any power
source other than those specified on the rear panel.
This symbol, wherever it appears adjacent to a component, alerts you that the
concerned component can only be replaced by another of the exact same
specifications.
WARNING
Read the Instructions: Please read all the instructions in this section carefully before
installation or use of the product. All the safety instructions must be followed.
Retain the Instructions: Please retain this Instruction Manual for future reference.
CAUTIONS
Cleaning: Disconnect this equipment from the AC mains before cleaning.
Operation on Generator: When operating this set on a generator, make sure the set is
switched off till the generator voltage has stabilized.
nBefore replacing any fuse, make sure the set is switched off and disconnected from
the AC mains or any other power source. Replace a fuse only with another of exactly
same specification.
Water & Moisture: To reduce the risk of fire or electrical shock, do not expose this
product to rain or moisture. Do not use this product near water or in a wet location. Do not
keep any object filled with liquid, such as a vase, on top of this set. Do not insert or remove
the AC mains plug with wet hands.
Stability: This set must be kept in a stable and flat horizontal position, and never in a
tilted position. Do not place this set on an unstable stand, tripod, bracket or mount. Do not
use attachments which are not supplied or explicitly recommended by the manufacturer.
nTo reduce the risk of electric shock, do not open the product. No user serviceable parts
inside. Refer all servicing to qualified personnel only.
Power Cord Protection: Do not cut, kink, damage or modify the AC power cord supplied
with this set. Keep the AC power cord away from heaters and harmful chemicals. Do not
keep any heavy object on the power cord.

• Features
nBuilt-in 20.32 cm (8") 30W Full Range Dual Cone speaker & a tweeter.
nBuilt-in Digital Echo.
nElegant and compact Portable PA Amplifier in moulded cabinet with trolley
system.
nTwo Mic inputs, One Wireless Mic & One Aux (Guitar) input.
nMic-1 and Wireless Mic have selectable priority over all other inputs.
nActive Bass & Treble controls.
nLED indications for low battery, charging & clip output.
nFacility of auto cut-off to prevent battery from deep discharge.
nThree power source operation (AC mains, External 12V DC or built-in 11.1V
2.2Ah rechargeable Li-ion battery).
nBuilt-in MP3 Player with Bluetooth, Recorder and remote control.
• Table of Contents
Remote Control Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Operation & Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Contents Page No.
Rear Panel Controls & Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Guideline for fixing mic holder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Wireless Microphone . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Guideline for using Bluetooth, TWS and Sing Along. . . . . . . . . . . . . . . . . . . . . . . . 7
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3
BTA-550

• Rear Panel Controls & Description
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BTA-550
i. PLAY: Press to play the track
Press again to pause when a
track is being played.
h. MODE: Press this button to
switch between Bluetooth,
USB, and SD modes. 6. ECHO: To adjust the level of delay
and Echo in the programme.
f. VOL+: Short press to select
next track. Long press to
increase the volume level.
j. VOL-: Short press this
switch to select prev track. Long
press to decrease the volume
level.
3. Bass Control: To increase or
decrease the level of low
frequency content in music.
g. IR Sensor: To operate the
remote functions, point the
remote control towards the IR
Sensor.
2. Treble Control: To increase or
decrease the level of high
frequency content in the music.
5. MIC-1 Volume Control: Used for
adjusting signal level of MIC-1
input.
4. MIC-2/AUX Volume Control:
Used for adjusting signal level of
MIC-2/AUX input.
8. RF LED: This RED LED glows
when the wireless transmitter is
switched ON.
9. MIC-2/AUX Guitar Input Jack:
Used for a Mic/Aux input or a guitar
input.
7. Wireless Mic Control: To adjust
the level of wireless MIC when RF
LED is glowing.
a. USB Connector:
Insert the USB drive here.
c. REC: Press once to start
recording. Short press to
Pause recording and
short press again to
resume recording. Long
p r e s s t o p l a y b a c k
recorded file.
d. TWS/Sing Along: Short
press to enable the TWS
mode for the amplifier
set. Long press when
p l a y i n g t h r o u g h
Bluetooth mode will
ena ble ‘Sing Along’
function.
e. Display: Will display the
volume level, track being
played & other functions.
1. MP3 Playback Facility
b. M M C / T F C a r d
Connector: Insert the
MMC/TF Card here.
BTA-550
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TWS /TWS /
MIC -2
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15. MIC-2/AUX Selector switch: Press
the switch to change from MIC-2 to
AUX input source.
12. DC Input Socket: For connecting
external 12V Car Battery.
16. Line Output: Provides a line level
mixed output signal of all inputs.
17. ON LED: When set is ON, this LED
will glow GREEN. When set is
working on built-in battery, the glow
of the LED is GREEN indicating the
battery is fully charged. When the
built-in battery voltage is below the
specified level, the glow of LED will
change to RED giving indication of
“Low Battery”. After few minutes it will
switch OFF completely.
19. CLIP LED: This RED LED glows
when the output is nearing the
clipping level. The glow of the LED
alerts the user that the signal level is
close to clipping level. User may
adjust controls accordingly.
20. Ext Speaker: 6.3mm (1/4”) mono
jack socket is provided to connect an
external speaker. Internal speaker is
disconnected when a mono plug is
inserted.
22. Master Control: This control adjusts
the level of mixed signal of all inputs.
18. CHARGE: Indicates the charging
status of the battery. During
charging, the glow of LED is AMBER.
When battery is fully charged, the
glow of this LED changes to GREEN
colour.
23. Antenna: For Wireless Mic, extend
the antenna for best performance
while in use.
21. USB Control: To adjust the signal
level of the MP3 player input.
13. Power Switch: Press upper part of
the knob to switch ON & lower part of
the knob to switch OFF the set.
Charging of built-in rechargeable
battery is done at OFF position of
the power switch.
10. MIC-1 Input Jack: Used for
connecting a wired mic.
11. Priority Switch: Pressing this switch
will give priority to MIC1 and wireless
mic over all other inputs.
14. Mains Socket with 1 Amp Fuse: AC
socket for connecting the detachable
AC lead, as supplied along with. This
has a built-in AC fuse of T1AL rating.
• Rear Panel Controls & Description
• How to Fix Mic Holder
BTA-550
5

• Remote Control Features
2. REC: Press REC button when
USB/SD Card is connected, then
module will start recording in USB/SD
Card. During recording short press
the REC button, it will Pause the
recording. Press again to resume the
recording. Long press of REC button
or short press of Play button during
recording will immediately start
playing the latest recorded file.
3. Mode: Press this button to switch
between Bluetooth, USB, and SD
modes.
5. VOL- : To decrease volume level of
MP3 player.
1. Cycle Mode: Repetitive pressing
of this button provides various
options like REPEAT ONE, REPEAT
FOLDER, RANDOM, and REPEAT
ALL.
NOTE: REC Function is available for
MIC-1, MIC-2 / AUX and wireless mic
only. When using a blank USB drive,
long press REC button to access the
recording folder and playback
recorded file.
4. Prev: During playback short
pressing the Prev. key will go to the
prev. file/track. Long press will fast
backward the track. In main menu,
short pressing previous key will go to
the previous option.
6. VOL+ : To increase volume level of
MP3 player.
7. Battery Replacement: Pull out the
battery tray and replace the battery
with positive electrode facing
upwards as shown in fig. below. Push
the battery compartment back to the
close position. Use CR2025 or
equivalent lithium coin cell.
8. Number key 0 to 9. To choose the
track number to be played.
9. PLAY/PAUSE: Press PLAY/
PAUSE once to pause if music is
already playing. Press PLAY/PAUSE
again to resume playing. During
r e c o r d i n g , s h o r t p r e s s o f
PLAY/PAUSE will immediately start
playing the recently recorded file.
10. MUTE: Press once to mute the
audio, press again to resume the
audio.
11. Power: Press once to switch off MP3
player, press again to switch ON.
12. Next: During playback, short
press the Next key to go to the next
file or track and long press to fast
forward the track. In main menu,
short press Next key to go to the next
option in the main menu.
13. Folder: Press the FOLDER key to
switch between folders stored in USB
or TF card. Long press FOLDER key
to playback recorded file if any.
NOTE: This key function will be
operational only when more than one
folder has been stored in the USB or
TF card.
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BTA-550
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REC FOLDER
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VOL- VOL+
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USB-4R
Pull Battery
Tray
Push to Lock

• Operation & Interconnections
+ Amplifier can be used on AC mains or
battery as desired by user.
+Set the Bass/Treble controls to the
desired level.
+Plug in the AC power cord to the nearest
AC mains socket and charge the built-in
battery before use. To charge the Built-
in battery, keep the Power switch of the
unit at OFF position & 240V mains
connected. For full charging of 2.2Ah
battery, it can take up to 4 hours.
+Set the desired level of Input controls for
optimum listening level.
+Keep Volume controls zero and Switch
ON the power switch to use the
Amplifier.
7
+Continuous glow of the CLIP LED
indicates that signal level is excessive.
Set the Input controls such that the clip
LED does not glow continuously.
Occasional glowing of CLIP LED is
normal during operation.
When the set is not in use put the power
switch to OFF position. This will prevent
unnecessary current consumption of the
internal battery.
+In case of AC mains failure, the power
backup will automatically change over
to an external 12V battery (if connected)
or to 11.1V internal rechargeable
battery.
BLUETOOTH
+Switch ON the BTA-550. The MP3
module display shows “On”
+ In TWS setup, Sing Along can be
activated by long press of TWS button
in the MASTER unit.
+ After a search, a new device by name
“AHUJA” appears on the Mobile phone
screen.
+ When pairing is completed, the displays
show “-bt-”. Select the track to played
and set the volume level of mobile &
Amplifier to desired levels.
+After few seconds, TWS function is
activated which is confirmed by the
display ‘-bt1’ in MASTER unit and ‘-bt2’
in SLAVE unit.
+In this feature only the vocals are
attenuated so that the user can sing
along with the original music
+ Press MODE switch of amplifier
module to select bluetooth option. MP3
module display show the word “bt”.
+Perform BT paring with this MASTER
unit.
+When music is played through the
paired source device then both units of
BTA-550 can be placed on left and
right side for true wireless playback of
the music.
+Two nos of BTA-550 can be used for
True Wireless Stereo function.
+Short press TWS button of MASTER
unit and ‘t-SC’ is displayed on the
screen.
+Now power ON the second unit of
BTA-550, which becomes SLAVE unit
and select BT Mode.
SING ALONG
+ Select the bluetooth option in Mobile
phone & follow the instruction as
appearing on Mobile phone for paring
the new device.
TWS
Note: The level of attenuation will vary
according to the music/vocal contents
of the track being played.
+ Select the new device “AHUJA” and
confirm for pairing.
+Power ON only one unit of BTA-550 to
make it as MASTER unit.
+To activate Sing Along in BTA-550,
long press TWS button and ‘ON’ is
displayed on the screen. To deactivate,
long press TWS button and ‘OFF’ in
displayed on the screen.
• Guideline for using Bluetooth, TWS and Sing Along
BTA-550

E. & O. E. 0K/00/23
Design and Specifications are subject to change without notice owing to continuous product up-gradation. Technical specifications are subject to
production tolerances. We cannot be held responsible for printing errors, should they occur. is a registered trademark of Ahuja Radios in India
and other countries. © Copyright Ahuja Radios, 2023. All rights reserved. Any unauthorized reproduction or use of logos, images or design elements is
strictly prohibited by law. No part of this compilation may be reproduced in any manner or translated without written permission.
AHUJA RADIOS
215, Okhla Industrial Estate, New Delhi-110020, INDIA l C-45, Phase-II, Noida-201305 (UP) INDIA
Tel.: [phone] Fax: [phone]
E-mail: [email protected] Website: www.ahujaradios.com
AC Power Consumption 50VA
Input Channels 2 x Mic 4mV/4.7kW, 1 x Aux 100mV/47kW,
1 x Wireless MIC
Speakers 1 x 8" (20.3cm) Full Range Dual Cone Speaker &
1 x 1.85" (4.7cm) Tweeter
Frequency Response 55-18,000Hz ±3dB
Power Output (Full range) 30W Max.
Receiver BTA-550
Tone Controls Bass ±5dB at 100Hz, Treble ±5dB at 10kHz
Digital Player MP3 player with USB, MMC/TF card reader,
Recording function and Bluetooth.
S/N Ratio >60dB
Line Output 775mV
Protections AC Fuse: 1 Amp. 250V (T 1A L)
Power Supply AC : 220V-240V 50/60Hz
DC : 12V Car Battery (external),
11.1V 2.2Ah Rechargeable Li-ion battery (built-in)
Weight 5.60kg Approx.
Dimensions W550 x H330 x D210 mm
• Specifications
Transmitter Handheld Transmitter
Frequency Response 50-15,000Hz
Indication Red LED for indicating microphone is ON
Weight 180g (w/o battery) Approx.
Power Supply 3V (2 × 1.5V AA Pencil Cells)
RF Output Power 15mW (Max.)
Controls POWER ON/OFF switch
Dimensions Ø55 (L 248) mm
Current Consumption 110mA at 3V DC