• 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
