Page 3
AIRSTREAM S150
1 Introduction
A
compact
Bluetooth
speaker
system
with
Bluetooth
only
functionality.
The
acoustic
system
is
based
around
a
3
amplifier
platform
driving
2
x
full
range
drivers
and
1
x
19mm
tweeter.
The
functionality
will
be
the
same
as
other
Airstream
products
and
incorporate
the
same
UI
features.
The
unit
will
be
mains
powered.
2 Electronic Specification Overview
2.1 PSU
The
outboard
PSU
adaptor
is
auto
‐
ranging
from
mains
input
of
94
‐
264Vac
(100
‐
240v
nominal
working
voltage
range)
and
with
a
minimum
output
of
17V/2300mA
(40W)
The
PSU
adaptor
style
will
be
designed
to
fit
onto
a
wall
socket
and
feature
replaceable
plug
pins
for;
U.S.A,
U.K,
EU;
2.2 Power Amp section
3
x
20W
@
6
Ω
for
drivers
Class
D
amplifiers
<1%
THD+N
(full
power)
2.3 Other
features
ARM
Cortex
M4
aptX
codec
for
Bluetooth
3 Control
3.1 Local
Controls
Localised
controls
should
include:
Volume
up/down
(side
mounted)
Power
on/standby
(front
mounted)
Auxiliary
input
button
(side
mounted)
Bluetooth
source
button
‐
using
BT
logo.
(side
mounted)
Bluetooth
pairing
button
(rear)
Localised
inputs
and
connections
should
include:
3.5mm
mini
‐
jack
(aux
input)
DC
input
by
coaxial
connector
USB
type
A
connector
for
generic
5v
charging
purposes
(Apple
charging?)
–
removed
Apple
authentication
chip.
