Audiosmile Little British Monitor User manual

Little British Monitor
User Guide
Feb 2016

Thank you for purchasing a pair of Little British Monitors from AudioSmile.
Description
The LBM is a hand-made high performance active desktop loudspeaker with
Bluetooth aptX reception.
Matching desktop stands called Little Feet are provided with the LBM that
isolate loudspeaker vibration from the support surface for clearer sound.
Specifications
Care
The LBM cabinet is made of Birch plywood. It is finished either with a vinyl
wood effect cover or real wood veneer with an acrylic lacquer. Both types can
be cleaned with a slightly damped micro-fibre cloth. Do not use spirit based
cleaners.
Master / Slave
The master speaker is the left audio channel, the slave speaker is the right
audio channel. The slave speaker is linked to the master speaker by the
provided 4-pin cable for stereo operation.
Power Supply
Input 100V
–240V (universal)
Output 30V x 3A = 90 Watts
Cabinet
Dimensions
180mm x 120mm x 120mm HWD
Weight
Master 1.4Kg
/ Slave 1.2Kg
Frequency Range
58Hz
–23,000Hz
Amplification
2x 25 watts Low
Frequency Class A/B
2x 20 watts High
Frequency Class A/B
Crossover
Active,
1500Hz 4th Order Acoustical
Bluetooth
CSR8645 Chipset, aptX Support
Inputs
1x 3.5mm Jack, 1x Internal Bluetooth

Controls and Connection
The power adaptor should be connected to the socket labelled ‘DC 30V’. It is a
press-fit connection. Only use the supplied adaptor.
The LBM power is controlled by the toggle switch labelled ‘On / Off’.
The LED is a power indicator.
The slave speaker should be linked to the master speaker by the socket labelled
‘Save Speaker’ using the supplied cable. This is a press-fit connection with a screw
locking ring. The master speaker can be operated without the slave speaker
connected.
The boundary adjust switch provides a -2.5dB bass reduction to compensate for
the speaker being placed next to a large reflective surface. Simply choose the
setting you prefer.
The input switch is positioned down to select the internal Bluetooth receiver and
up to select the aux input.
The aux input is a 3.5mm stereo jack socket for connection to external devices. Tip:
connecting the LBM to mains grounded equipment can reduce susceptibility to
hum.

Grilles
The LBM grilles are made of reticulated open cell foam which has greater
acoustic transparency than fabrics. The choice to use grilles should be a purely
aesthetic one.
The foam is attached to a thick card frame to maintain shape. The frame is
affixed to the loudspeaker front by a small piece of blu-tack at each corner.
To remove the grille, place a thin blade such as a ruler between the edge of the
loudspeaker and the grille, then lever it out. Ensure that you lever the card
frame of the grille not the foam which is delicate.
Any remnants of blu-tack on the loudspeaker can be removed by dabbing a
larger piece of blu-tack against it until all pieces have been collected.

Power Adaptor
The LBM power adaptor is a ‘universal’ device that can operate with an input
voltage range between 100 Volts -240 Volts.
Only the supplied power adaptor should be used with the LBM. Due to the
specific circuit design of the LBM, the output of the power adaptor must be
electrically floating. Other adaptors may not work correctly and could damage
the LBM.
The adaptor is supplied with a UK IEC cable. To use the LBM in other countries
an IEC cable with a suitable mains plug must be sourced.
Bass Ports
Each LBM has a low frequency port located on the bottom of the cabinet. This
should be raised >6mm from the support surface to allow the full range of
sound to be heard.
Little Feet Stands
The Little Feet feature an opening in the support plate allowing the bass port of
the LBM to work freely.
The support plate is constructed from two layers of stainless steel constraining
a layer of acrylic adhesive. This construction damps vibrations originating from
the loudspeaker. The damping plate is de-couple the Little Feet frame by
neoprene isolators.

Bluetooth Operation
When the LBM is powered on, the Bluetooth system will enter pairing mode. It
will be seen by source devices as ‘LBM’. If the input switch is set to ‘BT’ a voice
will report ‘Power on, Pairing’.
If a previously paired source device is within range it will connect
automatically when the LBM is powered on.
Upon pairing with a source device the LBM will optimize transmission settings.
This takes a period of approximately 20 seconds during which audio playback
may be interrupted.
Momentary interruptions may occur if the signal strength changes during
playback while the LBM adjusts settings to maintain streaming. This can occur
if the source device is moved or there is signal interference such as nearby Wi-
Fi networks.
When the LBM has been powered on for an extended period of time without a
paired Bluetooth device, the Bluetooth system will power off to conserve
energy. If the input switch is set to ‘BT’ a voice will report ‘Power Off’. This is
the Bluetooth system only, not the LBM which remains on and the Aux input
may be used. To wake the Bluetooth section the LBM should be powered off
for 10 seconds and powered on.
Pairing Procedure - Android
Pull down the system menu from the top
of the screen.
Select the Bluetooth menu by touching
the ‘Bluetooth’ writing, not the icon.

Switch on Bluetooth.
Power on the LBM, input switch set to ‘BT’.
Select ‘More Settings’.
The device will search for all nearby
devices.
Select ‘LBM’ to pair. All sound will now be
routed to the LBM.

Change Paired Device –Android
The LBM should be powered off for a minimum of 10 seconds to fully discharge.
The source device must have Bluetooth turned off, be set to ‘forget’ the LBM,
or be out of range.
Power on the LBM. When no previously paired source device is available the
LBM will automatically enter pairing mode and can be discovered by new
devices.
Pairing Procedure –iOS
Select ‘Settings’.
Select the ‘settings’ icon. Select ‘Forget’.

Select ‘Bluetooth’.
Turn on Bluetooth.
Power on the LBM, input switch set to ‘BT’.
The device will search for all nearby devices.
Select ‘LBM’ to pair. All sound will now be
routed to the LBM.

Change Paired Device –Android
The LBM should be powered off for a minimum of 10 seconds to fully discharge.
The source device must have Bluetooth turned off, be set to ‘forget’ the LBM,
or be out of range.
Power on the LBM. When no previously paired source device is available the
LBM will automatically enter pairing mode and can be discovered by new
devices.
Select ‘I’. Select ‘Forget This Device’.
Select ‘Forget Device’.

Glossary
Active –This means power amplifiers are built into the loudspeaker,
one per driver, for ultimate quality.
Bluetooth aptX–aptX is a transmission codec developed by CSR for
streaming lossless audio content over Bluetooth. Source devices must
also support aptX to enable this feature and a list of such devices can
be found on the CSR website.
Damp –Absorption of energy, usually by conversion to heat.
Crossover –The point at which the audio signal is split between one
transducer and another.
Blu-tack –A gum like substance produced by Bostik Corporation.
Commonly used to temporarily affix paper or card items to a flat
surface.