ALLO Boss2 User manual

Boss2 Manual
1. Features
•DAC CS43198 (192 kHz/32bit )
•DAC output is selectable (1.7Vrms or 2Vrms) .
•Sampling Frequency 44.1 kHz to 192 kHz range.
•Dual Ultra low Phase noise NDK SDA oscillators are used for master
Clock generation.(MCLK)
2. Hardware Description:
RPI4, Boss2, Oled , Alu box and remote included .

1.
Front : IR sensor, OLED Display Switch, SD card Side-1: RPI Power, HDMI connectors.
Rear side: RPI USB, Ethernet, 5V-DC in, RCA: RED-
Right, Black - Left
3.Power:
Boss2 support single and Dual Power adapters.
Single PSU (default)
For single power J18 jumper must be closed as below picture .
Power required is 5V-3A and should be connected through back panel DC In
connector .

Dual Power Adapter:
For dual psu J18 jumper should be open , Power adapter interface should be as
below Picture .
Power Adapter rating:
1. RPI USB type C rating: 5V 3A.
2. Back panel DC In Connector : 5V , 250ma (or higher).
.

Earthing:
Protective earth wire should be connected bottom of metal box as below ( to
Shanti for example). You can earth the unit by using a Nirvana SMPS with
earth switch on .
Connection between BOSS2 and Shanti (Dual Power)
A
BOSS2
OLED
DC
1A
SHANTI
USB
DC 3A
DC 1A
USB
TYPE C

Connection between BOSS2 and Nirvana(Dual Power)
Connection between BOSS2 and Nirvana(Single Power)
BOSS2
DC
SW
ON
DC
Nirvana
USB
TYPE C
Nirvana
DC
SW
ON
OLED
BOSS2
DC
SW
ON
DC
Nirvana
USB
TYPE C
OLED

Software Boss2 Driver and Configuration :
Boss2 dac Driver is included on RPI 5.4.77 kernel onwards. In some players
(Moode and more) Boss2 is configurable through GUI.
Manually configuring Boss2-DAC .
Check for allo-boss2-dac dtbo
Goto /boot/overlays/
Check for allo-boss2-dac-audio.dtbo file.
If Present edit the /boot/config.txt file and add/replace dtoverlay
with dtoverlay=allo-boss2-dac-audio
Front panel Display/OLED configuration:
Boss2 player Front Panel Display (OLED) application is based on Python and
need to install on respective OS. Installation steps refer below link.
http://3.230.113.73:9011/Allocom/Boss2/Boss2_oled_install_steps
Boss2 Player User settings can set through Front panel buttons or IR Remote
Front Panel Buttons: Left, OK/M, Right, Up (+), Down (-)
Buttons:
UP/Down Buttons –Volume Control
LEFT/RIGHT Buttons –MENU navigation
CENTRE or OK Button –By default MUTE/UNMUTE, selection button on MENU
NOTE: In IR separate button for MUTE
MENU:
SYSINFO –system information
HV-EN - High Voltage Enable/Disable –RMS (1.7 or 2.0 Volt) voltage setting.
ON –2.0 Volt
OFF –1.7 Volt
FILTER –Filter selection
PHCOMP –phase-compensation Enable/Disable
HP-FIL –High Pass Filter Enable/Disable

DE-EMP –De Emphasis Enable/Disable
NON-OS –NonOversampling Enable/Disable
F-SPEED –Filter Roll-off Interpolation Selection –FAST/SLOW
Default SCREEN
Shows volume level, playing bit rate, sample rate, mute state
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