Auxdio DM837 User manual

DM837
User's Manual
High Fidelity Digital Amplifier
Guangzhou DSPPA Audio Co., Ltd.
No.1 Xiahe Rd, Jianggao Town,
Baiyun District, Guangzhou, China
Tel: [phone]
Company website: www.auxdio.com
Technical data is subject to change without notice.。

Content
Features
Basic functions
Control panel description
ON/OFF and standby operation
Play function
FM play
USB play
SD play
Bluetooth play
AUX play
Set
Set the system
Bluetooth and volume configuration
Remote description
Specification
Size
Installation and connection
Cartridge installation
Box installation
Disassembly
Packing list
1
2
2
2
3
3
4
6
6
7
8
8
9
10
13
11
11
12
15
16
16

- 1 -
Features
● With music control center, convenient and easy-operating
● Luxurious design, 3.5-inch TFT LCD screen, capacitive touch operation
● Five mode options: FM radio, USB , SD, Bluetooth, AUX.
● With compressed and lossless audio formats MP3, WMA, WAV, FLAC
● Support auxiliary input sensitivity (adjustable).
● Support FM radio; can search channels manually and automatically
; can save 20 channels at most.
● Wide voltage input, fit in with 100 ~ 240VAC, 50 / 60Hz.
● Class D differential output
● Support infrared remote control operation
● Support RS485 control
- 2 -
Basic Functions
1. Control Panel Instructions
2. Operation of on/off and standby
ON: Turn the key to the right and start the boot.
OFF: Turn the key to the left and turn it off
*For product appearance color, the real object in kind prevail
ONOFF
Operation screen
Infrared receiving ports
Switch
SD port
USB port

Play function
1. FM play
Twice-click the "FM" key to enter the radio mode。
- 3 -
1 2
4
5
3
8
7
9
10
Pic. 1
6
2. USB play
Twice click “ USB ”in the homepage and it will enter USB play mode.
- 4 -
1
2
1. B utton of "Return "; press it and it will return to FM interface.
2. Radio list navigation bar, it can turn the page up and down when
there are many pages,
3. The radio list display area. It displays the stored radio stations.
( Save / cancel the saving in the FM interface to add or delete the
station in the list.)
Pic.2
3
1 2
5
4
3
67
8
Pic.3
Playing
Radio list
1. B utton of "Return "; click it and it will r eturn to homepage.
2. Radio list button; click it and it will enter radio list interface(Pic.2).
3. It displays the current mode.
4. Button of radio frequency subtle tuning: press ”＜“ and the
frequency will go down; press "＞" and it will go up. Long press
“＜”or “＞”and it can half-automatically search radio’s
frequency and the searching will stop when available channel is searched .
5. Displays the current radio frequency.
6. Display the status
7. Button to save/keep the radio channel. Press it and the channel will be
saved .Press it again and it will be canceled
8. Button of fully automatic channel searching. Available frequency will
be saved to the radio list when it is searched
9. Radio channel switch button. Press it to move forward or backward.
10. Volume button, press it and it will be mute; slide the“ ”and
the volume will be adjusted.

1. Return button. Press it to return to homepage.
2. Play list button. Click it to enter the play list interface (Figure 4).
3. Displays the current mode.
4. Information of the song being played.
5. The playing process bar.
6. Playing control button: the previous song, play / pause, the next song.
7. Playing mode button
8. Volume button. Press it and it will go mute; slide the bar “ “ and
it will adjust the volume
Pic. 4
- 5 - - 6 -
1
2
3
1. Button of "Return". Press it and return USB playing interface.
2. Play list navigation bar . It can turn page up and down when
there are many pages.
3.Playing list area, it shows the music list in USB .
3. SD play
Twice click "SD" to use SD playing mode
。
Pic.5
1 2
5
4
3
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1. Return button. Press it to return to homepage.
2. Play list button. Click it to enter the play list interface (Figure 4).
3. Displays the current mode.
4. Information of the song being played.
5. The playing process bar.
6. Playing control button: the previous song, play / pause, the next
song.
7. Playing mode button
8. Volume button. Press it and it will go mute; slide the bar “ “
and it will adjust the volume
4. Bluetooth play
Twice click “Bluetooth ”to use Bluetooth play mode.
Playing list

1
2
4
5
3
1. Return button. Press it to return to homepage.
2. Displays the current mode.
3. Displays the Bluetooth connection status
4. Information of the song being played.
5. Playing control button: the previous song, play / pause, the next song.
6. Volume button. Press it and it will go mute; slide the bar “ “
and it will adjust the volume
Pic. 6
5. AUX play
Twice click "AUX" icon to use AUX play mode。
- 7 -
1
2
3
Set the system
Twice click“ ” icon to enter system setting interface.。
- 8 -
1. Return button. Press it to return to homepage.
2. Displays the current mode.
3. Volume button. Press it and it will go mute; slide the bar “ ”,
and it will adjust the volume
Setting
There are following information in the setting interface：
1. Address
2. Language:, switchable system language
3. Backlight:you can set when to stand by the system without
operation for a certain period of time
4. Treble/bass adjustment setting
5. AUX sensitivity:, you can set the AUX sensitivity level
6. Baud rate setting
7. System information display: It displays system version No, device
Bluetooth name and connection password
Bluetooth
Connected

Remote description
1
2
3
5
7
8
4
6
- 10 -
Bluetooth and volume configuration
Prepare a computer first and connect it to the device through the USB
cable. Turn on the DM837 configuration software in the computer.
1. Modify the password and set the Bluetooth name
① Click the "Find DM837" button on the left side of the homepage
of the software,and then device’s information will show up in the top.
t
② Fill the name and password tha 's to be changed below “Bluetooth”.
Click “Configure” and it will be finished (Password can be empty).
Software homepage
XXX
Find DM 837
Conf igure
Conf igure
DM8 37 C onfig ur ation
Blue toothBlue toothBlue tooth
Maxi mum volum e li mitMaxi mum volum e li mitMaxi mum volum e li mit
Nam e Pwd
25％50％7 5％100％
Fin di ng D M83 7. ..
Rea d ID OK , as fo ll ow:
Vend or ID :0x A5A
Pro du ctI D :0x 201
Vers io nNu mbe r: 0x1 00
XXX
Find DM 837
Conf igure
Conf igure
DM8 37 C onfig ur ation
Blue toothBlue toothBlue tooth
Maxi mum volum e li mitMaxi mum volum e li mitMaxi mum volum e li mit
Nam e Pwd
25％50％7 5％100％
Fin di ng D M83 7...
Rea d ID OK , as fo ll ow:
Vend or ID :0x A5A 5
Pro du ctI D :0x 201
Vers io nNu mbe r: 0x1 00
Con figur ing blu etoot h
nam e= DM 83 7,p wd= 12 345 6
Sen d da ta ok!
DM 837 1 23 645 6
①
②
Volume limit setting area
- 9 -
2. Maximum volume limit for the device
Here you can limit the total output volume of the device, you can set the
total volume of "25%" "50%”
Click “Configure” and it will be finished
Homepage of the software
1. Standby switch
2. Mode selection. Click the button to cycle through the mode: FM,
USB, SD, Bluetooth, AUX.
3. Mute
4. Sound mode selection.
5. Menu (not available).
6. Play controlling area. Can play / pause, the previous song, the
next song, the volumecontrol.
7. Play mode selection. Click the button to cycle through the
display: single cycle, the order of play
8. Numeric keypad: In the USB/SD card mode, the number keys
directly select the track to play .In the FM radio mode, the
number keys directly enters the FM frequency .
* The input range is 0870 ~ 1080. If the input frequency is out of
range, it will not respond. For example: 0875 input means 87.5MHz

Installation and connection
Coonection port description：
① ~100-240VPower input
② Fmantenna
③ Signal ground line
④ Audio input 1 (2 × 0.3mm² dual shielded audio cable)
⑤ RS485 interface⑥ Amplifier output (oxygen-free copper)
Note: All wire connections must not be exposed .
① ⑤ ⑥③② ④
Rear of the amplifier
- 12 -
Parameters
Power Supply Input
2 ×10W
Output Power
~100-240V/50/60Hz
Rated Impedance 8Ω
Total Harmonic Distortion ≤0.03% (1KHz, 1W, 8Ω)
Signal to Noise Ratio >81dB
Frequency Response 20Hz – 20KHz
Product size 86×86×38mm
Bluetooth input BT4.1
Remote control effective firing area angle 60°
Effective remote control distance 10m
Remote control batter y
CR2032
Auxiliar y input sensitivity (adjustable) AUX AUX: 1.0V / 500mV
Audio format MP3，WMA，WAV，FLAC etc
Storage type SD 、USBcard
Product Size
- 11 -
Control inter face RS485
Remote
control
Controller

Connect the connector to the interface of the Bluetooth digital
amplifier base, and then fix the Bluetooth digital amplifier base
with two screws on the two mounting posts of the mounting box
Put he connector through the reserved hole around the box, and put
the mounting box into the wall groove by using four self-tapping
screws to fix the mounting box firmly in the wall groove.
②
As shown in the demonstration below, select two buckles in the
direction of A or B, and pull the outer edge out of it so that the
snap is disengaged; carefully disconnect the front panel of the
Bluetooth digital amplifier from the base.
③
④
A B
Front panel
base
groove in
the wall
- 14 -
* Please arrange the alignment with the opening position of
the actual mounting box.
Dig a groove fit in with the box in the wall and drill holes in
the groove in the wall for connection later according to the
screw holes at the four corners of the box bottom.
①
Groove in
the wall
*Reserved
openings
Interface terminal sub-function table
Function Power
Icon
Name
N L
Zero
Line
Fire
Wire
Power Output 8Ω
OUTL- OUTL+ OUTR- OUTR+
Left
speaker
negative
end
Left
speaker
positive
end
Right
speaker
negative
end
Right
speaker
positive
end
FM AUX RS485
R L A B
Signal
ground
Audio
input
right
Audio
input
left
A B
ANT
FM
Antenna
GND
Installation
●Mounting box installation Note: The size of the mounting
box you have purchased can not be less than 40mm.
- 13 -

①
●Disassembly
Use a flattened screwdriver to aim at the buckle beside the gap
and carefully pry the buckle, and then grasp the front panel with
both hands, so that the front panel of the amplifier is as parallel
as possible to the base. Be careful not to damage the pins on the
base.
②
Screwdriver
Package List
Digital power amplifier
Remote Control
1
Component quantity
1
1
- 16 -
Connect the front panel of the Bluetooth digital amplifier in
parallel with the fixed base, and close it tightly and carefully
and check the stability.
* Please arrange the alignment with the open position of the box
Put the connector through the reser ved holes around the box,
and put the mounting box into the wall groove by using four
self-tapping screws to fix the mounting box firmly in the wall
groove.
①
● Note on box installation：the depth of the box must not be
less than 40mm。
*reser ved
holes
⑤
Note: When the front panel and the base is fastened, insert the pin
into the front panel hole. The needle can not be bent or damaged,
otherwise it will cause serious damage to the amplifier.
groove in the wall
②
- 15 -
groove in the wall
Please refer yo step 3,step 4 and step 5 of the mounting box
installation to complete the installation.
Find the gap of the combination position between the right of front
panel of amplifier and the base.
Product Manual

Warning Statement
This device complies with part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may cause
undesired operation.
Any Changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference
to radio communications. However, there is no guarantee that interference will not
occur in a particular installation. If this equipment does cause harmful interference to
radio or television reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or more of the
following measures:
-Reorient or relocate the receiving antenna.
-Increase the separation between the equipment and receiver.
-Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
-Consult the dealer or an experienced radio/TV technician for help.
This equipment complies with FCC radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with
minimum distance 20cm between the radiator & your body.
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