Neets 312-0003 User manual

Page 1 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Foreword:
The purpose of this document is to describe how to install and configure the 3 versions of the Neets Audio
Amplifier.
COPYRIGHT - All information contained in this manual is the intellectual property of and copyrighted material
of Neets. All rights are reserved. You may not allow any third party access to content, information or data in
this manual without Neets’ express written consent.
CHANGES - Neets reserve the right to change the specification and functions of this product without any
notice.
Questions, AFTER reading this manual, can be addressed to your local dealer or:
Neets A/S –DK-8700 Horsens
by E-Mail: [email protected]
or you may use our contact form at www.neets.dk

Doc. no: 312-0003-002-001 Rev 1.06 Page 2 of 19
Revision list:
Author: Date
Description
Pages
TSA 21/01-09
First release.
All
TSA 06/06-09
Small adjustments to make things more clear.
13, 14
TSA 07/06-09
Firmware upgrade done image, was wrong image.
6
TSA 07/06-09
Image and text on page changed.
19
JML 23/06-09
Added description of how to ask for current state and minor changes in
examples.
15,16
SDV 27/01-10
Text added
5
SDV 15/02-10
New pictures
All
TSA 08/06-11
Removed wake on signal
All
DB 13/12-11
Contact information
1
From serial number (and forward) there is no longer the possibility to use Wake on Signal:
312-0001: 110700050
312-0002: 100800450
312-0003: 090900091

Page 3 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Table of content
Foreword: .............................................................................................................. 1
Revision list:........................................................................................................... 2
Table of content..................................................................................................... 3
Description: ........................................................................................................... 4
What is class “D” amplifier?:......................................................................................................................... 5
What is line level on our amplifier?: ............................................................................................................. 5
Phantom power: ........................................................................................................................................... 5
RS-232 cable connections: ............................................................................................................................ 5
RS-232 loopthru: ........................................................................................................................................... 5
LAN to RS-232 loopthru: ............................................................................................................................... 5
Firmware upgrade of units:........................................................................................................................... 6
Connections on units –312-0001: .......................................................................... 7
Left side:........................................................................................................................................................ 7
Top end: ........................................................................................................................................................ 7
Right side:...................................................................................................................................................... 7
Specifications 312-0001: ........................................................................................ 8
Connections on units –312-0002: .......................................................................... 9
Left side:........................................................................................................................................................ 9
Top end: ........................................................................................................................................................ 9
Right side:...................................................................................................................................................... 9
Specifications 312-0002: ...................................................................................... 10
Connections on units –312-0003: ........................................................................ 11
Left side:...................................................................................................................................................... 11
Top end: ...................................................................................................................................................... 11
Right side:.................................................................................................................................................... 11
Specifications 312-0003: ...................................................................................... 12
Special functions on 312-0003:............................................................................. 13
Homepage control: ..................................................................................................................................... 13
Fault finding:........................................................................................................ 13
Amplifier Communications protocol .................................................................... 14
Admin audio ................................................................................................................................................ 14
Input 1-4...................................................................................................................................................... 14
Microphone................................................................................................................................................. 14
Admin .......................................................................................................................................................... 14
RS-232: 1 to 3 .............................................................................................................................................. 15
Global functions .......................................................................................................................................... 15
Examples for use of the protocol ................................................................................................................ 15
Examples for use of the protocol –continued............................................................................................ 16
Application drawing 312-0001, 312-0002 and 312-0003 ....................................... 17
Application drawing 312-0002 and 312-0003 ....................................................... 18
Application drawing 312-0003 ............................................................................. 19

Doc. no: 312-0003-002-001 Rev 1.06 Page 4 of 19
Description:
The Neets Audio Amplifier version 1-3 are all intended for single room applications, they may be used for other
things but the idea behind them is single room applications (ex. Class- or meeting-room).
All 3 versions are high performing class “D” amplifiers, and they can all be controlled over RS-232. Bellow you
will find the specifications for the 3 models.
Version 1
Version 2
Version 3
Description
Part number#:
Version 1
312-0001
Version 2
312-0002
Version 3
312-0003
Output power in 8 ohm RMS
2*15 Watt
2*25 Watt
2*25 Watt
Class of operation
D
D
D
Short circuit safe speaker outputs
Yes
Yes
Yes
Unbalanced line input (0.316 VRMS, -10dBV)
3
4
3
Balanced line input (0.316 VRMS, -10dBV)
0
0
1
Preamplifier out (Level control depending on volume settings)
0
0
1
Microphone input (Phantom power possible 24VDC)
0
0
1
Direct connection for Mute button (Active pulse < 0.2 VDC)
Yes
Yes
Yes
Direct connection for volume up/down (Active pulse < 0.2 VDC)
Yes
Yes
Yes
Direct connection for input selection (Active pulse < 0.2 VDC)
Yes
Yes
Yes
RS-232 Control
Yes
Yes
Yes
RS-232 with loopthrough
No
Yes
Yes
LAN Loopthrough (LAN to RS-232)
0
0
3
LAN control
No
No
Yes
Homepage control (Thru web browser)
No
No
Yes
Channel select
Yes
Yes
Yes
Channel preset gain
Yes
Yes
Yes
Channel preset Balance
Yes
Yes
Yes
Channel preset Bass
Yes
Yes
Yes
Channel preset Treble
Yes
Yes
Yes
Master Volume
Yes
Yes
Yes
Master Bass
Yes
Yes
Yes
Master Treble
Yes
Yes
Yes
Mute
Yes
Yes
Yes

Page 5 of 19 Doc. no: 312-0003-002-001 Rev 1.06
What is class “D” amplifier?:
A switching amplifier or class-D amplifier is an electronic amplifier which, in contrast to the active resistance
used in linear mode AB-class amplifiers, uses switching mode of transistor to regulate power delivery. The
amplifier, therefore, features the high power efficiency (low energy losses), which additionally results in lower
weight by eliminating the bulky heat sinks. Additionally, if voltage conversion is necessary, the on-the-way high
switching frequency allows the bulky audio transformers to be replaced by small inductors. Low pass LC-
filtering smoothes the pulses out and restores the signal shape on the load.
What is line level on our amplifier?:
Line level is a term used to describe the strength of an audio signal used to transmit analog sound information
between audio components such as CD and DVD players, TVs, audio amplifiers, and mixing consoles, and
sometimes MP3 players. In contrast to line level, there are weaker audio signals, such as those from
microphones and instruments pickups, and stronger signals, such as those used to
drive headphones and loudspeakers. The strength of the various signals does not necessarily correlate with the
output voltage of a device; it also depends on the source's output impedance, or the amount of current
available to drive different loads. The most common nominal level for consumer audio equipment is −10 dBV
(0,316 VRMS), and the most common nominal level for professional equipment is 4 dBV.
Phantom power:
Phantom power (labeled as +48 V on some audio equipment - also +12 V or + 24 V in some applications) is a
method that sends a DC electrical voltage through microphone cables. It is best known as a common power
source for condenser microphones, though many active DI boxes also use it. In Neets Audio Amplifier version 3
we use 24 VDC as phantom power.
RS-232 cable connections:
To connect the Audio Amplifier you must wire the RS-
232 cable as shown here to the right. This is a Female
9 pin SUB-D connector, what will fit into a standard
computer RS-232 port, or any USB to RS-232
converter.
RS-232 loopthru:
312-0002 and 312-0003 has the possibility to make
“RS-232 loopthru” by this means, if the audio amplifier is connected to one of Neets Control systems (all
systems except Neets Control QueBec) you will get an “extra” RS-232 port.
You control the audio amplifier thru RS-232 port 1 (connect this port to the control system), and you can
connect (e.g. a projector) to RS-232 port 2 on the audio amplifier. When doing so and setting the system
correct up in the “Neets Product Configurations Software” you will be able to control the audio amplifier and
the projector from one (1) comport on the control system.
Please be aware that the first time you set up the system with a Neets Control system, the power must be
connected to the Neets Control system AFTER the Audio Amplifier.
LAN to RS-232 loopthru:
The 312-0003 has the possibility to make “LAN to RS-232 loopthru” by this means that if you use our control
system Neets Control –EU, professional (P/N#: 307-0002) and you connect both the Audio amplifier and the
Neets Control –EU, professional to a LAN network, you will get additional 3 RS-232 ports to control external
devices (located on the audio amplifier). So by using this function you will, on the Neets Control –EU,
professional get in total 5 RS-232 ports, and on top of that have control over the audio amplifier.

Doc. no: 312-0003-002-001 Rev 1.06 Page 6 of 19
Firmware upgrade of units:
This section describes how to firmware upgrade the units. On 312-0003 you can upgrade the unit by using the
homepage (go to [maintenance] page and use the upgrade firmware). On all units you can use the procedure as
bellow.
First you need to go to www.neets.dk and find the newest version (or the version you want). The filename of
the firmware are “aud_0100.bin” for version 1.00 (version 2.03 will be named “aud_0203.bin”.
Then you need to have a Micro SD to USB converter, you can get those from the internet (search google for
“buy micro SD to USB converter” they cost from 10EUR) or by contacting Neets or you local distributor.
xWhen you have the correct firmware and a converter to copy the file
to the Micro SD card from your computer you are ready to firmware
upgrade you unit.
xFirst you MUST disconnect the power from the audio amplifier.
xThen remove the SD Card from the unit by pushing the SD Card gently
into the unit about 1mm (either by using your finger tips or a flat
screwdriver) and then let go and it will slide out.
xPlace the Micro SD card into the adapter (e.g. USB adapter).
xConnect the adapter to your computer.
xBrowse to the root of the folder of you SD card (e.g. : L:\) and copy
the file you have downloaded to the root folder (in this case
“aud_0100.bin”). Please make sure that you do not delete anything
else from the card.
x
xUse safe way of removing the Micro SD card from your computer.
xInsert the Micro SD card to the unit (while power still is off)
xConnect power
xWait for LED to indicate “firmware done” (see the picture here to the
right for LED indication). Input 1 will light up, while Standby and mute
will make “light show”
xDisconnect power and reconnect power. YOU ARE DONE…!
How to remove the SD
-Card
REMEMBER
to remove
power from unit before
removing Micro SD
card!
SD Card insert to computer
Firmware upgrade done..!

Page 7 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Connections on units –312-0001:
Left side:
Number
Description
1:
Power in
2:
Volume control
3:
RS-232 control port
4:
Standby LED
5:
Mute LED
6:
Input 3 LED
7:
Input 2 LED
8:
Input 1 LED
9:
Right speaker
10:
Left speaker
Top end:
Number
Description
11:
Micro SD-Card
Right side:
Number
Description
12:
Line Input 3
13:
Line Input 2
14:
Line Input 1
15:
Input select switch
16:
Mute input
17:
Input select

Doc. no: 312-0003-002-001 Rev 1.06 Page 8 of 19
Specifications 312-0001:
Output (speakers):
Power (@ 8 ohm):
2 * 15 Watt
Connections (2 pcs.):
2 pin 3.81mm screw block
Speaker impedance:
8 ohm (Ω)
THD+N @ 25 Watt 8 ohm:
< 0.25% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:
< 0.1% (@1KHz)
Output efficiency:
up to 90%
Audio inputs:
Unbalanced inputs:
3
Connectors:
3 pin 3.82mm screw block
Input level (all inputs):
0VRMS–2VRMS Nominal:
0.316 VRMS (-10dBV)
Channel separation:
> 90 dB
Input impedance:
> 15 K ohm (Ω)
Direct buttons control
Buttons functions:
Input sel, Mute, Volume
Button mode:
Momentary
Activation of button:
Low < (GND + 0.2 VDC)
RS-232 Remote Control
Control connected to:
RS-232-1
Baud rate:
9600
Data bits:
8
Stop bits:
1
Parity:
None
Protocol:
Neets
SD-Card (Storage card)
Type:
Micro –SD, Standard type
Card:
Max size 1GB
File system:
FAT 16
General
Power input (AC):
100 –240 VAC (47-63 Hz)
Power input (DC):
24 VDC 2.5A (Regulated)
Storage temperature:
-30°C to 70°C (Non
condensing)
Operating temperature:
0°C to 45°C (Non condensing)
Dimension (without
connectors):
70mm (2.7”) x 150mm (5.9”)
x 40mm (1.6”)
Weight (no PSU):
250gramm (0.5 lbs)
Weight (Shipping):
1000g (2.2 lbs)

Page 9 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Connections on units –312-0002:
Left side:
Number
Description
1:
Power in
2:
Volume control
3:
RS-232 control port 1
4:
RS-232 control port 2
5:
Standby LED
6:
Mute LED
7:
Input 4 LED
8:
Input 3 LED
9:
Input 2 LED
10:
Input 1 LED
11:
Right speaker
12:
Left speaker
Top end:
Number
Description
13:
Micro SD-Card
Right side:
Number
Description
14:
Line Input 4
15:
Line Input 3
16:
Line Input 2
17:
Line Input 1
18:
Input select switch
19:
Mute input
20:
Input select

Doc. no: 312-0003-002-001 Rev 1.06 Page 10 of 19
Specifications 312-0002:
Output (speakers):
Power (@ 8 ohm):
2 * 25 Watt
Connections (2 pcs.):
2 pin 3.81mm screw block
Speaker impedance:
8 ohm (Ω)
THD+N @ 25 Watt 8 ohm:
< 0.35% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:
< 0.1% (@1KHz)
Output efficiency:
up to 90%
Audio inputs:
Unbalanced inputs:
4
Connectors:
3 pin 3.82mm screw block
Input level (all inputs):
0VRMS–2VRMS Nominal:
0.316 VRMS (-10dBV)
Channel separation:
> 90 dB
Input impedance:
> 15 K ohm (Ω)
Direct buttons control
Buttons functions:
Input sel, Mute, Volume
Button mode:
Momentary
Activation of button:
Low < (GND + 0.2 VDC)
RS-232 Remote Control
Control connected to:
RS-232-1
Baud rate:
9600
Data bits:
8
Stop bits:
1
Parity:
None
Protocol:
Neets
RS-232 loopthru:
External device:
Baud rates:
1200 –115200 bits/sec
Parity:
Even, Odd, None
Data bits:
7 –8
Stop bits:
Other information:
1, 1½, 2
Control connected to:
RS-232-1
Device connected to:
RS-232-2
Control possible to use:
All Neets (minus: Neets
Control QueBec)
SD-Card (Storage card)
Type:
Micro –SD, Standard type
Card:
Max size 1GB
File system:
FAT 16
General
Power input (AC):
100 –240 VAC (47-63 Hz)
Power input (DC):
24 VDC 2.5A (Regulated)
Storage temperature:
-30°C to 70°C (Non
condensing)
Operating temperature:
0°C to 45°C (Non
condensing)
Dimension (without
connectors):
70mm (2.7”) x 150mm
(5.9”) x 40mm (1.6”)
Weight (no PSU):
250gramm (0.5 lbs)
Weight (Shipping):
1000g (2.2 lbs)

Page 11 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Connections on units –312-0003:
Left side:
Number
Description
1:
Power in
2:
Volume control
3:
RS-232 control port 3
4:
RS-232 control port 2
5:
RS-232 control port 1
6:
Standby LED
7:
Mute LED
8:
Input 4 LED
9:
Input 3 LED
10:
Input 2 LED
11:
Input 1 LED
12:
Left speaker
13:
Right speaker
14:
Preamplifier out
Top end:
Number
Description
15:
Micro SD-Card
Right side:
Number
Description
16:
Balanced line Input 4
17:
Microphone input
18:
Line Input 3
19:
Line Input 2
20:
Line Input 1
21:
Input select switch
22:
LAN (network) connector
23:
Mute input
24:
Input select

Doc. no: 312-0003-002-001 Rev 1.06 Page 12 of 19
Specifications 312-0003:
Output (speakers):
Power (@ 8 ohm):
2 * 25 Watt
Connections (2 pcs.):
2 pin 3.81mm screw block
Speaker impedance:
8 ohm (Ω)
THD+N @ 25 Watt 8 ohm:
< 0.35% (@1KHz - 10KHz)
THD+N @ 1 Watt 8 ohm:
< 0.1% (@1KHz)
Output efficiency:
up to 90%
Audio inputs:
Unbalanced inputs:
3
Connectors:
3 pin 3.82mm screw block
Balanced inputs:
1
Connectors:
5 pin 3.82mm screw block
Input level (all inputs):
0VRMS–2VRMS Nominal:
0.316 VRMS (-10dBV)
Channel separation:
> 90 dB
Input impedance:
> 15 K ohm (Ω)
Audio output (preamp out)
Number of outputs:
1
Connectors:
3 pin 3.82mm screw block
Output level:
0VRMS –0.316 VRMS
Channel separation:
> 90 dB
Output impedance:
< 500 ohm (Ω)
Microphone input
Number of inputs:
1
Phantom power:
24 VDC
Input sensitivity:
1.5mV/Pa to 5mV/Pa +/-
3dB(Open circuit @ 1KHz)
RS-232 Remote Control
Control connected to:
RS-232-1
Baud rate:
9600
Data bits:
8
Stop bits:
1
Parity:
None
Protocol:
Neets
RS-232 loopthru:
External device:
Baud rates:
1200 –115200 bits/sec
Parity:
Even, Odd, None
Data bits:
7 –8
Stop bits:
Other information:
1, 1½, 2
Control connected to:
RS-232-1
Device connected to:
RS-232-2
Control possible to use:
All Neets (minus: Neets
Control QueBec)
Network (LAN)
Speed:
10/100Mbit
Duplex:
Half and full
DHCP:
Default set to OFF
Default IP address
192.168.254.252
Homepage address:
80, non changeable
TCP Control port:
5000, non changeable
Access RS-232-1 port:
5010, non changeable
Access RS-232-2 port:
5011, non changeable
Access RS-232-3 port:
5012, non changeable
SD-Card (Storage card)
Type:
Micro –SD, Standard type
Card:
Max size 1GB
File system:
FAT 16
General
Power input (AC):
100 –240 VAC (47-63 Hz)
Power input (DC):
24 VDC 2.5A (Regulated)
Storage temperature:
-30°C to 70°C (Non
condensing)
Operating temperature:
0°C to 45°C (Non
condensing)
Dimension (without
connectors):
70mm (2.7”) x 150mm
(5.9”) x 40mm (1.6”)
Weight (no PSU):
250gramm (0.5 lbs)
Weight (Shipping):
1000g (2.2 lbs)

Page 13 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Special functions on 312-0003:
Homepage control:
The unit has the possibility to be controlled
thru a homepage, simple go to the IP
address of the unit in a web browser, and
you will see the homepage as shown here.
You can either make changes that work
immediately (e.g. volume up/down, input
select) or you can make default settings. To
change immediately changed settings to
default, simple press the “Save as default”
button in lower right hand corner.
Please remember the default IP address is
192.168.254.252, username and password
is both “Admin” case sensitive.
Fault finding:
Fault:
Solution
LED indication on Audio amplifier:
Check you speaker cable, and reboot unit. Have you
been playing to loud?
There has been put new firmware on the unit.
Please reboot unit
Did you remove the Micro SD card? Then insert it
again.
Please contact your distributor or Neets technical
support.
Please contact your distributor or Neets technical
support.
Copy firmware to Micro SD card and insert Micro SD
card,
and connect power
Copy firmware to Micro SD card and insert Micro SD
card, and connect power
WAIT, and do NOT disconnect power
WAIT, and do NOT disconnect power

Doc. no: 312-0003-002-001 Rev 1.06 Page 14 of 19
Amplifier Communications protocol
Admin audio
Description
Syntax
Data
Read/Write
Default
Select input 1 –4
NEAMP1,INPUT=<data>
1 –4 (3 in 312-0001)
R/W
1
Set volume
NEAMP1,VOL=<data>
0 –51
R/W
0
Set bass
NEAMP1,BASS=<data>
-7 –7
R/W
0
Set treble
NEAMP1,TREBLE=<data>
-7 –7
R/W
0
Set balance
NEAMP1,BAL=<data>
-79 –79
R/W
0
Mute
NEAMP1,MUTE=<data>
ON , OFF
R/W
OFF
Power state (When the amp
are turned off it restores it
defaults values)
NEAMP1,POWER=<data>
ON , OFF
R/W
OFF
Input 1-4
Description
Syntax
Data
Read/Write
Default
Preset input 1 –4, bass
NEAMP1,INPUT:<input>,BASS=<data>
-7 –7
R/W
0
Preset input 1 –4, treble
NEAMP1,INPUT:<input>,TREBLE =<data>
-7 –7
R/W
0
Preset input 1 –4, gain
NEAMP1,INPUT:<input>,GAIN=<data>
0 –15
R/W
0
Preset input 1 –4, balance
NEAMP1,INPUT:<input>,BAL=<data>
-79 –79
R/W
0
Microphone
Description
Syntax
Data
Read/Write
Default
Microphone gain
NEAMP1,MICGAIN=<data>
0 –63
R/W
25
Phantom power
NEAMP1,PHANTOMPOWER=<data>
ON, OFF
R/W
OFF
Admin
Description
Syntax
Data
Read/Write
Default
Set amp IP address
NEAMP1,IPADDRESS=<data>
xxx.xxx.xxx.xxx
R/W
192.168.254.252
Set amp sub net
NEAMP1,IPSUBNET=<data>
xxx.xxx.xxx.xxx
R/W
255.255.255.0
Set amp gateway
NEAMP1,IPGATEWAY=<data>
xxx.xxx.xxx.xxx
R/W
192.168.254.1
Select if DHCP are used or not.
NEAMP1,IPDHCP=<data>
ON, OFF
R/W
OFF
Amp, SN
NEAMP1,UNITSN=<data>
8 character
R
Amp, Username for homepage
NEAMP1,WWWUSER=<data>
Max 8 character
R/W
Admin
Amp, Password for homepage.
NEAMP1,WWWPSW=<data>
Max 8 character
R/W
Admin
LAN speed (F = Full duplex,
H = Half duplex)
NEAMP1,IPSPEED=<data>
10F, 10H, 100F,
100H
R/W
100F
RS-232 Remote Control port settings
RS-232 port:
1
Baud rate:
9600
Data bits:
8
Stop bits:
1
Parity:
None
Protocol:
As bellow
Network LAN port settings
TCP port:
5000
Protocol:
As bellow

Page 15 of 19 Doc. no: 312-0003-002-001 Rev 1.06
RS
-232: 1 to 3
Description
Syntax
Data
Read/Write
Def.
Set the comport
baudrate
NEAMP1,COM:<port>,BAUDRATE=<data>
1200,2400,4800,
9600,14400,19200,
38400,57600,115200
R/W
9600
Set the comport data bit
NEAMP1,COM:<port>,DATABIT=<data>
7, 8
R/W
8
Ser the comport parity
NEAMP1,COM:<port>,PARITY=<data>
NONE, ODD or EVEN
R/W
NONE
Set the comport stop bit
NEAMP1,COM:<port>, STOPBIT =<data>
1 or 2
R/W
1
Global functions
Description
Syntax
Data
Read/Write
Default
Save the current settings as
the default startup values.
NEAMP1,SAVE=TRUE
W
Restore factory defaults
values for the entire system.
NEAMP1,FACTORYDEFAULT=<data>
AUDIO, COM,
LAN or ALL.
W
Set all the values to their
default (last saved).
NEAMP1,RESET=<data>
AUDIO, COM,
LAN or ALL.
W
All commands that are in a span (e.g. Set volume 0-51, Select input 1-4, or Set balance -79 –79 and
so on…) can be used with INC (increment 1) or DEC (decrement 1) commands. E.g. if the volume is
25 and you send NEAMP1,VOL=DEC<CR> then the volume will be 24.
When asking for a current state of a command simply replace the <data> in the command with “?”.
All the commands must be terminated with <CR> (0x0D in HEX value).
When a command is successful executed the amplifier retunes: NEAMP1,OK<CR>
If the commands that are sent are unknown the amplifier returns: NEAMP1,ERR<CR>
Examples for use of the protocol
Setup your RS-232 port to the following values:
xBaudrate: 9600
xDatabits: 8
xStopbits: 1
xParity: None
E.g. for setting the audio amplifier to input 2 and gain for that input to 3
Set gain to 3 on input 2:
Send: NEAMP1,INPUT:2,GAIN=3 <CR>
Response: NEAMP1,OK <CR>
Select the input 2 to be played:
Send: NEAMP1,INPUT=2 <CR>
Response: NEAMP1,OK <CR>
E.g. ask for input gain on input 2:
Send: NEAMP1,INPUT:2,GAIN=?<CR>
Response: NEAMP1,OK,INPUT:2,GAIN=3<CR>

Doc. no: 312-0003-002-001 Rev 1.06 Page 16 of 19
Examples for use of the protocol –continued
Here we will try to set up the audio amplifier to have some default parameters, turn on, mute on, mute off, and
turn off again.
Default parameters:
xDefault input: Input 2
xDefault power: off
xDefault volume: 20
To set up above default parameters (and leave the rest factory default) send the following commands to the
audio amplifier (NOTE: <CR> is the 0x0D HEX value for Carriage Return):
xSend: NEAMP1,FACTORYDEFAULT=ALL<CR>
xResponse: NEAMP1,OK <CR>
xSend: NEAMP1,INPUT=2<CR>
xResponse: NEAMP1,OK <CR>
xSend: NEAMP1,POWER=OFF<CR>
xResponse: NEAMP1,OK <CR>
xSend: NEAMP1,VOL=20<CR>
xResponse: NEAMP1,OK <CR>
xSend: NEAMP1,SAVE=TRUE<CR>
xResponse: NEAMP1,OK <CR>
Now we want to turn on the unit, send the following commands to the audio amplifier (NOTE: <CR> is the 0x0D
HEX value for Carriage Return):
xSend: NEAMP1,POWER=ON<CR>
xResponse: NEAMP1,OK <CR>
Now we want to mute and on mute the audio amplifier, send the following commands to the audio amplifier
(NOTE: <CR> is the 0x0D HEX value for Carriage Return):
xSend: NEAMP1,MUTE=ON<CR>
xResponse: NEAMP1,OK <CR>
To get out of mute send:
xSend: NEAMP1,MUTE=OFF<CR>
xResponse: NEAMP1,OK <CR>
Now we want to turn off the unit, send the following commands to the audio amplifier (NOTE: <CR> is the 0x0D
HEX value for Carriage Return):
xSend: NEAMP1,POWER=OFF<CR>
xResponse: NEAMP1,OK <CR>

Page 17 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Application drawing 312-0001, 312-0002 and 312-0003
Bellow application for all models of our amplifier.
The Neets Control –EU, professional is controlling the audio amplifier on RS-232 port 2 on the control system,
and is connected to RS-232-1 on the audio amplifier. Furthermore the Neets Control –EU, professional is
controlling the screen thru I/O and the projector on RS-232 port 1.

Doc. no: 312-0003-002-001 Rev 1.06 Page 18 of 19
Application drawing 312-0002 and 312-0003
Bellow application for the 2 biggest models of our amplifier.
The Neets Control –FoXtrot is controlling the audio amplifier on the RS-232 port on the control system, and is
connected to RS-232-1 on the audio amplifier. The projector is connected to the “loopthru port” on the
amplifier (RS-232-2) and therefore the Neets Control –FoXtrot is also controlling the projector thru the audio
amplifier. The two I/O on the Neets Control FoXtrot is controlling the screen up/down.

Page 19 of 19 Doc. no: 312-0003-002-001 Rev 1.06
Application drawing 312-0003
Bellow application for the biggest model of our amplifier.
The Neets Control –EU, professional is controlling the audio amplifier on the LAN port on the control system.
The Audio amplifier is controlling the projector on RS-232-1 and the 4 –Relay box on RS-232-2 (screen
up/down), so here we uses 2 of the 3 RS-232 ports on the Audio amplifier, and only the LAN connector on the
Neets Control EU, professional