Neets 2:25 Manual de usuario
Neets Audio Amplier 2:25
Neets Audio Preamplier
Installation Manual
Page 2 of 28
Foreword
This document describes how to install and operate the Neets Amp 2:25 and the Neets Preamp.
COPYRIGHT - All information contained in this manual is the intellectual property 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 prior notice.
Questions, AFTER reading this manual, can be addressed to your local distributor or:
Neets A/S
Langballe 4
8700 Horsens
Denmark
by E-Mail: [email protected]
or you may use our contact form at www.neets.dk
Revision list
This document (no: 230-028-312-0010) has the following revision changes:
Author: Date Description Pages Rev
MH: 27-04-2016 First release. All 1.00
What is in the box?
When you open the box it will contain the following items:
Neets Audio Amplier 2:25
1 x Neets Audio Amplier 2:25
24V Power adapter
Power cable for adapter
Terminal connectors
Screws and plugs for wall mounting
Screws for mounting on Neets Rack Shelf.
Manual
Neets Audio Preamplier
1 x Neets Audio Preamplier
12V Power adapter
Terminal connectors
Screws and plugs for wall mounting
Screws for mounting on Neets Rack Shelf.
Manual
Page 3 of 28
Important Safety Instructions
Caution:
Read these instructions:
Read and understand all safety and operating instructions before using the equipment.
Keep these Instructions:
The safety instructions should be kept for future reference.
Heed all Warnings:
Follow all warnings and instructions marked on the equipment or in the user information.
Avoid Attachments:
Do not use tools or attachments that are not recommended, because they may be hazardous
Warning!:
• This equipment should be operated only from the included power supply.
• To remove power from the equipment safely, remove all power cords from the rear of the equipment, or the
desktop power module (if detachable), or from the power source receptacle (wall plug).
• Power cords should be routed so that they are not likely to be stepped on or pinched by items placed upon or
against them.
• Do not defeat the safety purpose of a polarized or grounding-type plug. A polarized plug has two blades with one
wider than the other. A grounding-type plug has two blades and a third grounding prong. The wide blade or the
third prong is provided for your safety. If the provided plug does not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
• Unplug this apparatus during lightning storms or when unused for long periods of time.
• Refer all servicing to qualied service personnel. There are no user-serviceable parts inside. To prevent the risk of
shock, do not attempt to service this equipment yourself because opening or removing covers may expose you to
dangerous voltage or other hazards. Contact your local Neets reseller or distributor.
• If the equipment has slots or holes in the enclosure, these are provided to prevent overheating of sensitive
components inside. These openings must never be blocked by other objects.
• Do not use this equipment near water.
• To reduce the risk of re or electric shock, do not expose this apparatus to rain or moisture and objects lled
with liquids.
• Unplug the product before cleaning. Clean only with a dry cloth and not cleaning uid or aerosols. Such products
could enter the unit and cause damage, re, or electric shock. Some substances may also mar the nish of the
product.
FCC Class A Notice:
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
2. This device must accept any interference received, including interference that may cause undesired operation.
The Class A limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference, in which case the user will be required to correct the interference at his own expense.
FCC regulations state that any unauthorized changes or modications to this equipment, not expressly approved by
the manufacturer, could void the user’s authority to operate this equipment.
The lightning bolt triangle is used to alert the user to the presence of uninsulated “dangerous
voltages” within the unit’s chassis that may be of sufcient magnitude to constitute a risk of electric
shock to humans.
The exclamation point triangle is used to alert the user to presence of important operating and
service instructions in the literature accompanying the product.
!
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Contents
Foreword ..............................................................2
Revision list ............................................................2
What is in the box? .......................................................2
Important Safety Instructions ...............................................3
Contents ..............................................................4
Description .............................................................5
Specications - Neets Audio Amplier 2:25 ......................................6
Specications - Neets Audio Amplier 2:25 ......................................7
Installation .............................................................8
Connection and Controls ...................................................8
Front ...............................................................9
Rear................................................................10
How to connect..........................................................13
Speaker output ........................................................13
Preamplier Pre-Out connected to power amplier...............................13
RS-232 connection .......................................................14
How to use .............................................................16
Controlled from the front panel.............................................16
Controlled from the built in webserver........................................16
Controlled from LAN by remote protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Controlled from RS-232 by remote protocol ...................................17
Special functions.......................................................18
Troubleshooting ..........................................................19
Error indication ........................................................19
LAN and RS-232 protocol ..................................................20
Command structure ....................................................20
Global functions .......................................................21
Audio inpput settings ...................................................22
Audio output settings ...................................................23
I/O settings ..........................................................23
I/O control ...........................................................24
Screen settings .......................................................25
LAN settings .........................................................26
RS-232 settings.......................................................27
IR commands (Advanced users) ............................................28
Page 5 of 28
Description
Neets Audio Amplifier – 2:25 and Preamplifier is network controlled stereo audio amplifier/pream-
plifier controlled through LAN or RS-232. They adds additional RS-232 and I/O ports for expansion
and integrates with Neets and 3rd party control systems.
The USB audio input enables direct audio input and external volume control from a computer (PC
or Mac).
Audio Amplifier – 2:25 has a Class D amplifier with built-in DSP.
The Preamplifier utilizes the same DSP with balanced audio output. The Preamplifier can be pow-
ered by Power over Ethernet (PoE) or the included 12V PSU.
Audio Amplier – 2:25
• 2-channel stereo amplifier
2x25 Watts @8 ohm or 2x35 Watts @4 ohm both in stereo
• Bridge mode
1x34 Watts @8 ohm or 1x56 Watts @4 ohm both in bridge mode
Preamplier
• 1 Balanced stereo audio output
Stereo balanced or single ended line level output on terminal blocks
• Power over Ethernet
Power can be supplied through PoE
• 12V DC power in/out
When powered by PoE the 12V DC output supplies power for external devices such as control
system. When not powered by PoE the included 12V PSU can be used for power input
Both models
• USB audio
Provides audio playback and volume control on connected PC or Mac
• 1 LAN port
Enables control of the amplifier and adds two extra RS-232 ports for expansion of the
control system
• 2 Bi-directional RS-232 ports
Used for control or expanding the AV system with more devices
• 4 General Purpose I/O ports
Used for extra input/output ports for control of relays, switches and sensors.
• Input 1 Mix function
Input 1 may be set to mix with any other currently selected input.
• 3 band equalizer
Works as an active filter for bass, mid and treble
• Front LED indicators
Convenient location for easy performance indication
• Easy mounting
Can be mounted in trunking systems, hidden under shelving or in furniture, or mounted or in 1RU
using the Neets Rack Shelf
• Configuration
Built-in configuration area fully integrates with Neets Project Designer
Page 6 of 28
Specications
Neets Audio Amplier 2:25
Speaker output
Output power
Stereo 2 x 25 W @ 8 ohm
Stereo 2 x 35 W @ 4 ohm
Parallel-bridge 1 x 35 W @ 8 ohm
Parallel-bridge 1 x 35 W @ 4 ohm
Analog audio input
Unbalanced inputs 4 stereo inputs
Input impedance < 100 k Ohm
Max input level 2 Vrms
Input gain adjustable +/- 12 dB
Wake on signal Adjustable level
Connector 2 x 4 RCA female
USB audio input
Supported OS MAC OS-X
Windows XP, Vista
7,8,8.1 and 10
Bit depth 16 bit
Sample rate 48 kHz
Controls Volume, mute
Wake on signal Trigger on 5V USB
Connector USB-B female
Power input
Input voltage 24 VDC
Max power usage 50 W
Standby power usage < 3 W
Connector 5,5 mm DC plug
Power adaptor included
Input voltage 100 VAC – 240 VAC
Network (LAN)
Speed 10 / 100 Mbit
Duplex modes Half or Full
DHCP Default off
Default IP 192.168.254.252
Default gateway 192.168.254.254
Default subnet mask 255.255.255.0
Connector RJ45 with LED
RS-232 / IR ports
Ports 2 x bidirectional
Baud rate 1200 – 115200 bit/sec
Data bits 7, 8
Parity Even, Odd, None
Stop bits 1, 2
IR frequency 400 Hz to 500 KHz
Connector 2 x 3 pin screw blocks
Input/ Output
Ports 4 x I/O
Input trigger low < 1VDC
Input trigger high > 4VDC
Output type Open drain
Isolated output No
Max voltage load 24 VDC
Max current 0.5 A
Connector 5 pin screw block
General
Width 218 mm
Depth 70 mm
Height 37 mm
Width 8,58 Inches
Depth 2,76 Inches
Height 1,46 Inches
Weight 0.5 kg
Shipping weight 1.35 kg
Shipping dimensions 282 mm/ 18,8 mm/
55 mm
Storage temperature -20 °C to 50 °C
Storage moisture Non condensing
IEC/EN 61000-6-1
IEC/EN 61000-6-2
Page 7 of 28
Specications
Neets Audio Preamplier
Line output
Balanced output 1 stereo output
Output impedance 100 Ohm
Output level @ 0 dB/FS 1.3 Vrms/+4 dBu
Connector 5 pin screw block
Analog audio input
Unbalanced inputs 4 stereo inputs
Input impedance < 100 k Ohm
Max input level 2 Vrms
Input gain adjustable +/- 12 dB
Wake on signal Adjustable level
Connector 2 x 4 RCA female
USB audio input
Supported OS MAC OS-X
Windows XP, Vista
7,8,8.1 and 10
Bit depth 16 bit
Sample rate 48 kHz
Controls Volume, mute
Wake on signal Trigger on 5V USB
Connector USB-B female
Power input/ output
Input voltage 12 VDC
Max power usage 5 W
Standby power usage < 3 W
Connector 2 pin screw block
Power adaptor included
Input voltage 100 VAC – 240 VAC
Line frequency 50 Hz – 60 Hz
Max power usage Max 25 W
Connector Prong matching
country of sale
Network (LAN)
Speed 10 / 100 Mbit
Duplex modes Half or Full
DHCP Default off
Default IP 192.168.254.252
Default gateway 192.168.254.252
Default subnet mask 255.255.255.0
Connector RJ45 with LED
RS-232 / IR ports
Ports 2 x bidirectional
Baud rate 1200 – 115200 bit/sec
Data bits 7, 8
Parity Even, Odd, None
Stop bits 1, 2
IR frequency 400 Hz to 500 KHz
Connector 2 x 3 pin screw blocks
Input/ Output
Ports 4 x I/O
Input trigger low < 1VDC
Input trigger high > 4VDC
Output type Open drain
Isolated output No
Max voltage load 24 VDC
Max current 0.5 A
Connector 5 pin screw block
General
Width 218 mm
Depth 70 mm
Height 37 mm
Width 8,58 Inches
Depth 2,76 Inches
Height 1,46 Inches
Weight 0.5 kg
Shipping weight 1.25 kg
Shipping dimensions 282mm/ 18,8 mm/
55 mm
Storage temperature -20 °C to 50 °C
Storage moisture Non condensing
IEC/EN 61000-6-1
IEC/EN 61000-6-2
Approvals
IEC/EN 61000-6-1
IEC/EN 61000-6-2
Page 8 of 28
Installation
The amplier or preamplier unit is designed to be easily installed in any convenient location.
It can be placed on a desk free standing. Simply unpack the unit, mount the adhesive feet and it is
ready to go.
Alternatively, the unit can be mounted under a table, on a ceiling etc. with the included self-tap-
ping screws. Unpack the unit, place the unit on the surface where it should be mounted, and
screw the two screws through the holes in the top as shown below:
The unit also can be mounted in a 19 inch standard rack using the Neets Rack Shelf (Part number:
306-0017). See separate manual for installation instructions.
Connection and Controls
Front
Number: Description
1 USB configuration input
2 RS-232 status indication
3 IO status indication
4 Button for source selection
5 Source selection indication
6 Button for volume adjustment, down
7 Volume level indication
8 Button for volume adjustment, up
9Power and error indication
1 3 4 52 6 7 8 9
Page 9 of 28
Front USB conguration
The front panel USB connector marked “cong” is used for conguring the
amplier and updating the rmware.
A built in web server enables quick conguration using your favorite browser
on a Windows based PC, accessible when connected through the USB cong
port. For complete conguration details, please refer to “Control from the
built in webserver” on page 16.
The USB connector for connecting to the amplier is “mini USB B 5P”. You
can buy this cable on the web (select a USB A to Mini USB B 5P).
RS-232 status indication
The RS-232 status LED displays the current status of the RS-232 ports.
The LEDs illuminate when there is active communication on the port.
IO status indication
The IO status LED displays current status of the I/Os.
When an IO is congured as input, the yellow LED marked “in” will illuminate
when the input is high and turn off when the input is low. The green LED
marked “out” will remain off.
When an IO is congured as output, the green LED marked “out” will illumi-
nate when the output is high and turn off when the output is low. The yellow
LED marked “in” will remain off.
Source control and indication
The input audio source can be selected directly on the front panel with the
button marked “select”.
The LED for the selected source will illuminate yellow.
Volume control and indication
The output volume can be adjusted directly from the front using the buttons
marked “down” and “up”.
The current volume level will be indicated on the three green volume level
LEDs.
Power and error indication
The “on” LED will show the current status of the amplier.
Green The amplifier is on and running normally.
Red The amplifier is in standby mode.
Blue The amplifier is starting.
Flashing red The amplifier is in error mode, se section
“Error indication” on page 19 for details.
Page 10 of 28
Rear
Neets Audio Amplifier 2:25
Neets Audio Preamplifier
Number: Description
1 4 x stereo line level audio input
2 1 x USB audio input
3 Amplier 2:25 1 x stereo speaker level output
3 Preamplier 1 x stereo balanced line level output
4 2 x bi-directional RS-232 or IR transmitter
5 4 x digital I/O
6 Amplier – 2:25 1 x RJ-45 Network (LAN) connector
6 Preamplier 1 x RJ-45 Network (LAN) connector w. PoE
7 Amplier – 2:25 24 V DC power input
7 Preamplier 12 V DC power input or output
1 3 4 52 6 7
1 3 4 52 6 7
Line audio input
The connectors marked “Line in” are line level audio inputs. Connect your
audio sources here with an RCA cable.
White inputs are left channel, red inputs are right channel.
USB audio input
The USB audio connector is used to connect the amplier to your PC
or MAC for use as a USB audio source.
Connect using a USB A male to USB B male cable. Remember not to
exceed the maximum USB cable length of 5 meters.
Speaker output (Amplier - 2:25 only)
The loudspeakers are connected to the Speaker output using the supplied
mating Euroblock connector. The loudspeaker cables can be securely fas-
tened to the amplier by tightening the two screws built into the connector;
this is important when connecting heavier speaker cables.
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