Neets Audio Amplifier - 2:25
Network Controlled Stereo Audio Amplifier (2 x 25W)
Neets Audio Amplifier – 2:25 is a network controlled stereo audio amplifier controlled through LAN or RS-232. The Audio Amplifier – 2:25 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 volume control from a computer (PC or Mac).
Class D amplifier with built-in DSP
High efficiency amplifier with high quality sound
2-channel stereo amplifier
2x25 Watts @8 ohm or 2x35 Watts @4 ohm both in stereo
1x34 Watts @8 ohm or 1x56 Watts @4 ohm both in bridge mode
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.
Auto power function
Powers on when signal is detected, and enter sleep-mode automatically after 15 minutes without signal
Input 1 Mix function
Possible to set Input 1 as an input, that mixes with the current selected input.
3 band equalizer
Works as an active filter for bass, mid and treble
LED indicators on the front
Convenient located on the front for easy performance indication
Can be mounted in trunking systems, hidden or in 1RU using the Neets Rack Shelf
Configuration is done directly using a built-in configuration area that fully integrates with Neets Project Designer
Stereo: 2 x 25 W @ 8 ohm
Stereo: 2 x 35 W @ 4 ohm
Bridge: 1 x 35 W @ 8 ohm
Bridge: 1 x 55 W @ 4 ohm
THD+N, 20 Hz - 20 kHz < 0.1 % @ 1 W
Connector: 4 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:
Windows XP, Vista, 7, 8, 8.1, 10
Bit depth: 16 bit
Sample rate: 48 kHz
Controls: Volume, mute
Wake on signal: Trigger on 5V USB
Connector: USB-B female
Input voltage: 24 VDC
Max power usage : 50 W
Standby power usage: < 3 W
Connector: 5,5 mm DC plug
Input voltage: 100 VAC – 240 VAC
Line frequency: 50 Hz – 60 Hz
Max power usage: 70 W
Connector: Cable with prong matching country of sale
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
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
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
Storage temperature: -20 °C to 50 °C
Storage moisture: Non condensing
Operation temperature: 0 °C to 30 °C
Operation moisture: Non condensing
Please remember to login for access to the latest release of Neets Project Designer. If you do not have a Neets account, please fill out the form "Get Accesss".
Q: How should I prepare the amplifier for installation?
A: Before installation it is important to update the firmware. This is done through the usb port on the front and start Project Designer. This will automatically check for latest firmware and update if needed.
Q: Does the Neets Amplifier 2:25 also support PoE?
A: No, because the power output from a PoE switch will be too low, in order to support an amplifier with a decent sound.
Q: How do I access the settings in the amplifiers?
A: Simply connect a USB to the amplifier with Project Designer running, and you will be prompted with a dialog box asking if you would like to access.
Connect a RS-232 or LAN cable in order to change the settings by sending codes to the amplifier. All codes can be found in the manual.
Q: How can I control the amplifier?
A: You can control the amplifer via RS-232, LAN, the buttons on the front and in an upcoming firmware it will be possible to control the amp with the I/O’s as well.
Q: Why is the power LED of the amplifier is blinking red?
A: The amplifier is in an error state, please refer to the manual for further trouble shooting.
Q: What can I use the second RS-232 port for?
A: When using the first port for control, the second port turns into a loop-through port where you can connect any other device, e.g. a projector or a display.
Q: is it necessary to connect 24 VDC to the amplifier in order to configure it?
A: No, configuration can be done at your desk, with only a USB cable connected to the front USB.
Q: How do I connect the amplifier if I wish to use bridge mode?
A: Connect the left side +/- with a jumper and the right side +/- with another jumper. Then connect your speakers plus terminal to the left side and the minus terminal to the right side. Also, remember to change the settings in the web menu or via the RS-232/LAN codes, and remember to save the settings! When you have done these steps, turn the amplifier OFF by removing the power and reboot.
Q: Can I operate the amplifier independently without a control system?
A: Yes, you can control the amplifier from the front mounted buttons. You need to set the power to be default ON and save the setting.
Q: Can I run the speakers in parallel, so the load lowers below the 8 ohms?
A: Yes, the amplifier is stable down to 4 ohms, so two 8 ohm speakers in parallel on each output is no problem.