Audio Mixer


Neets Audio Preamplifier is a network controlled audio preamplifier controlled through LAN or RS-232.

The Preamplifier adds additional RS-232 and I/O ports for expansion of the AV system 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). The Preamplifier can be powered by Power over Ethernet or the included 12V PSU.



Product Description

  • 4 unbalanced stereo inputs
    Unbalanced stereo audio input for line input on RCA connectors

  • 1 Balanced stereo audio output
    Stereo balanced or single ended line level output on terminal blocks

  • USB audio
    Provides audio playback and volume control on connected PC or Mac

  • Power over Ethernet
    Power can be supplied through PoE

  • 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. The I/O ports can also be used for direct control of basic functions of the preamplifier

  • Auto power function
    Powers on when signal is detected, and enter sleep-mode automatically after 15 minutes without signal

  • 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

  • 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

  • Easy mounting
    Can be mounted in trunking systems, hidden or in 1RU using the Neets Rack Shelf

  • Configuration
    Configuration takes place via USB or LAN using a built-in configuration area that fully integrates with Neets Project Designer


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
Power over Ethernet:
Compliance: 802.3af / 802.3at
802.3af mode: A + B
PD Class: 2
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
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
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
Width: 218 mm
Depth: 70 mm
Height: 37 mm

Width: 8,58 Inches
Depth: 2,76 Inches
Height: 1,46 Inches
USB audio input:
Supported OS:
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
Network (LAN):
Speed: 10 / 100 Mbit
Duplex modes: Half or Full
DHCP: Default off
Default IP:
Default gateway:
Default subnet mask:
Connector : RJ45 with LED
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

Power input/output:
Input/output voltage: 12 VDC
Max power usage : 5 W
Standby power usage: < 3 W
Connector: 2 pin screw block
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
IEC/EN 61000-6-1
IEC/EN 61000-6-2