[16-542-104] 1 x 4 Unbalanced Mono Audio DA, W/loop thru Input, Ind Unity Gain


The FlexPwr Brick™ is designed to function properly with an input power of 10-28VAC (ungrounded) or 12-32V DC (grounded or ungrounded). A 2-pin header (Phoenix Contact #1881448)style connector is used for the power input. The 12VAC, 600mA wall transformer provided with the product provides a floating power source that has been designed to eliminate any ground loops through the power supply connection. The input for this product consists of a loop-thru input with two RCA/Terminal Block connectors. An audio signal with excessive DC component (or offset) will cause the VAC Brick to malfunction. The audio signal needs to be within -4V to +4V. The VAC Brick has two audio outputs consisting of RCA/Terminal Block connectors. Unused outputs do not need to be terminated for proper operation of the Brick.

Please contact VAC for Pricing


  • Balanced mono audio distribution amplifier
  • RCA connectors
  • Unity gain
  • Loop-thru input, four active outputs


# Channels1
Input 1 Signal TypeUnbalanced Audio
Input 1 CouplingDC
Input Configuration 1Standard 10K Ohms
Gain ConfigurationUnity
Input 1 ConnectorRCA
Output 1 Signal FormatUnbalanced Audio
Output 1 CouplingDC
Output Configuration1Standard 10K Ohms
Output 1 ConnectorsRCA
Power Connector2 Pin 2.5mm TB
Input Voltage 110-28 VAC
Input Voltage 212-32 VDC
Low Operating Temp (C)-40
High Operating Temp (C)80
Power BypassNO
MountingTwo 6-32 Inserts



Power Supply

This unit has a non-isolated internal switcher power supply (FlexPWR). The unit will operate correctly on 10-28 VAC or 10-32 VDC. The power input is protected so power can be applied in either polarity. The supply provides the internal electronics with power with the ground of the video circuits being the same as the input power ground. The power connector is a 2-pin 2.5mm terminal block with detent retention that can support high vibration environments.


The package for this unit consists of a solid epoxy block. The internal electronics are assembled and tested before the encapsulation process. During the encapsulation the printed circuit board(s) are placed in a five sided box made of RTV mold parts. The cavity is filled with epoxy and the lid (top) of the mold is inserted. The curing process takes 24 hours. This type of package seals the electronics so water and contamination cannot affect the internal electronics. This type of package also provides superior resistance to shock and vibration compared to a metal or plastic box enclosure.