Welcome To Fineline Tech Pvt. Ltd. all types cctv camera one stop


Quick Enquiry

Analog audio expander

Commercial Product No. PRS-4AEX4 | Product No. F.01U.290.344

Bosch Analog audio expander

  • Four audio inputs – two selectable mic/line and two line inputs
  • Four line audio outputs
  • Eight supervised control inputs and five control outputs
  • Audio processing functions
  • Redundant network connection
  • Headphone connection and VU meter for audio monitoring


Key Specifications


Power consumption 9 W (DC)
Frequency response 20 Hz to 20 kHz (-3 dB)
Line inputs 2 x
Connectors 3-pin XLR and 2 cinch (for each line)
S/N >87 dBA at maximum level
CMRR >40 dB
Input range +6 dBV to +18 dBV (XLR)-6 dBV to +6 dBV (cinch)
Mic / line inputs 2 x
Connector 3-pin XLR and 2 cinch (for each line)
Nominal Input Level -57 dBV
S/N >62 dBA with 25 dB headroom
CMRR >55 dB at 100 Hz
Input Impedance 1360 ohm
Phantom supply 12 V ±1 V at 15 mA
Input range -7 dB to 8 dB ref nominal input level
Line outputs 4 x
Connectors XLR and 2 cinch (for each line)
Output Impedance <100 ohm
S/N >89 dBA at maximum level
Crosstalk <-85 dB