TECPRO Loudspeaker station LS351

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Series 2 Tecpro LS300 Loudspeaker Stations provide local monitoring of intercom circuits without the need to wear headphones. The built-in microphone makes them suitable for hands-free operation, allowing full-duplex simultaneous talk and listen conversations to take place. If required, a headset may be plugged in, disabling the internal microphone and speaker. LS300 Loudspeaker Stations offer single circuit operation as standard. Dual circuit versions are available on some models.

  • Hands-free or headset operation
  • Loudspeakers selected for clear voice reproduction
  • Built-in flush-mounted electret microphone
  • Microphone On/Off button offers push-to-talk or latching characteristics
  • Acoustic feedback cancellation preset
  • Side-tone preset for headset
  • XLR 4-pin input socket for gooseneck microphone or headset
  • Single and dual-circuit versions available on some models
  • DC and 20kHz ‘Call Alert’ signaling send and receive
  • 24kHz ‘Remote Mic Kill’ send and receive
  • 28kHz ‘Override’ signal recognition for preset volume restoration
Power requirements: 24 to 30V DC
Current consumption: Less than 175mA peak
External DC input: 24 to 30V DC (some versions only)
Current consumption: Less than 100mA peak with external PSU (some versions only)
Headphone output: 30 ohms to 4k ohms
Microphone input: 200 to 600 ohm dynamic microphones

This has an 80mm loudspeaker and an electret microphone. Construction is based around a rigid aluminium extrusion with ABS side panels. The microphone, loudspeaker and associated controls are mounted on a machined top plate.

The LS351 derives power either directly from the 24V DC Tecpro line, or from an optional external 24V PSU. A green LED indicates power is present. Connection to the intercom system is via a pair of 3-pin XLR connectors which allow the LS351 to be ‘daisy chained’ with other user stations. Dimensions: 245 x 120 x 90 (l x w x h) mm. Weight: 1150g.

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