Public Talkback - Overhead Speaker

Required Parts And Tools

• Output Speaker (may be overhead or in wall mounted)
• Shure MX393 Boundary Mic
• RDL STM-1 Preamp
• F-XLR Tail
• RDL ST-VOX1
• 22/2 audio cable
• B-connectors
• Fish Tape or Glow Rods
• Electrical Tape
• Wire Stripper

Installation Instructions

Mounting the Audio

1. Decide where the STM-1 will be located, knowing the MX393 mic will need to reach it.
2. Using a stud finder, determine the best location to route the 22/2 cable
3. Cut a hole into the drywall, large enough to fit a mud ring into it securely.

   

4. Using glow rods or fish tape, pass the 22/2 behind the wall routing to the STM-1

   Note: The wires of the XLR will wire to the +, -, and ground Input on the STM-1.

5. Secure a pass through plate to the mud ring mounted for the XLR just ran
6. Using anchors and screws, mount the compressor
7. Place the MX393. Plug the mic into the F-XLR tail into input of the compressor. Plug the line to the STM-1 into the output of the compressor.

   

8. Mount the STM-1 above the ceiling
9. Wire the red to the + and black to the ground power terminals on the STM-1.
10. Cut a length of 22/2 from the STM-1 to the camera. Strip the jacket on both ends. Cut away the bare wire and plastic surround the cable inside. Strip away a small piece of the red and black jackets revealing the bare copper wire.
11. A short piece of 22/2 cable will also be needed (approx. 1 inch).
12. Strip the jacket from the cable and remove all contents keeping only the red cable.
13. On both ends of the red cable, strip off a piece of the jacket. Connect one end of the 1 inch audio cable to the +PWR terminal and connect the other end into the +PHNTM terminal.
14. Run another length of 22/2 cable from the STM-1 to the audio connectors on the back of the speaker.