Audio network connections, Control functions – PolyPlanar MRD-70 User Manual
Page 6

Poly Planar LLC 520 McCormick Dr. Glen Burnie MD. 21061 410-761-4000
www.polyplanar.com
6
Audio Network Connections
See RD-44 manual for operation details.
The Basic System consists of the MRD-70 and a control panel such as the 
Poly-Planar RD-44 shown. 
Control Functions
1
Microphone: Waterproof intercom microphone.
2
Intercom Switch: Hold down to talk. Release to hear. The intercom will 
override the music in the other zones. It will also override a muted RD-44 in 
another zone while the switch is pressed. 
The volume for each zone with an RD-44 is adjustable. While holding the 
“Mic” button (# 2) down , use the Volume knob (9) to toggle the intercom 
volume up or down. (See Volume, # 9). The Master zone intercom volume is 
set using a potentiometer on the RT-20 Router (See RT-20 Instructions)  
3
Presets: Tune to a desired AM, FM, or Satellite Radio (optional) station and 
hold the desired preset button for at least 2 seconds. The display will change 
to show which preset was programmed. 
4
Display: Allows setting of display modes. Times out after 4-6 seconds*. 
Displays available information from digital song formats. Pressing the button 
advances the display functions. 
In MP3/WMA Mode: x1 = Artist x2 = Album x3 = Folder x4 Track /Time. 
* Track/Time will remain on until Display key is pressed again or if there is a 
program change. 
 
In Satellite Radio Mode: x1 = Artist x2 = Song x3 = Category 
5
Up: Tunes Radio frequencies or changes tracks higher. Press and hold to 
manually tune or fast forward a CD track. 
