RAMX2™ – Microphone and Auxiliary Remote Audio Mixer

Ultra low noise, Interference Resistant, SMT-based design
Proprietary Mic Impedance Acceptance Technology
Voice filters to enhance speech intelligibility
Installs in a standard outlet or electrical switch box
Sealed pots and highest quality components throughout
Daisy chain up to 3 units for 6 channels
Front Power indicator LED.
CAT 5 or shielded audio cable based installation
Easy to install – strip and insert into the provided plug connectors
Double anodized markings will not fade or wear off
Compatible with previous versions (MX120A)


Toughest Built Electronics In the Industry. 
KDM models have lasted 20 plus years in the field. They are built tough for the installation environment to provide years of service. We use solid metal plates and anodized markings that never wear off. The volume controls use conductive plastic and are sealed from outside elements. They will never oxidize and cause issues with sound quality.

Technology without custom software / programming!
The product never expires. KDM does not use any software or require product specific installation / operational training classes. When you buy KDM products you actually own it, not the installer or manufacturer.

Easy to operate, easy to install.
No operating manual is required. Simply plug in a Microphone, Cell Phone or Laptop and turn up the volume! Installation requires a screwdriver and wire strippers.

Install them anywhere and add on at anytime.
The Octasound RAMX2 can be placed anywhere in a facility and fits into a standard single gang electrical box. It’s unique daisy chain ability allows multiple units to be wired together with only one home wire run.

Hearing assist Ready
An additional constant level output provides a means to supply the RAMX2 audio to a separate Zone or Hearing assist system. When the RAMX2™ volume is adjusted it will not adjust the other zone / hearing assist system.

Microphone Input Auxiliary Input General
Gain: 50 dB ± 1 dB Gain: 17 dB (150 mv to 1.0 v) Input Impedance: Greater than 10k ohm
Response: ± 1 dB 200 Hz to 3 kHz (Voice Enhance Internal Equalizer Response) Response: ± 1 dB 40 Hz to 15 kHz Output Impedance: Designed to operate into 600 ohm balanced or unbalanced.
Noise: Greater than 70 dB S/N (Volume control at maximum position)
Greater than 75 dB S/N (Volume control at 12:00 o’clock)
Noise: Greater than 75 dB S/N Temperature Range: -20 °C to 55 °C
Distortion: Less than 0.3% at 1.0 volt output Distortion: Less than 0.3% at 1.0 volt output. Power Required: Local power via AC/DC adapter (PS-RAMX2) 12 Vdc / 30 ma.
Input Impedance: Greater than 2 k ohms for low Z mics, (50 Ohm to 600 Ohm)