CrystalLink Audio

CATx Extender - Audio

  • Extend stereo audio and a microphone up to 1,000 feet over a single CAT5 cable
  • Supports multimedia speakers, headphones, or earphones
  • Built-in microphone preamplifier
  • Adjustable microphone gain
  • Supports condenser or dynamic microphone inputs

Typical Application

CrystalLink Audio application


CrystalLink Audio Extender from Rose Electronics is the perfect addition to systems that require extending audio away from a PC. Headphones or multimedia speakers may be directly connected to the receiver. The receiver unit has a built-in microphone preamplifier, which allows adjustment of the microphone gain via a potentiometer on the bottom of the receiver.

Installation is straightforward.

1- Connect the transmitter's Mic Out and Line In ports to the corresponding ports on your PC or audio source using a 3.5mm male-to-male audio cable. The jacks are color coded to PC standard: connect pink to pink and green to green.

2- Connect a Microphone to the receiver's Mic Input port (pink) and a set of speakers to the Line Out port (green).

3- Connect the local unit to the remote unit with up to 1,000 feet (300 meters) of CAT5 cable.

4- Connect the power adapter to the local unit’s +9VDC power jack and a power source.

Only one power adapter is needed to power both the transmitter and receiver. The extender can transmit audio up to 1,000 feet over CAT5 cable. CrystalLink Audio Extender can be combined with Rose Electronics Audio Splitter product line to extend an audio source to several remote locations.


Dimensions (W x D x H) 0.87" x 3.62" x 1.34" (22 x 92 x 34 mm)
Weight 0.14 lbs (0.06 kgs)
Power 100-240 VAC 50-60Hz
One external adapter, +9V DC, 300ma, 2.7W
Receiver powered by transmitter
Audio Response: 10Hz to 25Khz (1Vp-p/10k )
Impedance: 10Kohm
Audio In: 1.8Vp-p
Mic In: 0.5Vp-p
Microphone gain: 0-15dB
Distance Up to 1000' (300m)
Connectors Transmitter:
Line in: 3.5mm jack
Mic out: 3.5mm jack
Link: RJ45 jack
Power: Barrel jack
Line out: 3.5mm jack
Mic in: 3.5mm jack
Link: RJ45 jack
Controls Receiver power: Green LED
Microphone gain: 0-15dB potentiometer
Environment Operating temperature: 32°F–122°F (0°C–50°C)
Storage temperature: -4°F–158°F (-20°C–70°C)
Relative humidity: 20%–80%, non-condensing

Part numbers

Product Part Number Description
ALD-KAAU2 Audio extender, complete kit. transmitter, receiver, and power adapter