Excellent used condition Harmonic technology Cyberlight Digital Datalink LAM (Light Analog Module) Photon Transducer.

Retail 3m  $2100.

Basically, Harmonic Technology's Light Analog Module (LAM) Photon Transducer is a tiny module built into the cable right at the RCA or XLR plugs. The LAM converts voltage to laser light, which is then transmitted via audio-grade glass fiber to a receiver in line with the RAC or XLR plug at the other end of the line, which converts the light back to voltage. Once the conversion to light has taken place, the light moves at, of course, the speed of light (ca 186,000 miles per second), with no resistance, capacitance, "skin effect," inductance, RFI or EMI reception, etc. You needn't worry about crossed power cords or static electricity; dressing cables to prevent induced hum or keeping them off the floor become nonissues. In fact, Harmonic Tech claims no signal loss of any kind in cable runs of up to 200 meters. And with no conductive wires between components, all potential ground loops are eliminated.

There is no digital conversion, nor is amplitude or frequency modulation involved. The process is purely analog. Because the signal is unidirectional, there is no back-reflectivity of the signal. The system bears no relationship to LED-based TosLink transmitters. Instead, true telecom/broadcast-quality analog laser technology is used at an invisible wavelength. According to Harmonic Technology, every electron that enters a Light Analog Module is converted to a photon, then back to an electron at the receiver end. The cables are available with either single-ended RCA or balanced XLR terminations. Imagine the advantages of this stuff used as balanced microphone cables.

Both sinewaves (analog) and squarewaves (digital) can be transmitted. The input/output impedance of the CyberLight Digital Datalink is 75 ohms (the balanced XLR is 110 ohms). The analog cable's input impedance is a high 30k ohms, the output impedance a low 75 ohms, thus making it component-friendly at both ends....... more information at STEREOPHILE.COM