Harmonic Technology cables are revolutionizing the high performance audio and video cable market worldwide, thanks to our amazing discovery of combining the science of metallurgy with the development of audio and video cables. Our innovative OCC Single Crystal? manufacturing process purifies metal to eliminate any potential crystalline barrier distortion. The end result reveals that Harmonic Technology cables create a dramatic increase in clarity, dynamics and power to a level never experienced before by audiophiles and home theater enthusiasts.

Product range

• CyberLight Cables
• Interconnects
• Digital Cables
• Speaker Cables
• Video Cables
• Power Cords
• Furutech Accessories

More information on Harmonic Technology products can be found on the official Harmonic Technology web site.

What it is and isn't

(Reproduced from Stereophile Magazine, written by Michael Fremer, August, 2005)

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.

The key issue is how accurately Harmonic Tech's miniature LAM Photon Transducer converts the signal to light and how effectively the receiver reconverts it. That I couldn't measure. I could go only by what I heard, though HT claims a bandwidth that's flat from 5Hz to 30MHz.

Logistics, setup, use

There are three varieties of CyberLight Wave cables: CyberLight Wave for source to preamp, CyberLight P2A for preamp to amp and source direct to amp, and CyberLight Digital Datalink for digital source to D/A converter. The standard versions accept ?2.5V signals; ?4.25V and ?6V versions are available as special orders. I used a pair of 20' P2As between my preamp and amp, and 1.5m pairs of Waves from CD player to preamp and phono preamp to preamp.

The LAMs are powered cables, so wall-wart power is standard; each set of cables comes with its own wart. Far more preferable is the Cyber Power Pack ($399), a rechargeable battery that remains plugged in at all times. Power connection is via "pigtails" that extend from near the transmitter end of each P2A and from the receiver end of each CyberLight Wave. The power source connections for both thus remain close to the source jacks.

To use the CyberLights, charge up the battery for at least 18 hours (preferably 24), then shut your system down, install the cables, and connect the power?Harmonic supplies power Y-connectors so that one line from the Power Pack can control two cables. Then switch the Pack from Charge to DC, fire up your system, and you're ready to play for up to maybe eight hours, until the Pack needs a recharge. When you're finished listening, shut off your amp and flip the Pack's switch back to Charge. The downside is that you can't leave your solid-state amp on continually. And don't ever unplug or plug in the power to the cables with the amplifier turned on or you'll send a horrendous THUMP through your system.

The most fabulous sound

If you hear what I heard, for the first time in your life you'll hear no cables whatsoever. When you switch back to any brand of metal conductors, you'll know you're hearing cables?because what's transmitted via CyberLight will be the most gloriously open, coherent, delicate, extended, transparent, pristine sound you've ever heard from your system?at least if you hear what I heard.

There was a delicacy and purity to high-frequency transients that was immediate and unmistakable. By comparison, going back to regular cables made everything sound bright or dull or spotlit or hard, depending. The CyberLights produced an effortlessness and a pulse-like coherence that was more "musical" than anything else I've experienced while listening to recorded music. The bass was ultratight and round and "right," and the harmonic balance and overall musical decay were more natural and believable than I'd ever heard from any stereo system.

The LAM technology might ? I say might ? have had a particular character or sonic signature that could be described as a slightly glassy smoothness, but I think it was just the absences of grunge and metal cables' well-known problems?the problems that all cable designers tout their cables as having eliminated. Harmonic Tech has eliminated those problems for real by eliminating the cables themselves. If there was a slight tradeoff?and I'm still not saying there was?whatever was lost was more than made up for by what the CyberLights provided.

A number of serious cable skeptics within the high-end industry have visited me in the past few months. After listening sessions in which we made many cable swaps and A/B comparisons, they came to the same conclusions I have about the clear superiority of naturally musical presentation the LAM technology provides.

Summing Up

Having spent several months with the CyberLight analog interconnects (I haven't yet checked out the Digital Datalinks): 1) I would not want to be in the business of making expensive standard cables right now; 2) Harmonic Technology's Light Analog Module Photon Transducer is the most significant single technological breakthrough I have experienced in my career as an audio reviewer. It is immediately superior in every way.

Positive Feedback Review

(As reviewed by Robert H. Levi)

Revolutionary is the only word to describe these state-of-the-art interconnects from Harmonic Technology. This first use of fiber optics and laser technology within the audio band is a winner! Your first listen to these metal-less cables will be somewhere between startling and shocking. There are two models, CyberLight P2A for use between preamplifier and amp and CyberLight Wave for use between sources and preamplifier.

After listening extensively to the CyberLights, I have not been able to discern any discernible colorations, and no sonic nasties. I hesitate to call them perfect, but I have no other cables to which I can point as an adequate reference. The CyberLights do not roll off or emphasize any frequency. They are supremely quiet, and their soundstage depth is as good as it gets. They even appear to help your amplifier work better?I'm not sure why, but clipping seems to be reduced. Conventional wire must transmit grunge that eats up amplifier power. The CyberLights simply don't create artifacts that upset your amplification, and the effect is not subtle.

There's more. The CyberLights break ground loops. They are immune from EMI and RFI. A 200-meter length of CyberLight appears to be less deleterious than a one-meter length of conventional high-end wire. I tried a three-meter length of CyberLight in a passive system, and it yielded much better sound than a one-meter length of my best wire. CyberLight sounds like it has no sound. If you own top-flight electronics, you will be astounded, I assure you.