Harmonic Technology's Pro-9 Reference (available as a mono speaker wire, internal bi-wire orexternal bi-wire) is an improvement of our award-winning Pro-9 Plus speaker cable. In a variety of lengths and terminations, the Pro-9 Reference will accommodate any of your speaker cable needs.

The Pro-9 Reference is HT's finest copper speaker cable. It uses the highest quality materials and a unique Balanced Field Geometry, which ensures optimal signal-transfer, and greatly reduces inductance and capacitance for extremely accurate sound. Manufactured with 9 AWG wire that consists of the highest purity 6N copper available (99.9997%) and our world-renowned Single Crystal design, this speaker cable virtually eliminates all distortion and coloration. In addition, the Pro-9 Reference uses air-tube technology to separate the conductors within the cable to dispense with any potential cross-talk. Harmonic Technology's Pro-9 Reference is the best speaker cable available for large speakers and/or exceptionally powerful amplifiers.

The Pro-9 Reference yields tight yet dynamic bass. The midrange is exceptionally rich, with tremendous detail and harmonic completeness that borders on realism. The highs are very smooth and detailed, without the artificial "zing" that you may have experienced with other speaker cables. Harmonic Technology has delivered a speaker cable that allows the soundstage to bloom as large as your room; a holographic depth and roundness you simply must experience. The Pro-9 Reference will easily outperform your existing speaker cables and transform the sound of your system.

HT has developed two distinct types of the Pro-9 Reference bi-wired speaker cable in order to accommodate your varying needs and configurations. The Pro-9 internal bi-wire is similar to our previous Pro-9 Plus speaker cable, but it contains a separate woofer and tweeter set within one jacket. This configuration implements two connectors at the amp end and four at the speaker end.

The Pro-9 Reference external bi-wire provides a unique design, where two separate runs of cable are merged at the amp end. This type of configuration is ideal for situations where your speaker has a larger than average distance between the woofer and the tweeter binding posts. As with the internal bi-wire, there are two connectors at the amp end, four at the speaker end.

Harmonic Technology Pro-9 Reference Technical Data

Capacitance per foot: 47pF

Inductance per foot: 0.42uH

Resistance per foot: 0.002 ohm