October 2007 Rebate - $50.00 rebate on the Proline 650 Headphones!
Rebate form here

Model Comparison

NOTES

1 -MAP is the lowest price we can advertise. Actual sales prices may differ.

2- All Proline headsets include 2 cables - 1 straight, and one coiled. In addition, they include a replacement set of ear pad cusions, a demo CD and carry bag.

3- HFI 2200ULE includes one detachable cable

4- The Proline 500 includes 2 cables - 1 straight with volme control and stereo / mono switch, and one coiled.

S-Logic Technology

The patented S-Logic technology is described as Natural Surround Sound System. Every conventional headphone on the market uses centralized drivers that send the audio signal directly down the ear canal straight to the eardrum, bypassing the pinna, or outer ear, which gives us our perception of distance and direction. The patented ULTRASONE S-Logic™ technology uses decentralized drivers. They are actually shifted slightly down and to the front so that the audio signal strikes the pinna and allows the anatomy of the ear to process the sound naturally. In addition to having much more natural sound imaging (UTRASONE headphones actually sound more like being in the sweet spot of fine monitor speakers than headphones) you get the same perceived volume with up to 40% less sound pressure level (3-4 dB)to the eardrum, virtually eliminating fatigue. By reducing EMF radiation and lowered sound pressure levels ULTRASONE are not only the best sounding headphones in the World but also the safest.

Proline /ULE

PROline stands for Ultra Low Emission (ULE) and offers a reduction up to 98% by using MU Metal. PROline also means significant benefits for professional users as it is highly-developed and specially designed for professionals.

ULTRASONE´s PROline technology (ULE) offers the lowest radiation of low frequency fields. Medical research has shown that magnetic field emissions can be hazardous to your health. The average magnetic field emission of headphones (without LE or ULE) is more than four times the maximum recommended levels. As ULTRASONE´s philosophy is not only based on perfect sound but also on protecting your health we managed to develop a revolutionary MU-metal-shielding method. This patented and certified PROline technology can significantly reduce risky magnetic field emissions up to 98%

In order to protect health of people working within an electrically surrounded environment, clear limits about the maximum radiation emissions have been occasionally defined. For example in the TCO '99 for the allowed magnetic emission of computer screens, in a distance of 30 cm, a maximum of 200 nT (nanoteslas) is the upper recommended limit.

Recommendations for the low-frequency magnetic emissions in case of headsets and headphones are still pending or are not really in the focus of importance yet. This is quite surprising as every user is carrying this very emissive equipment directly on his head! Nevertheless, we note a rapidly increasing demand for shielded headphones and headsets.

Within a research of 60 current headsets (1999 - 2000) ULTRASONE found out, that the average magnetic field emission of headsets is more than 1000 nT with a peak maximum of 2100 nT - on average. This is more than four times the maximum, recommended for computer screens in TCO '99;in irresponsible cases even more than ten times the maximum!

The developed and patented PROline technology from ULTRASONE brings magnetic field emissions of headsets and headphones down to less than 90 nT.!