来源: HIFIMAN · 2010/12/30
How about its molecular density? A cubic foot of aluminum weighs 165lb, copper 559lb, silver 655lb and gold 1.206lb. Gold is thus 9 times heavier than aluminum. Whats more, its conductivity is lower than that of silver and copper. Audiophile bling then over rational building block? Without knowing the designers reasons, forum posters could only guess. The backdrop here is that lower moving mass plus higher magnetic field strength are the two axes along which any transducer design must travel to improve sensitivity whilst balancing those gains against diminishing bass performance.
If the gold traces added weight over the companys HE-5LE driver, wouldnt it take more powerful magnets or an even thinner diaphragm film to counteract drive requirements (here planar headphones already are more challenging than most dynamics)? Would the HE-6 be bear to drive? If so, did the world really need another infamous AKG K-1000 which preferred speaker-level power to most dedicated 6.3mm sockets? 
An earlier post by the designer did little to assuage the guessers. "The HE-6 prototype needs to see 5 to 6 watts into 60 ohms." Based on a purely resistive calculation, this would equate to an amp rated at 50wpc into 8 ohms to produce 1/10th of that into Fangs load. Many months later, German importer Sieveking Sound advised itchy forum denizens that "an upgraded magnetic structure in the drivers brought the efficiency to about the same as the HE-5 LE. You still need a good and strong headphone amplifier but no longer an amplifier designed for speakers to get the best from an HE-6. A new cable is made from monocrystalline copper which sounds notably better and also turns out to be nicely flexible. A new finish on the ear caps now is a dark metalized paint that looks very luxurious. The same is true for the caps covering the slider mechanism which now sport a silver-colored product identifier. An adapter box drives down the headphone impedance seen by a speaker amplifier to about 9 ohms. Its intended for those who dont want to purchase a dedicated headphone amp."
rmal production replaced the leatherette cladding of the prototypes ear cups with a high-gloss paint.
As to pricing concerns, Sieveking reminded people that "when the HE-5 was first being developed, Fang thought it would be priced around $900-1000 but he was able to get that down to $599 by the time it was released." On concerns about reliability and teething problems, Fang Bian laid out a very condensed company history. "There were many growing pains over the last 4 years. From 2007 to 2008, we were involved in the DIY Jade project. To make that commercial was naive. By 2009, we had made the transition from DIY to professional and released the HE-5. We set up a small workshop to build full-size headphones partly by hand in our own Chinese factory. Unfortunately we had a bad experience with the supplier of our wooden housings. By 2010, the HE-5LE had transitioned to a reliable plastic mold and we now put out a fully professional product on our own production line.
"This finished our Long March and we successfully solved most of our early problems. The HE-5LE, HE-6 and their future brethren will have different drivers but share the same reliable casing. All drivers are tested for more than one year before we release them. This naturally includes the gold drivers in the HE-6. We began our planar headphone project seven years ago. After several hundred sales of HE-5 and HE-5LE units, weve only had three warranty incidents for defective drivers."