NewFantasia Replacement Audio Upgrade Cable Compatible with Sennheiser HD650, HD600, HD580, HD58X, HD660S, HD660S2, Massdrop HD6XX Headphones 1.2meters/4feet

Build quality is decent as always from NewFantasia. I have been using them for my headphone re-cabling needs for a few years now and have always been very happy with their cables.The nylon sleeving keeps the cable stiff and tangle-free while still allowing full flexibility. It has the potential for microphonics against clothing among other things if you use these as mobile cables. That said it works fine for a desktop headphone amp. The 3.5mm TRS connector is beefy with great stress relief and the Sennheiser L/R connectors are as stout as they need to be. The screw-on 1/4" adapter is decently made and fits flush on the connector. This cable is plenty heavy-duty for home use with an amp.Have seen several reports of the connectors "being too soft" and bending or deforming when they are inserted. If you have to use enough insertion force to actually damage the cable, you are inserting it wrong, period. These insert easily into my HD580s and snap in and out crisply but need nowhere near enough force to damage anything. Maybe stop for a second and look at what you're doing before forcing a $400 pair of headphones to the point of damage? Just a thought.No perceptible difference in sound quality over the HD650 cable with my HD580. The 5 foot length is my main draw here as I find anything shorter way too short for my desktop amp and anything longer to be a nuisance. It's a rare length and NewFantasia makes pretty much all of their cables available in 5ft lengths. Being that they're otherwise very nice cables, that makes them a real must-buy for me. If there's an audible difference between cables at this short distance it usually means there's something wrong with one of the cables. At this level you shouldn't expect a difference. I bought this cable for functionality alone. Many report there being a clear difference between the HD600 and HD650 cables. I believe that's because some HD600 cables have an inadequacy somewhere. Either channel imbalance or an impedance issue or something. Sennheiser do not "tune" their cables. I have used many different cables in my time and have never heard a difference unless one cable had an issue. It's just copper passing electricity. Maybe some of the incredibly priced audiophile cables make a slightly noticeable difference, but nothing can really claim to be an outright improvement.This cables performs the expected function quite well. It looks good, is practical, and is decently built. Can't ask much more for the price.

Works great for my HD600's. Shorter than the originals, but I think the reason my left side was going out on originals was because I tripped over the super long cable a bunch of times yanking them off my desk. This cable seems sturdy, and less likely to get tangled up in my feet since it doesn't reach the ground anymore.

This is my first time a NewFantasia product but I figured for the price this replacement cable for the HD650 looked like something worth trying considering the reviews seemed positive for the most part. I have owned and enjoyed the HD650 for some time now and despite the fact that it comes with an excellent cable, it is a very long cable and must be adapted to 3.5mm from a 1/4 inch plug which isn’t ideal for more portable uses since the headphones can actually be driven with decent sound on most phones.The NewFantasia cable seems pretty well made. The braided portion has a nice red and black weave and feels very durable. It terminates into a nice metal 3.5mm jack with a spring to protect the end from hard bends. It also includes a screw on 3.5mm to 1/4 inch adapter. On the other side the braided cable has a metal portion at the wire split and the cables split into nice rubber cables that run to the headphones. The plugs are small but you can feel which sides face outward when plugging in although there is no way to feel or see which plug is for which side without some light. The plugs are a little smaller than the stock cable but they fit very nicely into the HD650 ports.I’m not running a very high end setup with the iPhone 7 Plus(Apple Music 256kb/s AAC Tidal Lossless), the Schiit Fulla 2 Dac/Amp, and the HD650 but I haven’t noticed any degradation in the audio quality moving to these cables from the stock. I’m sure there could be a measurable difference but to my ears the difference seems to be mostly negligible. Overall I’m satisfied with the cable and considering how it sounds and comparing the cost to some of the higher end cables, I feel that the $18 I paid is reasonable. I’ll update my review should I run into any issues but otherwise I think this is a great cable and can recommend it.

Easy replacement for my 25 years old HD535's, great deal for the price. Looks good and it's build okay, one thing I would like to see is the extra ring on the plug-jack to make the "click" once fully inserted, without it the jack is a little loose. Not the best, but at the price I'm satisfied.

I was skeptical with it not being Sennheiser’s brand, but was left very surprised. Exact same sound quality with my 660s original cable. It even snaps right in, better than the original cable. Absolutely no complaints with a very good price.

Perfect replacement for a Sennheiser HD600. It is also only a meter which works much better for carrying around a portable player. the three meter cable gets stepped on and tripped over a lot. Which is probably why I needed a replacement...