Massdrop x Koss ESP/95X Electrostatic System
Massdrop x Koss ESP/95X Electrostatic System
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Product Description
A revival of the standard-setting ESP/950 released by Koss in 1990, these headphones bring electrostatic quality into a whole new price bracket. Initially designed for live recording, the ESP/950 came with a large carrying case and a battery pack to power the required energizer: a special amplifier for electrostatic drivers ... Read More

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CEE_TEE
3109
Collaborations
Sep 14, 2018
Stickied
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Today we’re excited to announce a new collaboration with Koss based on the iconic ESP/950 electrostatic headphone system.  
Koss released the ESP/950 in 1990 to rave reviews, and it was widely recognized as the best headphone system in the world. Koss has continually produced the ESP/950 from launch until now, but as time went on, the community demanded more low-end performance in headphones, and competition developed around the $1000 pricepoint. As a result, the ESP/950 fell out of Audiophile community focus.
Now, almost 30 years later, we’re working with Koss to deliver the ESP/95X, an updated ESP/950 with deep low-end and at an accessible $499.99 for the entire system. We updated the earpads to improve comfort, which also smoothed out the low-end & upper-mids frequency response (as you can see in the graphs on the drop page). Soundstage has increased slightly as well. Removal of some vestigial accessories allows this accessible pricepoint.
Out of thin air… Why should you care about electrostatic headphone systems? -Speed and resolution. -Low distortion and low coloration.
Electrostatic forces move an entire membrane to produce sound without any physical contact or interference by parts required in other types of drivers. The driver is ultra-thin with extremely low mass so it moves very quickly/easily. This leads to a level of resolution and space between sounds that delivers more information to the ear which can be perceived by the brain. Electrostats are the endgame for most detail addicts.
The membranes are lighter than air and store no extra energy when they move. This leads to low distortion and less sonic coloration than other types of drivers. Much of your music is captured by microphones using similar technology, but in reverse.  Sound produces waves in the air which move sensitive electret membranes to generate small electric signals that we record.
COMFORT The overall headphone is super lightweight and comfortable due to the drivers, cups, and headband.  For many people who find regular headphones to be bulky and uncomfortable, the ESP/95X will be a load lifted off of your shoulders.
“DD” vs. “e-stat” The popular headphone battle seemed to be won by dynamic drivers since regular amplifiers are much more common than the high voltage “energizers” needed by electrostatic drivers.  But is the battle over? Many people enjoying “Summit-fi” (owning the most expensive or end-game rigs) enjoy “e-stats”. Adding an iconic electrostatic headphone system from such an important brand makes this a very special day that we have been working towards for a long time. The Massdrop Audiophile & Collaborations Team (Will Bright, Matt Takaichi, Michael Billeci, Thomas Fernandez, & myself) would like to thank Michael J. Koss, Chairman & CEO of Koss, John Koss Jr., Vice President of Sales, and  Michael J. Koss Jr., Vice President of Marketing & Product. Michael Koss (CEO) was involved in the original development of the ESP/950 in 1990 and all three of the family members have been instrumental in our partnership to bring you the ESP/95X.  
Sep 14, 2018
ukmichaeldavid
53
Mar 7, 2019
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Thanks I jumped on it. !!
Mar 7, 2019
Martinmoore
19
Mar 7, 2019
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Take my money!
Mar 7, 2019
bootynugget
19
Jul 19, 2019
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Just got these in the mail... and HOLY CRAP. I've heard a TON of headphones (HD6xx, E-Mu Teaks, Fostex TH900, Beyer DT880, and the list goes on.) These are BY FAR the best sounding headphones I've ever heard. There is no comparison... Hats off to Koss for making these happen at $500. Absolutely the best $500 I've spent on audio equipment.
Jul 19, 2019
LifelongCaboose
181
Jul 15, 2019
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For the price these just look absolutely incredible. Ill have to get them in at some point.
Jul 15, 2019
Sujay Rao
70
Jul 14, 2019
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Hi, I just joined a Koss 95X Electrostatic drop. The original from Koss has a battery in the energiser. I would like to know if I can run the Massdrop version on a rechargeable portable power bank ? There are some pretty powerful portable units available in the market these days. What should the battery specs be?
Jul 14, 2019
adeadcrab
15
Jul 19, 2019
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Any power supply needs to supply at least 1 amp, and only 9 volts. Switching power supplies such as wall warts, linear power supplies or even laptop batteries have all been used by owners of the ESP/95X.
Jul 19, 2019
Sherv
108
Jul 13, 2019
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Stupid question but my brain has ocd... 120v for USA since USA is 120 volt compared to 220 for Europe. Correct?
Jul 13, 2019
LukasM
753
Commerce
Jul 13, 2019
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You got it.
Jul 13, 2019
Teww
1
Jun 28, 2019
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Out of stock. Is it coming back soon? 4k requests seem like a lot.
Jun 28, 2019
LukasM
753
Commerce
Jul 13, 2019
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We're back in stock now!
Jul 13, 2019
Teww
1
Jul 14, 2019
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Unfortunately I can't get it now. But I'm sure you made lots of other people very happy :)
Jul 14, 2019
loadexfa
191
Jun 25, 2019
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Has anyone purchased a case for these? Just for the headphones. I'm interested in what has worked for others before experimenting on my own.
Jun 25, 2019
mkossjr
75
Koss
Jun 28, 2019
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Jun 28, 2019
loadexfa
191
Jun 28, 2019
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Gotcha, thanks!
Jun 28, 2019
Selfish_Android
110
Jun 22, 2019
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So when are these coming back? will they come back?
Jun 22, 2019
LukasM
753
Commerce
Jul 13, 2019
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We're back now!
Jul 13, 2019
Selfish_Android
110
Jul 14, 2019
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Thanks!
Jul 14, 2019
adeadcrab
15
May 31, 2019
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out of stock?
May 31, 2019
LukasM
753
Commerce
Jul 13, 2019
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We're back in stock now!
Jul 13, 2019
adeadcrab
15
Jul 14, 2019
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better start writing my review!
Jul 14, 2019
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