[krikor]

Use code Summer30 when checking out.  Love my PortaPro headphones for listening at work.

Unfortunately - IL200w KTC, IL200k KTC, Porta Pro, Porta Pro KTC, ProDJ200 KTC and STRIVA PRO are not eligible for promo.

[JohnR]

Does that apply to all products?

Somebody should get a pair of these and report 

  http://www.koss.com/en/products/headphones/full_size_headphones/ESP950__ESP950_Electrostatic_Headphone

[J-Pak]

Does that apply to all products?

Somebody should get a pair of these and report 

  http://www.koss.com/en/products/headphones/full_size_headphones/ESP950__ESP950_Electrostatic_Headphone

I have owned them before, MSRP used to be $650.

They are very good headphones for the price, but many people (including myself) experience squealing on the headphones after some time. Koss will replace both the amp and headphones for free, you only pay $6 for the return shipping. Unfortunately my second pair eventually developed the squeal as well.   

I did prefer my Stax Omega 2 headphones to them, but even used those Stax were 5x more than what I paid for the Koss used.

[krikor]

Does that apply to all products?

Somebody should get a pair of these and report 

  http://www.koss.com/en/products/headphones/full_size_headphones/ESP950__ESP950_Electrostatic_Headphone

Just go to checkout and punch in the code... if it doesn't show the lower price then it doesn't apply.

I owned a pair of ESP-950 for quite some time.  Good sounding cans but can be a little finicky, especially for that price.  Build quality is not what you'd expect for the cost, but then you are getting an amp as part of the package.  Never had a squealing problem, but I did develop a volume/tracking issue between channels. Had them in storage for awhile and I think the pot developed a dead spot.  Sent them back and Koss replaced the amp and while at it did an overhaul on the cans (pads, grille, etc.) under their no-questions lifetime warranty.  That may be worth the price right there.  They've been on the market forever, bought mine over a decade ago.

All that said, I sold mine about a year ago to invest in some Beyer DT990-600, Senn HD-650 and headphone amps.  While the Koss ESP-950 has an incredibly clear, open sound that is utterly effortless and a joy to listen to, they are seriously lacking when it comes to bass both in terms of definition/detail and quantity.  I've never looked back other than in terms of nostalgia every time I see a photo of a set (just kind of cool to have... but I'll take the $500 I sold them for).

Also, although they are very comfortable, I found the letherette pads to get overly warm and would even make my head sweat.