Used headphones
Time to split up the special’s page into two so one for headphones and another one for electronics. Here I’ll list my used electrostatic headphones, either they were a part of my personal collection or were a part of some lot I bought and refurbished before listing. Feel free to contact me at spritzer@mjolnir-audio.com if you are interested in any item here. I will reply to every mail so if you haven’t received a reply within 24 hours then feel free to send me another email. Email gets lost all the time or is flagged as spam. All prices in US dollars (USD).
Just a quick note about the used headphones. With all electrostatic phones it is possible that they have developed squealing as debris enters the drivers with age. This is something I actively look for and will put in the description (which most sellers would never do) but I might miss some as it can be so subtle. Most of the time this is a minor issue and only comes into play when nothing is playing or on very quiet passages but it’s something I mention if I come across is. Most of the Stax drivers are glued shut so they can’t be cleaned once this has come up. Also, the headphone stands the phones sit on, are not included.
Here we have a close to mint Stax SR-007Mk1, a sought after 71*** unit. These are all original and feel pretty much like new. Maybe the earpads are a little bit softer than new but still close to perfect.
To me these are the best headphones ever made and the ultimate reference. I had these as a part of my own reserve of 007Mk1’s but I don’t need to that that many in storage. This set comes with the original outer box and flight case.
Price: 3250$ plus shipping
Here we have a set of Stax SR-009’s. I’ve performed some small mods on them to increase the seal and thus the bass output. Not a major change but worthwhile as it helps fill out the sound a bit more.
Overall they are in good condition, some small marks here and there but nothing major. The earpads are original but nice and soft and I cleaned and treated the leather. They come with the original box and outer box too.
Price: 1850$ plus shipping
This is a really rather nice set of Stax SR-307’s that come with the original box. In terms of sound, these are very similar to the SR-407 (same drivers are used) and a more neutral sound compared to the older 303’s. Excellent bass for a Lambda series set and overall very enjoyable headphones.
Price: 375$ plus shipping
Stax SR-Lambda normal bias set, pretty early production at the #4600 range and in very nice condition. The SR-Lambda is one of the best headphones Stax ever made, they are a bit rolled off at the top end but the midrange and sound stage is one of the best there is. Warm sounding and very pleasant.
This set is in excellent condition for a close to 50 year old set, the foam has started to break down inside the earcups but it has no effect on performance so I just left it alone. The earpads are good condition too but the foam there is long gone as is usual. These do come with the original box which is rather rare.
Price: 675$ plus shipping
The legendary Beyerdynamic ET-1000, on of the best headphones of this generation. Great sounding units when properly driven and surprisingly comfortable. These require a bias voltage of 180V but they work just fine off Stax normal bias outputs. An adapter to do just that is included with the headphones.
They are in good condition, save one mark at the top end of the headband cover. The earpads are nice and soft and they charge up instantly and sound perfectly balanced.
Price: 700$ plus shipping
This is a nice set of SR-202’s that are all original except the foam inside the earpads had disintegrated with age. To remedy that I fitted my own inserts that I’ve been tinkering with. The budget Stax sets are often overlooked but I value them highly, they have a slightly more raw sound compared to the more senior models, not quite as refined but that works with a huge range of music. This set is in lovely condition and comes with the stock box.
Price: 335$ plus shipping
This is a Stax SR-202 and it is in fine condition, all the foam inside the housings is intact but the foam over the driver face had crumbled away. I cleared off the rest of it and fitted my own dust covers there for a nicer look. The 202’s sound closer to the older Stax Lambda Pro’s in many ways and I do enjoy them quite a bit. Very fast and honest sounding.
Price: 265$ plus shipping
Here is a very early Stax SR-404 in excellent condition. It has the same drivers as were used in the 404LE later on and it is all original except the foam inside the earpads had crumbled away. I fitted my own replacement cloth there as can be seen on the second picture.
Price: 425$ plus shipping
Here is a mint set of SR-L300’s for sale. I got these by mistake really as I wanted to add the L300 to my collection and accidentally bought two of them. 🙂 These come with the original box and they look good as new.
Price: 350$ plus shipping
Here is a stock Stax SR-L300 in mint condition. These have now been superseded by the SR-X1 but L300’s are a much more comfortable set of headphones and have a much larger soundstage. They come with the box as pictured.
Price: 380$ plus shipping
A set of SR-303’s in nice condition and all original. This is the later production version with silver protection screens for the drivers. Stock earpads and headpad in place though the foam inside the earpads has disintegrated as they all do at this point. Very nice set of headphones that would have been a shame to break up to upgrade some Sigma’s.
Price: 375$ plus shipping
A Stax SR-407, the last of the old school Lambda models. It adds a bit more bite to the sound compared to the SR-404 it supersedes with a bit more bass and usable output. This set is in very nice, all original condition and but sadly no original box with them.
Price: 550$ plus shipping
The very nice Stax SR-507, top of the line model from the *07 range and a rather rare unit at that. This set is in great condition, some slight marks here and there but earpads are close to perfect and they sound great. No original box with these.
Price: 650$ plus shipping
This is a late production SR-404, all original with the box as well. The foam inside the earpads has deteriorated so I just cleaned it all out as it does nothing anyway. Not sure what else can be said about the 404’s, they were very misunderstood back in the day but have gained a solid classic status at this point. A good set with a powerful amp can show what the Lambda was capable off well into the 2000’s.
Price: 550$ plus shipping
Here is something very, very rare. In my 20 years of collecting Stax, I’ve only ever seen five of these come up for sale and I’ve bought 4 of them. What we have here is a Stax SR-Lambda Pro with no Stax badges at all, marked Head-Acoustics instead. In fact the only Stax logo at all was on the box as these shipped in a standard Stax Lambda box, completely unmarked except for the unique “HA” serial number. Just the Stax embossed into the Styrofoam. I have no idea how many of these were made, this is the highest serial number of my collection, HA 543 so at least that many.
As can be seen, these don’t have a regular Stax plug but a 5 pin Lemo unit instead. They will come with a custom adapter though so you can use them on any standard Stax amps. In terms of sound, this is a standard Lambda Pro, but it just looks so weird without the Stax markings. No box with these.
Price: 600$ plus shipping
This is a clean and tidy set of SR-303’s. The foam inside the earcups and covering the drivers had degraded so I cleaned it out but otherwise they look great and sound even better. Comes with the original box as well
Price: 350$ plus shipping
A completely stock SR-L300 in very nice condition. I’ve always been meaning to do some projects with these so I keep buying them but alas, nothing has come of it yet. This set is close to new in condition and comes with the original box as well.
Price: 295$ plus shipping
Updated 02.11.2026