I get about 5-10 SR-009 every year (wich is just a fraction of the faulty 009s). If you think the serial numbers a correlated to the ammount of units sold it's not a high number. I also never got a SR-009S. But normally the first two years new headphones are under warranty (at least in the EU)...

I always wonder about questions like that. If it's not a problem with the cable (broken cable or loose wires) it means that at least one driver is defective. Imbalance occurs in my experience only when the coating is damaged (sometimes combined with a hole in the membrane). Normally it's a dust...

Hello Andre, in my expereince you have a defective driver. Probably because of dust inside the driver wich could be the reason why you hear the "white noise". This is often due to very fastly repeated arcing. After a while this can burn holes into the membrane. I would recommend to stop using...

Hope you are right. Good luck and if you have further problems let us know.

Sorry, I meant that Stax fart. I read your post again and have some more questions. If I understood correctly the crackling appeared the first time during music playback. Then you turned your amp off and on serveral times and it stopped. And now it appears only during shut off? Can you describe...

Sounds to me like the membrane on the right side collapses to one of the stators when turning the amp off. I had this issue with very few Stax headphones (altough not while turning the amp off but as a result of pressure change inside the cup). There a serveral issues wich can cause this...

It is not my 009. It was sent to me to be repaired. And I sucessfully renewed the membranes on both sides. The damage was really bad. As there where little holes and some bigger dustparticels inside the driver I am pretty shure that the driver membrane destroyed because of dust particles that...

In this case there where a few little holes in the dustcover where dust entered th driver. The owner reported noise comming from the driver but no(!) imbalance. I opend the driver and found this. Even the other side had very tiny holes in the membrane. So I had to make new membranes for his 009...

Hello John Heng, I am glad your 009 works again. But obviously (reading your text carefully) you did not do anything to the membrane. You just did wash the dustcovers (also made of the same mylar foil) of the driver wich are protecting the driver from dustparticels and humidity. I am not shure...

My experience was the same as yours with antistatic coating before 100VoltTube said I should use Techspray Licron Crystal. I tried this and it was the only coating that worked over a long period. Every other coating failed after some hours or maximum two weeks.   The problem with the usual...

I am able to repair broken drivers of 009s and basically every other Stax headphone by recoating the drivers or make completly new drivers. But the glued Lambda drivers are a big pain to repair. In my opinion if there is a channel imbalance the coating has already failed. Dustissues do often...

Yes that was the pattern I meant!   I recall the HE60 has such isolation rubber between the drivers and the baffels (Stax Lambda headphones where glued and are now screwed to the baffle). But the HE 60 has also very weak bass imo. However I am shure that the rubber is not responsible for the...

It was said that an open area of about 40% is the goal. I read in the Sanders electrostatic coockbook that it would be good to have holes with a diameter at least twice the size of the stator thickness to avoid the helmholz-effect where some frequencys get amplyfied. For headphones I would...

Hello Steve,   in my experience that is the case if you do not coat both sides of the membrane. I nearly always have membranes sticking to one stator if the membrane is not coated on both sides (when putting the headphone on my head or pull it off my head). They sometimes do not release at all...

I used Pattex 100% 50 or 100gr in a tube: http://www.pattex.de/do-it-yourself-mit-pattex-klebstoffe-produkte-new/pattex-klebstoffe/100-percent-line/100-prozent-multi-power-keber.html I had the same problem with contact cement. It was dried before I could apply it evenly and clean up the mess...

When I heat my membranes they do not shrink. In fact they do the opposite. They expand. If I take a finished membrane glued to a spacer (or glued to my stretching frame) the resonance frequency gets lower if heated! So my understanding is it will expand by being heat treated and the effect fades...

Hello Dave,   depending on where you are from I would try the 207 spare cable from Electromod.co.uk. Its available for 40Pound plus shipping. If you are located in the US I would ask at staxusa.com if they sell spare cables for Stax Lambda headphones. They should not be more expensive as the...

Cool! Thanks for putting this list together!

Hi 100VoltTube   thanks for the tip with the Licron Crystal! It works fine! It is also less prone to dust issues. Altough it is easy to apply too much and get coating that's too thick. But I have managed to get the right thickness by using a sponge that I dip into the liquid and squeeze it...

100VoltTube   Thanks for the tip with Licron crystal!   What do you exactly mean by quadrafonic headphone? A headphone with four drivers? Why would you do that? 

Thanks Wachara, I will try your method soon.   I measured a Stax 507 driver and the result was around 2-3 giga ohm (I had to measure less than a cm to get a reading with my 2gigohm meter). Higher resistance means that the charge can't reload too fast and therefore burning the membrane should...

1) 199,886 2) 189,778 3) 178,073

Because than it has too low resistance. I checked the pure fluid before applying on the drivers by applying on a strechtched piece of mylar. Best is to have 1-2 gigaohm per cm. Without dilluting it is around 100 megaohm per cm (mesured with resistance meter and two coins one cm away from each...

I wanted to repair them as they where broken. I had to redo the membranes but the coating has has failed again (gets lower in volume on one side). The antistatic I used (Antistatik 100 mixed with isopropanol) seems to be not stable for longer than a few days. I have even tried Staticide EDP/WP...

Yes I have pics of the inside of a 009 driver. But they are not that good. I will have to open the 009 in the next weeks again. Then I try to make better pics. But close-ups with my standard objective are very tricky to do. I hope the next one will be sharper and show more details.