the Quad ESL uses the clampboard as shown in this picture to protect the treble panel.

these drivers look like the old Beyerdynamic 880DT with the protection circuit. it makes sense in pro-use with musicians in dynamic drivers.

no issues at all, works flawlessly for years

I use the ET1000 with a Stax Amp and it works fine. In fact it is better than the original Beyerdynamic N1000.

Yes, no tensoin before mounting, just without wrinkles but without tension - the construction does the tensioning itself.

Yes I fixed these some time ago. The result is very good. The tension is done with the ridge/rim clamping of the holder and that is what I wanted to tell before. The MS2 are very special to restore.

yes, sorry, I forgot to save

hi Wachara, these are the parts that we discuss: (one picture in the original state, one restored)

I did try it the same way once and was disapointed too - it seems that the clamping of the membrane is important for the sound. and another hint: if the mylar is too thin this mechanism does not work as it should in these phones. I like it best with 6uM Mylar. Atb, Markus

Hi Steve, these ms2's tension the diaphragma, they clamp the diaphragm with a groove and a ridge in the holder. You have to glue it without any tension, just without wrinkles. Atb, Markus

Thanks a lot for your fast answer! I would have to pay 28 Pounds for delivery, so I will wait till I need additional parts and place the order. Atb, Markus

what cable did you intend to use? I ask, because I would need a new cable and did not find anything adaequate in Austria. I have the pins already (taken from xlr plugs) but I need the cable. Markus PS: Koss delivers not to Austria, the Koss extension cable would be my first choice.

Hi, there is at least one other option with the bias on the stator (one stator and 2 diaphragm's) shown in this page: http://www.resmayerling.be/electronica/headphone.html it allows the use of aluminized mylar and seems pretty easy to construct. I would be curious how it works.

Quote: and what does this tell us about response plots? :-)   btw, I would like to take some measurements myself but I miss the necessary equipment.

Quote: there seem to be wide variations in the HP50 series: my HP50A bring the 30Hz with ease.

Quote: Hi Drakkard, the pictures in this thread are amazing! We need a new word for this, like extremodding :-)

Quote: I combine a self adhesive soft-pvc stripe (sliced over the whole lenght except the two ends) with leather and rebuild the original one like these pictures show:   the soft-pvc stripe is originally for sealing doors to the floor:

Quote: If you like to do some extra work you can make one dipol out of two tweeters: take the magnet with the holes from one and put it into the other one instead of the solid magnet. I have done it and like the result very much - but there is the compromise, that the bass is much weaker...

update to the HP-1 mods: new earpads made of fine goatskin with visco foam: made the hole smaller than the original (for comparison on the left side of the picture) and got a better seal to the ears and the sound is more involving and direct - like it very much!

sorry for a dumb question - therefore even more offtopic - but what is the advantage to the devices that had a hype 5 years ago, from murato for example?  

I would not mind any variations in the acoustic front in the mm region, because the wavelenght of 20kHz is 1.7cm. As long as there is no disturbance or any obstacle to the free flow this should have a neglectible influence.

hi nsgarch, the mod, that you can find as Tomek's guide #2 to YH-100 modification on wikiphonia gave me some ideas. The yh/hp-1 has similar "problems": there is not much space behind the driver and in the center of the back there is a nasty metal part (for the joint). but before going that...

Quote: just came across this info: http://www.audiocircuit.com/Home-Audio/Sansui/SSL-3 same name but different look? 40mm dynamic driver with 60 ohms, 500mW   on a second look there is a different name: L3 versus L33 maybe the same name scheme as with the L5 and L55?

I have a question to all of you, who have some SFI experience: does it make sense to make a driver out of three SFI's - 2 of the 8 ohm tweeters, respective their magnets with the holes, plus the diaphragma of the 32 ohm dipole? The reason that I ask is that the 8 ohm 2 in 1 SFI that I made...

I like to have two similar headphones, before I start any kind of modding: it is a similar aproach to the statement of vid, because the aim of keeping control of the changes you made is really important to avoid going round in circles. The development of a satisfying damping strategy with the...