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Post by chinook9 on Oct 21, 2013 21:16:14 GMT
Franz, thank you for checking. I wasn't sure if I had given you enough information or not. The Mouser stock numbers in the same order I listed the components above are: 871-B82144A2474J 279-LR1F56R 279-LR1F27R 810-FK26X7R2A684K 667-ECE-A1EN470U
I appreciate the time you are spending on this.
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solderdude
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Post by solderdude on Oct 21, 2013 21:25:23 GMT
These are the correct parts !
I inquired with Superlux and got this reply:
We do have a separate velvet pads of HD681 EVO, and its model no. is EPK681 EVO-V. I am not sure if Thomann already import this accessory. You may ask Thomann. If there is an requirement ,then it will speed up Thomann to import and put on the on-line store.
So the velvet pads (velour) can be ordered separately. Perhaps the USA representative may be able to supply them. They will be cheaper than the K240 pads and are IMO just as good.
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Post by chinook9 on Oct 21, 2013 21:32:22 GMT
These are the correct parts ! I inquired with Superlux and got this reply: We do have a separate velvet pads of HD681 EVO, and its model no. is EPK681 EVO-V. I am not sure if Thomann already import this accessory. You may ask Thomann. If there is an requirement ,then it will speed up Thomann to import and put on the on-line store.So the velvet pads (velour) can be ordered separately. Perhaps the USA representative may be able to supply them. They will be cheaper than the K240 pads and are IMO just as good. Great Franz! Thanks a lot. I will order the parts from Mouser tonight and then try to figure how to check with the US Superlux dealer on the velour pads. I figure that I can use my spare SRH-840 pads until I get the Superlux pads. Its not big rush. Eventually, if I have to, I will buy the whole set of EVO headphones and then resell on eBay minus the velour pads. Thank you for all your help.
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Post by madmac on Oct 23, 2013 3:37:22 GMT
I've ordered a pair in China and they are waiting for me at the post offiche now. Will report soon to verify if they are good or not.
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Post by chinook9 on Oct 23, 2013 23:34:06 GMT
Just received mine. $25 including priority mail from Russo Music in NJ. Put the SRH-840 pads on immediately and sound really good right off the bat. Burning them in while we go out for dinner. I should have components for the filter tomorrow. I plan to build the filter in a box first so that if I decide to experiment it will be easier. I also have some Chinese copies of FA-003 pads (I think) that I will try also. These are really thick like the alpha dog pads.
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Post by madmac on Oct 25, 2013 21:00:57 GMT
The Superlux earpads are in ! These are way better than the (so called) AKG pads I bought at Thomann. I don't believe the Thomann pads are genuine AKG ones. What's the difference ? - Real velours cloth instead of flocked like the Thomann earpads. - So much softer - Better finished seams - Bigger hole for over my ear - €10 instead of €17 !! - Overall a fantastic buy. When I'd put one velours on and one pleather was still on I could here a difference left and right, as if the velours takes away even more highs and mids. Softens them up acually. I don't know at this moment if I want more softening after Frans' filter has been added. But comfort and sealing improved quite a bit. Because of the better sealing bass is thighter too.
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solderdude
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Post by solderdude on Oct 25, 2013 22:30:41 GMT
I think the pads you have are e-bay pads that 'fit' the HD681 (amongst others).
Thomann sells the genuine AKG pads (100% sure, these are no fakes) and the Superlux pads (those made for the EVO) are close clones of the AKG pads they just do not have the air hole the AKG pads have also the inner diameter is much the same (smaller than the pleather pads). They also look nothing like the pads on the picture (different finish and materials) Both AKG and Superlux pads are a bit 'squeeky' when wearing glasses and these might not.
It is highly likely they are more comfortable and change the sound for the better.
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solderdude
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Post by solderdude on Oct 25, 2013 22:42:11 GMT
Just ordered these pads on fleabay. They should arrive within 2-4 weeks and will measure them..
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Post by madmac on Oct 25, 2013 23:21:29 GMT
Well, if Thomann sells the genuine I don't like them. Much too firm, they don't seem to follow the shape of your head. These earpads are almost as soft as the DT770 pads and these are real velours cloth. The others are like they did flocking on pleather. (The spray thing you mentioned somewhere).
These are from Aliexpress. Could be the same as on ebay of course, but these look exact as on the pictures. Same finishing and seams.
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Post by chinook9 on Oct 26, 2013 4:30:35 GMT
Just got my components today. I built the crossover in a small box because I couldn't wait to get it done. I'm using a spare set of SRH840 pads, and together with the filter, the improvement of the sound is substantia.....transforms the HD681s into a really nice HP.
I'm not sure if I can mount the filters inside the HP because the 47uF capacitors are quite large. I'll look at the pictures out there and see if it looks like it would fit. I'll be listening to Pink Floyd later for a more extended evaluation.
Thank you Frans.
Anyone know if changing the cable makes a noticeable difference. I say noticeable because I bet its a pain to do and I don't want to do it unless the improvement is easily noticeable.
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Rabbit
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Post by Rabbit on Oct 26, 2013 8:29:38 GMT
This is just me, Chinook. I made the most expensive mistake with a cable. I bought a very expensive one for my HD650 years ago. It was supposed to improve the headphone etc. I can honestly say, I heard no difference. The mistake cost me £180. It would have been better to have bought another headphone. The other problem was it's stiffness and the wire from the cups bashing my shoulders every time I moved my head. I soon went back to the stock. This cable was a well known one that everyone declared massive differences. What a mistake that was for me. Personally, I wouldn't change it unless the one you have is a nasty colour or microphonic. Or the wrong length. I'm changing the lead on my HD598 but only because I want one that's short with a mini plug for mobile use. Also, it's a plug fit into the headphone. At £10, that's even pushing it for me!! Just my opinion and I'm sure someone will say I'm wrong though.
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solderdude
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Post by solderdude on Oct 26, 2013 9:17:54 GMT
I won't Me too would only recable if the length wasn't as desired, the cable is microphonic or too stiff or if you have a curled one and like a straight one or vice versa. For 3 wire cables there is a measurable difference though in case the resistance of the common wire is relatively high. Most single entry headphones are 3 wire constructions. Dual entry cables are 4 wire constructions. For Sennheiser cables (HD6x0) the construction is 4 wire and the driver impedance is high. For HD681 the cable is long and a few Ohms where the driver is 32 Ohm. This might affect the stereo image. The influence on the frequency-range/distortion is negligible. I did recable my HD681 and used even crappier cable (from a Skytronics cheapy) that has more than double the amount of resistance per meter. The reason was 3 fold. The original cable was not very supple, it was quite microphonic and way too long for portable usage. So I shortened the crappy cable (so ended up with about the same resistance as the original long cable) and used that. Both are 3 wire and found there was no audible differnce BUT did get a more supple, less microphonic and shorter cable in return. Will post some measurements shortly.
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solderdude
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Post by solderdude on Oct 26, 2013 9:27:24 GMT
Well, if Thomann sells the genuine I don't like them. Much too firm, they don't seem to follow the shape of your head. These earpads are almost as soft as the DT770 pads and these are real velours cloth. The others are like they did flocking on pleather. (The spray thing you mentioned somewhere). These are from Aliexpress. Could be the same as on ebay of course, but these look exact as on the pictures. Same finishing and seams. The AKG pads are indeed stiff and not very compressable. They don't change much over the years (untill now). They are plastic with fluff sprayed on it but are more comfortable than the stock pads. I prefer Beyer and Shure velours pads but these don't fit as well (The oval Shure pads can be persuaded to 'fit'). It looks like these Chinese offerings are more Beyer alike. The question is how the used foam inside behaves over the years. My Beyer pads flattened over the years and had to replace mine on the DT990 2 times over the years.
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Post by madmac on Oct 26, 2013 13:29:30 GMT
I hear you, but at €10 I'll gladly change them every few years. I even think I'm going to order 5 pair at once just to have a stock. I like them so much that I want them on the K271 studio as well.
And they do not resemble the beyer pads, the Beyer pads have some sort of plastic surounding the cups, these have pleather for that. And the hole in the AKG pads is so small it feels like I'm wearinging on-ear headphones.
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Post by chinook9 on Oct 26, 2013 13:45:50 GMT
Rabbit and Solderdude, thanks for the information on the cable. I don't have any microphonics and the flexibity/length is fine so I'll stay with the stock cable.
After a listening for about an hour last night, I am amazed at how much I like these HP. Except for the bass they really don't stand out in any way but at the same time they don't seem to have any glaring weaknesses. Possibly the specific imagery(location of instruments)in the soundstage could be a little better but that's being really picky.
I will definitely be building a filter for the T50RPs now.
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