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Koss PLUG Mods... WHOA!!! - Page 2

post #16 of 54
Thread Starter 
Quote:
Originally Posted by golgi
I'm so glad I clicked to read this thread. I just so happens that I've got a pair of the old blue plugs that I stopped listening to long ago because I didn't like the sound too much. So now I've really got nothing to lose with those so I'm definitely going to try this mod....especially since I've already got the carbon fiber tubing from my rc helis at home!! Too cool, thanks!
Anyone handy with a dremel can do this mod. if youre into RC helis this will be a piece of cake. The carbon tube I used was from a kyosho heli. Im not sure which model though.
post #17 of 54
Damn it, now I want to buy a plug, just to mod it! If I can find a convienient outlet for some type of decent tube (probably not carbon, as that seems specialized), I will have to do this. I wonder if Hobby Town would have this stuff?
post #18 of 54
Great job, Kramer!
post #19 of 54
Mod completed and well worth the time taken to do it!

I did mine slightly differently. I used a dremel to bore out the existing hole and stem to the point where it was so thin it was ready to break. Then I used some stiff heat shrink tubing and shrunk it over this. Then I applied a healthy dose of CA at the base. The tube is quite a bit larger than stock now. I also shortened it up a bit because I figured one reason that the bass may be so pronounced on the stock cans is because of the long port.

I also took a little bit of foam off the pads from some old sennheiser phones and put a small amount in the tube on the plugs.

I tried listening to it and it definitely sounded better than stock but the highs were still a bit too muffled. So I took the foam out of the tube and tried again. I prefered the sound without the foams.

Overall a very cheap and worthwhile mod. Thanks for posting about it!
post #20 of 54
Thread Starter 
Once more update...
My plugs are too low impedence load for any of my amps, so I was getting poor S/N performance and a lot of hiss during quiet music passages. This was especially true when plugging into my beloved D335 PCDP.
Mod time again....



I used small 68 ohm SMT resistors and soldered them in-line to the drver. This gives a final impedence of ~85 ohms and is a much better match for my portable amps.

Its the same thing as an impedence adapter, except doing it this way takes up much less space and is more portable.

As before.. I'm pretty sure this can be done to just about any other headphone, as long as theres room inside the enclosure.

Garrett
post #21 of 54
This looks very promising. Will try something similar with the stuff I have at home.
post #22 of 54
sweet mod, Kramer you always amaze me with your mods.
post #23 of 54
Is the new tubing's inside diameter wider than the original? Was wondering if the base acts like a Shure E2C washer in a way. Can't seem to simply find "The Plugs", only the newer Sparkplugs...hmmm

*edit* Oops...did a closer reading, sorry! Found the plugs...I'm so disapointed...I forgot to look on Amazon...silly me

Question 1: Where could I purchase the SMT resistors?

Question 2: I have heard when covering the holes, it makes it less bassy? Is that true?

Hmm...I think I'll buy two pairs...I want to recable it with some CAT5 i have laying around...haha
post #24 of 54
Quote:
Originally Posted by Meloncoly View Post
Hmm...I think I'll buy two pairs...I want to recable it with some CAT5 i have laying around...haha
OMG those will be some thick phone cables going to the PLUGS. CAT5 is like 1/4" thick
post #25 of 54
I might get lazy to do so much work with CAT5, so I would prob buy one of those mini-mini cables (gold series) from ratshack and cut it haha, there's already a plug on it! saves me some work haha. Plus I have only recabled something once, so easier is always better, less chance to screw up haha
post #26 of 54
Thread Starter 
Quote:
Originally Posted by Meloncoly View Post
Is the new tubing's inside diameter wider than the original? Was wondering if the base acts like a Shure E2C washer in a way. Can't seem to simply find "The Plugs", only the newer Sparkplugs...hmmm

*edit* Oops...did a closer reading, sorry! Found the plugs...I'm so disapointed...I forgot to look on Amazon...silly me

Question 1: Where could I purchase the SMT resistors?

Question 2: I have heard when covering the holes, it makes it less bassy? Is that true?

Hmm...I think I'll buy two pairs...I want to recable it with some CAT5 i have laying around...haha
Yeah, the modded sound tube is about double the stock diameter opening. So the base can act like an e2c washer. I used a dremel to grind it down and smooth it over... see the pics.

you can get SMT resistors at most electronics parts places, digikey, mouser, Frys..etc...

Yes, covering the holes in the center of the drivers tames the bass. With the holes uncovered the bass is out of control and completely overwhelms the sound. I can't recommend it.
post #27 of 54
Man, I just happen to have a pair of Plugs with one broken tube. Thanks.
post #28 of 54
Oh Kramer, another question if you don't mind, how does the modded plugs compare to modded marshmallows? ^_^ THE BATTLE BEGINS!! XD
post #29 of 54
Quote:
Originally Posted by Meloncoly View Post
Oh Kramer, another question if you don't mind, how does the modded plugs compare to modded marshmallows? ^_^ THE BATTLE BEGINS!! XD
I would like to know too
post #30 of 54
Great stuff Garrett.

Much thanks for the pictures and explanations.
2x's (tup)
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