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SR60-Mod - Page 173  

post #2581 of 5003
Quote:
Originally Posted by Melvins View Post

ohhh. Gotcha. You must have touched the driver, or something must be stuck in the shell it sounds like. 



Well, that's what I thought, but how do I correct it? I can't see anything wrong, I gently blew some air across the front and back of the driver to try to knock anything out, but why would that cause the headphone to just up and quit?

To be fair, this distortion is only at loud volumes with very low, punchy bass. I'd think it was my source or something else, but since the other headphone sounds perfect, I'm sure it has to do with that specific headphone.

post #2582 of 5003

Hmmm, again are you running it out of an amp as well?

post #2583 of 5003

Yeah, a Fiio E5. I charged it to full. I can only make get the bass distorted with the amp, on higher volumes than I could get without it. However, the fact that the speaker went out until I tapped it tells me it's not the amp.

post #2584 of 5003

unchain--what kind of amp/dac are you getting E7/E9 combo? I'm thinking about that combo right now for my desk, using it with my laptop and for a test setup when I make mods. Let me know if you get that rig ok..I'd love to hear what real world sound is like from them?

post #2585 of 5003

If you're looking for a solid state amp/dac, have you considered the audio-gd nfb-12 ? It's supposed to match well with Grados.
 

Quote:
Originally Posted by eclein View Post

unchain--what kind of amp/dac are you getting E7/E9 combo? I'm thinking about that combo right now for my desk, using it with my laptop and for a test setup when I make mods. Let me know if you get that rig ok..I'd love to hear what real world sound is like from them?



 

post #2586 of 5003

 

Quote:
Originally Posted by lawrywild View Post

If you're looking for a solid state amp/dac, have you considered the audio-gd nfb-12 ? It's supposed to match well with Grados.

I'll second the Audio GD recommendation. I have a B version Sparrow and really like it. Some of you might be interested in these comments from Cee Tee in the Sparrow thread.

post #2587 of 5003

I'm actually getting the Matrix Cube, found here: (http://coolfungadget.com/store/index.php?route=product/product&product_id=56)

It looks really great, has the features I want, high res DAC (24/192), etc, etc. I thought about the Audio-GD stuff, but I think this will be awesome. I've only read good things, especially this review here: http://www.head-fi.org/forum/thread/516993/review-matrix-cube-dac

But what I really need is my driver to start working! :P

So no ideas? It just makes no sense to me.

post #2588 of 5003
Quote:
Originally Posted by unchain View Post

Man, this sucks! I've got a new amp/DAC coming as well as wooden shells from Bill and this is happening! :( Does anyone have any clues? Mods that have been done are: quarter modded HD414 pads, removed the white cloth, 10 holes vented, Blu-Tack on driver back, grills replaced with aluminum mesh and the crappy silver paint taken off for a nice all flat black look.

 

I think it's gotta be the paint removal. It was keeping the bass tight, obviously.

Ever since I opened mine, I've been able to get the right one to pop by touching the shell. I know it's because the left one isn't pushed on as far. Basically it has a little breather hole so my touching the grill area has no effect like the right cup where it forces all the air into the diaphragm and results in the pop. With the extra air of yours that the holes provided, it's possible this happened to yours, not sure why it would have had the excessive air that covering the grill on mine did without any intentional covering from you, but instead of popping and going back to normal, it crinkled the mylar or something and left you with distortion.

However that may not be it at all since you said it completely went out on you at one point. You probably need to get a closer look at the driver to be sure, but that's all I have for you right now. Haven't punched anything yet so I can't say for sure.
post #2589 of 5003
Well, by just looking at it, I can't see any problems. If my drivers were liberated, I could really get a look at the driver, but they're not so there's no real way for me to get in there, and I really don't want to try and make things worse. I'm close to just picking up another pair, modding them, and using the 80s for spare parts. I really don't want to do this, but besides sending them to someone like Bill, I really don't know what to do.

I mean, the cabling seems fine, the back of the driver seems fine, what I can see of the driver mylar is just fine, I really don't know where to go. Amy more diagnostic ideas? The problem only happens when there's a real low frequency at higher volumes. Bluegrass sounds wonderful, but hip hop and dubstep are impossible to listen to at a volume that is enjoyable.

Bilavideo, I know it's a lot to ask, but is there any chance you might be able to look at them for me? I'd certainly pay you for your time. If not, I certainly understand. I'm going to poke at them a bit more when I get home tonight and see if I can't figure out what's going on with them, but if I can't, I really can't think of anywhere else to go with them.

Haha, I guess the IEMs I was going to buy next week are getting pushed forward a bit so I can play with my amp when it gets here, haha.
post #2590 of 5003
Thread Starter 

 

Originally Posted by pbandstefanwich View Post
Thanks Bill, it was super easy to get them out, even without the screw tip haha. How did you get access to the screw? Do you just have to pop off some cover on that knobby area? It looks like I was too eager to get them out and didn't fully think through the process!


Look at your pics.  See the circular piece, right around where you tore the assembly apart?  Take a small flat-head screwdriver and push it into the crack.  With a little leverage, it pops right out, exposing a small machine screw.  Remove the screw and life gets even easier.

 

Originally Posted by unchain View Post

Well, I'll be using Dynamat on them when I get my package from you, but right now I'm using Blu-Tack and covering the entire back. But here's the thing, the left phone sounds just awesome (I can't even imagine how good they'll sound once I get them woodied up!) but the right is just distorted to the point of being close to unlistenable...and just now when I was trying to figure out what was wrong, it went totally silent. I played with the cable to no effect. Then, I just gave it a bit of a tap, and it kicked back in, but it's still distorted. What is going on here? I can't see any problems...obviously I can't see the driver perfectly since they aren't liberated, but I can't peek any problems, and I don't know how they would happen anyway.


It sounds like your voice coil pulled out.  There's nothing holding it in.  It simply slips around the magnet.  Friction between the outer walls of the magnet and the inner walls of the magnet plate provide a seat for it.  A good punch of bass could have pulled it out.

 

Originally Posted by Melvins View Post

ohhh. Gotcha. You must have touched the driver, or something must be stuck in the shell it sounds like. 

 

That's another valid possibility - an obstruction.
 

Originally Posted by unchain View Post
Well, that's what I thought, but how do I correct it? I can't see anything wrong, I gently blew some air across the front and back of the driver to try to knock anything out, but why would that cause the headphone to just up and quit?


To be fair, this distortion is only at loud volumes with very low, punchy bass. I'd think it was my source or something else, but since the other headphone sounds perfect, I'm sure it has to do with that specific headphone.


If the drivers were liberated, I would have you press the voice coil back in by pressing against it with your finger.  That's a bit like sticking your finger in someone's eye but it works.  Since the drivers are not liberated, I've got some other work for you.  It's about as distasteful but I challenge you to give it a try.  

 

1. Remove the cushion and put your mouth over the grill, then blow.  You are doing a mouth-to-mouth.  Your job here is to blow on the diaphragm with such force that it pushes the voice coil back in.

 

2. If that doesn't work, try inhaling gently until you hear a click, then listen.  

 

3. Inhaling and exhaling are reverse processes used to uncrinkle the driver and possibly reset the voice coil without getting more invasive.

post #2591 of 5003
Thread Starter 

 

Originally Posted by unchain View Post
Bilavideo, I know it's a lot to ask, but is there any chance you might be able to look at them for me?


I thought you'd never ask.  Send them to me and I'll get right on it.

 

Bill

post #2592 of 5003

Sent you a pm billavideo

post #2593 of 5003
Alright, instead of being stupid and closing them up right away again, I listened to my 125is with the shells off. Wow they really do clear up without that stupid grill and button on there. Now, when the wood improves the stupid plastic that's there the rest of the way, I'll be happy. Still afraid to punch a hole in them though rolleyes.gif

I'm going ahead with the punch as soon as I get some wood, just hesitant to do it with plastic.
post #2594 of 5003

I just wanted to pop in here and reiterate all the appreciation for all the hard work people have put into this thread. It's inspired me to mod a Grado as my summer project. I'll be posting pics of my progress, and definitely will be asking lots and lots of questions as we go on. Thanks to everyone in here. 

post #2595 of 5003
Quote:
Originally Posted by Bilavideo View Post

That was a pretty clean extraction.  If you want to get the plastic assembly  apart a little more easily, you might take a screwdriver and unscrew the screw holding it together.  It's in that big knobby area you ended up breaking off.  I can remember how hard it was for me to get the whole thing apart until I realized there was a screw in there.



I'm sorry guys, but this did make me laugh. We've all done it - blazed on, sweating and swearing, only to realise that there was an easier way. Anyone who has spent time under a motor vehicle will know exactly what that feels like - Pennzoil might be great in the engine, but it doesnt taste too good :)

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