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ATH M50 Mod Thread - Page 4

post #46 of 55

I just made a mod to my M50s which is very simple:  New angled pads.  

 

I took delivery of the NVX XPT100 due to a recent sale ($100 for this Fischer FA-003 clone, plus the NXT clone of the in-ear VSonic GR06). 

 

http://www.head-fi.org/t/624729/review-nvx-xpt100-a-direct-brainwavz-hm5-competitor

 

Inside of the NXT box were an extra pair of these:

 

http://www.sonicelectronix.com/item_66627_NVX-XRE100A.html

 

They look like a pleather oval version of the Alpha Dog pads by Mr. Speakers.  The design is a little weird, though, as they are really two "right" pairs of pads.  Basically this means that the seams will be on opposite sides (bottom left and top right) when installed.  

 

I look at the size and think, if I take out the plastic mounting bracket from them, these might fit the M50s.

 

Well, it is nearly a perfect fit.  Now I have what might be called ATH-M50 Alpha headphones.  

 

So, what changes?  Comfort, for one.  The M50s are now super comfortable.  The angled pads mean my ears no longer touch the foam inside of the pad.  In fact, you can even adjust the toe in of the fit to change the pressure between the front and back of the pad very easily -- really useful for longer listening sessions.  Next, they have better imaging.  There might be a bass bump, as well, but I'm not going to swap back and forth to check (don't want to damage the pads).  

 

On the downside, the pads do have a little play in them when mounted, which means positioning becomes a bit more of an issue when you first put them on.  I think of that as a plus, though, because it helps with long-term comfort.

 

All in all, a big win.

post #47 of 55
Hi, does anyone here do this modification on the m50's in LA county ? specifically Pasadena Area. Hoping for a response. thanks!
post #48 of 55

Anyone know were I can find new headband trim for these headphones?

post #49 of 55
Modded mine last night... forgot to buy a cable long enough to work with my pc, but works great on my phone, also just for laughs I tried to install the pads from my cm storm sirus headset I blew before I bought these, turns out the pads fit like they where made for the m50s


Edited by THC Butterz - 5/20/14 at 4:59am
post #50 of 55
Quote:
Originally Posted by THC Butterz View Post

Modded mine last night... forgot to buy a cable long enough to work with my pc, but works great on my phone, also just for laughs I tried to install the pads from my cm storm sirus headset I blew before I bought these, turns out the pads fit like they where made for the m50s

Those are some big looking pads? How comfortable are those compared to the stock pads? Have you tried the DT-250 Velour pads at all?

post #51 of 55
Long time lurker here.

I did this mod last night on a set that had been a bit hacked by someone else and I am finding that the sound is mono (i.e. left channel coming thru both speakers)

I tested with a multi meter and there is no resistance (60 ohms) from the left circuit to the right circuit. Given that these both connect to the same ground wire this expected? Thoughts? Thanks
post #52 of 55

Quote:

Originally Posted by dwib44 View Post
 

Those are some big looking pads? How comfortable are those compared to the stock pads? Have you tried the DT-250 Velour pads at all?

No I havent tried the DT-250 pads, but these are super comfortable, but they take a bit of the thump out of the Bass due to less vibration from the cushy padding

 

Quote:
Originally Posted by frbhead View Post

Long time lurker here.

I did this mod last night on a set that had been a bit hacked by someone else and I am finding that the sound is mono (i.e. left channel coming thru both speakers)

I tested with a multi meter and there is no resistance (60 ohms) from the left circuit to the right circuit. Given that these both connect to the same ground wire this expected? Thoughts? Thanks

Something is definently wrong there, from g-L or G-R there should be continuity but not from L-R, you might have a bad Jack... I dunno

post #53 of 55
Quote:
Originally Posted by frbhead View Post

Long time lurker here.

I did this mod last night on a set that had been a bit hacked by someone else and I am finding that the sound is mono (i.e. left channel coming thru both speakers)

I tested with a multi meter and there is no resistance (60 ohms) from the left circuit to the right circuit. Given that these both connect to the same ground wire this expected? Thoughts? Thanks
It sounds like you have a short from the left channel to the right, but with the cable unplugged, I would expect a measurement in that range between channels (basically double the resistance of each driver, and the M50 has an impedance of 38 Ohms according to the specs). However, you can check this by comparing the left-to-right resistance to the left-to-ground (or right-to-ground) resistance. With an unplugged cable (floating ground, which is essentially in infinite resistance or open circuit), the left-to-right resistance should be double the left-to-ground resistance because you are measuring each driver in series.

Basically your unplugged circuit should look something like:

[L NODE] - - - [L DRIVER] - - - [GROUND NODE] - - - [R DRIVER] - - - [R NODE]

But if the channels are shorted:

[L NODE] - - - + - - - [L DRIVER] - - - - +
. . . . . . . . . . | . . . . . . . . . . . . . . . . .| - - - [GROUND NODE]
[R NODE] - - - + - - - [R DRIVER] - - - -+

In this case, measuring from a channel node to ground will have both drivers in parallel (with a resistance of [RL * RR] / [RL + RR]), and measuring between nodes would give you zero resistance (or close to it). Regardless of the values, you should get a better idea of what's going on before you start inspecting the physical construction.

(I hope that visualization works and is helpful...the "+" and "|" are used to show circuit paths vertically while "." is used for empty space since the forum ignores multiple spaces).
post #54 of 55
Quote:
Originally Posted by superjawes View Post

It sounds like you have a short from the left to right

Thanks for the thorough reply. That was spot on. I actually meant to follow up on this but I was finding this forum a bit difficult to use on android!

What was baffling me was that the impedance were all checking out when I measured it and given the behavior of the headphones the fault had to be with the female Jack. I tested the impedance with the cable plugged in (but disconnected at the other end) and found that this was shorting the left and right causing the mono output. This came about due to me bending the right terminal on the jack to get it to fit into cup.

Replaced the jack (luckily had another one) and it's all working! Thanks for the responses. Especially superjawes - I'm sure that should help someone in the future too.
post #55 of 55

Not much of a mod really, but it may interest some of you. I had a problem with a broken driver (the right one, perhaps a common fault?) in my ATH-M50s. I couldn't find any original drivers for sale so I replaced them with the drivers from a pair of Koss KSC75s (also 45mm and a near perfect fit). I removed the grille covers from the KSC75s and replaced them with some wire mesh (my attempt at the Kramer mod). They sound good in my opinion (detailed and balanced) and KSC75s are only $13 so it's a cheap mod/replacement if anyone wants to experiment.

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