T50MKIII

Discussion in 'Headphones' started by MuZo2, Oct 4, 2015.

  1. JK47

    JK47 Guest

    Here are the measurments for open vs. closed vents . I prefer the vents fully closed so far, really smoothed things out. Almost 5dB Less at 90Hz, and +5dB in the 500-900Hz range.
     

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  2. JK47

    JK47 Guest

    Fully closed vents and cotton balls for dampening measurements. Really pleased with the cotton dampening, brought up the lower bass a bit, brought down the mid bass hump. Smoother delivery now... Going to try closing the bottom baffle vent next, and then both top and bottom closed.
     

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  3. gixxerwimp

    gixxerwimp Professional tricycle rider

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    We're kind of following parallel paths, but with me not having the benefit of a measurement rig (so lots of salt with my impressions). To try and match your latest setup, I put the stock pads back on and taped off the cup vents (cotton balls still in). The bass was tighter but much suppressed, with the upper mids and highs dominating - might be I've just become accustomed to the sound of the ZMF pads with 3 layers of TP.

    I taped off one each of the pair of baffle port holes at the top and bottom of the ear side of the baffle. ZMF pads back on and cup vents open (T50RP felt on the inside vs. your screen). This significantly increased bass response. I started taping off slits in the cup vents in the hopes that I'd reduce the mid-bass back to where it was with an increase in sub-bass. With 3.5 vents closed, I think that's what I have ... can't confirm with back-to-back ABing or FR curve though.
     
  4. JK47

    JK47 Guest

    Here's my measurement with Mr.Speakers alpha pads.Big bass hump, and mid range dropping quickly.

    For the $100 invested in the measurement rig, it's worth gettings. It's so helpful. I had to retune the left side twice to get them balanced. 1 rolled out cotton ball in the Left (mini-XLR and stock 3.5mm jack eating up internal volume), and 2 rolled out cotton balls in the Right side.

    I've been spoiled by my HD650's, and that's the direction I would like to go. I know I won't get the Tx0RP's into the same class, but they do execute a few things better, and it's fun experimenting.
     

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  5. gixxerwimp

    gixxerwimp Professional tricycle rider

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    @JK47 I agree that with Alpha/ZMF pads, no cotton balls and vents open they are unlistenable. But the cotton seems to compensate for the ZMF pads blocking the front baffle side vents.

    I'd be curious to see what you measure with Alphas and vents taped shut. That's probably the closest we'll get to the same mod setup. I have about 3.75 small cotton balls rolled out in each cup, but maybe my balls are smaller than yours (<1" diam.) ... erm, the cotton ones that is.

    I don't notice any suck in the mids. Maybe my TP balances out the mids/highs (Zach told me they cut mainly from 4k-10k). Bass seems to have a bit more slam with the baffle port 1/2-taped and cup vents mostly taped, compared to open all around.
     
  6. JK47

    JK47 Guest

    I tried the alpha pads over the cup and in the stock slit, barely any difference. I'll post results in a day or two of the ear side baffle vents taped shut.
     
  7. gixxerwimp

    gixxerwimp Professional tricycle rider

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    Sorry, just to clarify, I meant "Alpha pads over cups and cup vents taped shut". You're running yours taped shut anyway now, but having them open would be different since your 40s have a screen and the 50s have hard felt. There are too many vents and ports on these phones!

    I noticed a bit of difference between the ZMF pads over vs. in the slit. I think the rubbery part of the ZMF pads is thinner than on the Alphas and allows some venting out of the sides. I still had to tape the cup vents mostly shut to compensate for the bass boost.
     
  8. JK47

    JK47 Guest

    Here's where I'm at... Fully taped vents,stock pads, cup pivot taped shut, cotton dampeming (minimal), basically a T40RP mkIII...lol, and I'm liking it.

    Still not a fan of the Alpha pads on this setup, too much mid and upper bass.
     

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  9. spoony

    spoony Spooky

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    That looks very good already, anything to be done about the 10KHz peak?
     
  10. JK47

    JK47 Guest

    The 10kHz peak, should be able to be tamed, just more time and testing. I'm going to try and keep my path as simple and basic as possible..
     
  11. Hands

    Hands Overzealous Auto Flusher - Measurbator

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    Tape over driver. No more 10KHz peak. Or any peak. Or anything.
     
  12. gixxerwimp

    gixxerwimp Professional tricycle rider

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    That might be the difference between our setups. I adjusted the amount of cotton until the mid-bass sounded right to my ears.

    You're joking, right? Or are you referring to Transpore/Micropore on the back of the driver?
     
  13. Hands

    Hands Overzealous Auto Flusher - Measurbator

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    Best way to tame treble peaks is to just block the front side of the driver from making any sound whatsoever. Not sure why you think that's a joke.
     
  14. JK47

    JK47 Guest

    Alpha pads over the entire cup (mkII style), fully taped shut, tape over exposed earcup pivot post,... sounding pretty decent. Nasty dip at 5k though.

    May order the ZMF pads soon to try out, my alpha's are pretty ragged.

    Would almost recommend a T40RPmkIII with ZMF/Alpha pads, and call it a day, or the T50RP mkIII if you are comfortable opening them up to tune the vents yourself, and add a bit of dampening.
     

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  15. gixxerwimp

    gixxerwimp Professional tricycle rider

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    What was difference between this setup and the last one when you said there was too much mid and upper bass with the Alpha pads?
     
  16. JK47

    JK47 Guest

    The first one with the mid bass hump had the alpha pads in the stock slits, the second more recent had them over mkII style.
     
  17. MrTurtle

    MrTurtle Facebook Friend

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    I laughed a little more than I should have at that...

    On a more serious note though, I find 3M micropore tape on the front of the driver to be pretty good at taming treble. A little more drastic than a single layer of TP or thin felt, though.
     
  18. Darko

    Darko Acquaintance

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    New owner here. Gotta say I'm really impressed but already eager to mod. I'm thinking deeper pads and something to bring up the subbass. Other than that, I quite enjoy the way these sound. I'm only looking for better separation, as voices don't have as much air around them as my modded HE400's. I guess this should be expected since it's open (with large angled pads) vs closed with pretty much on ear pads. However, someone brought up a good point to me that Fostex probably made the pads so shallow for a reason. As far as materials go, I've got sorbothane, cotton balls, felt, and rug liner.
     
  19. Hands

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    Make sure you seal up any spots on the front baffle or around the pads/pad attachment mechanism so that air doesn't leak out. This will help with the low-end response in terms of quantity. Also play around with closing off some of the ports in the back of the cups.
     
  20. OJneg

    OJneg The Most Insufferable

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    So does the MkIII have more potential for modding than the MKII?
     

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