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Author Topic: Sony MDR-1R  (Read 6501 times)

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Marvey

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Re: Sony MDR-1R
« Reply #10 on: December 18, 2013, 08:21:34 PM »

After mods.
  • I did not block the ports to reduce the bass, but inserted a shim into the front bottom of the pads to allow the headphones to "breath". Blocking (or partially blocking) the ports resulted in too much loss of low bass and seemed to bring about an increased shoutiness to vocals
  • Select parts of the cup, baffle, and back of driver were "Dynamatted." I only used small pieces and did not go overboard. I suspect the dynamat really helps to lower the higher order distortions of the bass
  • The inside of the cup was densely stuffed with acoustic fiber (NOT THE SAME AS COTTON, WALMART PILLOW STUFFING). This seemed to fill in the slight recess in the upper bass, lower mids.
BEFORE



AFTER



BEFORE



AFTER
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ultrabike

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Re: Sony MDR-1R
« Reply #11 on: December 18, 2013, 08:39:04 PM »

Yes, sealing the tinny port inside the HD202 completely removes the bass, which to me is worse than stock.

The port on those (HD202) almost has to be the size of a needle pin head... The shim idea sounds like a great alternative. Also, thanks for the pointers on the damping scheme to improve on distortion results.
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Marvey

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Re: Sony MDR-1R
« Reply #12 on: December 18, 2013, 08:49:35 PM »

Mod Notes:
  • Internal acoustic stuffing not shown.
  • Shim under earpads not shown.
  • The "dynamat" was roofing material from Home Depot. Both sides are adhesive. I placed a layer of fuzzy pillow stuffing over one side. If I had to do it again, I would have used Creatology foam. My supply ran out. The fuzzy stuff doesn't do anything other than prevent one side from sticking to everything. It should not be confused with the acoustic stuffing which I crammed into the cups (again, not pictured.)
Sound Notes:
  • Bringing the bass down a bit reveals the slight sharpness and rough nature of the treble. I may take out the shims under the pads to bring the bass back.
  • I'd like more air. Upper half of octave seems rolled.
  • Still slightly congested in the bass. That high D2 in the sub to low bass just isn't going away.
  • Works best at low to moderate volumes. The driver does not like being driven hard.
« Last Edit: December 18, 2013, 08:59:54 PM by purrin »
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munch

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Re: Sony MDR-1R
« Reply #13 on: March 27, 2014, 04:49:27 PM »

hmmmm really tempted to try this mod just because they're the darn comfiest portable-ish headphones I've used so far, and had pretty decent mid-range to me.
I can get a pair for ~$100 which I'd say is a pretty good price, in Europe and everything. and I don't listen very loud at all.

so, a few questions!
dynamat extreme, is that the thing to get? I have no idea what the difference between what you used and dynamat is.
or are you saying you'd skip the dynamat treatment altogether and go with the Creatology foam solo?
if not, dynamat + creatology is the way to go?

although, hmm... would you mind making some more detailed instructions? I don't think I'm very good at modding headphones :)p18
but I understand it's a bit much to ask for, just no idea where to start. :D
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Marvey

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Re: Sony MDR-1R
« Reply #14 on: March 27, 2014, 05:28:35 PM »

Just use regular dynamat type material. Part of it is mass loading the cups. I actually used roofing material.


  • Dynamat on inside back of cups.
  • Dynamat small piece of back of driver (don't cover up any vents or holes if any)
  • Stuff with acoustic fiber (cotton is NOT the same thing!!!)
No Creatology. Don't worry about being perfect in lining up surfaces.
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munch

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Re: Sony MDR-1R
« Reply #15 on: March 27, 2014, 08:16:58 PM »

oh, cool. let's see then...
http://www.amazon.co.uk/Dynamat-DYN10415-Xtreme-Speaker-Pack/dp/B00020CATC/
this is what people use right?
I can't really find anything that is acoustic fiber here, I don't really know what that might be. is there any brandname for these type of things?
any reason why you advise against creatology, despite talking about it in the previous post?

thanks!
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Marvey

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Re: Sony MDR-1R
« Reply #16 on: March 27, 2014, 10:56:34 PM »

Can you get wool in place of acoustic fiber?


No Creatology which is mainly used to absorb sounds of a certain frequency. We are using dynamat to mass load the cups to prevent them from vibrating. The dynamat material is kind of heavy. The wool or fiber is the expand the effective internal volume - possibly lowering bass a tiny tiny bit and offer a more spacious presentation - in addition to absorbing any back waves which might reflect inside the cup back through the driver.
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munch

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Re: Sony MDR-1R
« Reply #17 on: March 27, 2014, 11:14:24 PM »

ah, right, well that's what I assumed. I just don't know each material's properties enough to make sense of it.

ok, so... sorry if I'm not understanding this at all but does it matter what type of wool? density, thickness, like a pressed wool type thing or...?
unless they don't really make that much of a difference that it would matter?
if it reduces bass volume just a little bit, I'd rather not skip this step - a bit too much of that loose bass is the only thing that I am on the fence on with these phones. :P

fairly sure I can get some sort of wool, but I have no idea what type to look for.

thanks again!
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Marvey

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Re: Sony MDR-1R
« Reply #18 on: March 28, 2014, 12:31:43 AM »

honestly, i don't think it did that much to the bass.  As for wool, look for stuff teased out to maximize volume to mass.


I would recommend fiberglass insulation, but that stuff is nasty.
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munch

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Re: Sony MDR-1R
« Reply #19 on: March 28, 2014, 12:55:57 AM »

ohh alright, so just some wooly wool. okay, that makes sense. should read up on exactly how it affects the sound... curious now.

:D yeah I'd rather not deal with fiberglass insulation. had a few incidents with that before.

thank you, I think I'll give this a shot. you make it sound easy enough!
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