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Author Topic: Open T50RP  (Read 5613 times)

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stratocaster

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Open T50RP
« on: November 24, 2014, 05:13:32 PM »
Inspired by the new open-back Fostex T500RP, I decided to experiment on my own open version. Woudn't have thought it could work, but it did. Drivers are damped and I was using HM5verlour pads. These sound really balanced and smooth.

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aufmerksam

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Re: Open T50RP
« Reply #1 on: November 24, 2014, 05:45:53 PM »
Ha! Those look awesome. I like the upgrade to less-cheap headband compared to your other creations, especially the added strain-strap.
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Marvey

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Re: Open T50RP
« Reply #2 on: November 24, 2014, 05:47:38 PM »
Wowza!

But as I feared, the small driver doesn't like pushing bass in an OB.
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Claritas

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Re: Open T50RP
« Reply #3 on: November 24, 2014, 06:08:03 PM »
Very nice work! Ishcabible was trying to help someone in Boston (?) with a similar project. Both of us thought it was pretty unlikely to sound decent. What damping scheme did you go for?

I can't wait till Marv or Tyll measures TH500RP and puts that thread out of its solitary misery.
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spoony

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Re: Open T50RP
« Reply #4 on: November 24, 2014, 06:13:28 PM »
That's very interesting, great work!
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RexAeterna

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Re: Open T50RP
« Reply #5 on: November 24, 2014, 06:42:36 PM »
Amazing job strat. Always was thinking of making my t50rp open but my carpeting skills is shit. Stuffing my cups with high density fiberglass did good enough job for me.
Quote from: marvey on November 24, 2014, 05:47:38 PM
Wowza!

But as I feared, the small driver doesn't like pushing bass in an OB.
Bass looks fine to me. I think it was smart using the thick pads. Headphones are coupled dependent.  I was thinking replacing my shure 840 pads with some omegas or something one day but probably never gonna get around doing it.
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stratocaster

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Re: Open T50RP
« Reply #6 on: November 24, 2014, 07:10:22 PM »
Quote from: Claritas on November 24, 2014, 06:08:03 PM
What damping scheme did you go for?
You have to dampen the driver quite tightly. I used a layer of felt, topped with some damping paper and another layer of foam that keeps the damping felt/paper pressed against the driver.
The pads are essential. I have been testing pads extensively, and as all of you know the pads make a huge difference. Those who say this isn't so should see the wildly different frequency response plots when you swap pads (see attached pic of alpha pads on the same setup)  I always start with pad rolling to see which pad has the best potential for the driver. The secret is synergy. Synergy between driver plus pads plus enclosure. Damping will do the rest of what is possible within this combination.
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Solderdude

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Re: Open T50RP
« Reply #7 on: November 24, 2014, 08:02:05 PM »
Nice work ! (yet again) on the wood and most likely the sound.
Would have loved to hear that one....

Having a rig really pays off when modding.
I believe it is almost obligatory if you want to get it right.
They are a great 'handle on reality' when modding by ear.

The seemingly high distortion in the lower frequencies isn't distortion but is caused by a poor S/N ratio of the used mic/pre-amp.
Doesn't really matter for CSD's nor for FR measurements.


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Use your ears to enjoy music, not as an analyser.

spoony

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Re: Open T50RP
« Reply #8 on: November 24, 2014, 08:18:29 PM »
Quote from: stratocaster on November 24, 2014, 07:10:22 PM
I have been testing pads extensively, and as all of you know the pads make a huge difference.
Have you played with the Shure alcantara pads?
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stratocaster

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Re: Open T50RP
« Reply #9 on: November 24, 2014, 08:47:45 PM »
Quote from: c61746961 on November 24, 2014, 08:18:29 PM
Have you played with the Shure alcantara pads?
No, I haven't.
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