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Just listened to some Fostex T50RPs today... WOW! - Page 705

post #10561 of 10711
Quote:
Originally Posted by Lohb View Post
 

Can anyone suggest an OPAMP I can exchange in an 18 volt CMoy as LM4562 too bright and fatiguing...

http://www.ebay.com.au/itm/Biasing-Mod-Burr-Brown-OPA627BP-upgrade-part-for-Matrix-m-stage-AMPs-/130909601698?pt=US_Home_Audio_Amplifiers_Preamps&hash=item1e7ad1ffa2&_uhb=1 

 

I had that one in my CMoy BB, was an excellent combo!!

 

Good luck!

post #10562 of 10711


and you found it OK ! Way too sparkly for me vs speaker taps amp signature which is just right.

I find the LM4562 one only good with certain cans. Wish I could fit/sample Muse 01/02 but voltage too high and no space for their style.


Edited by Lohb - 4/18/14 at 4:18am
post #10563 of 10711

 guys this is not cmoy thread.

post #10564 of 10711

MuZO2 sorry, the CMOY chip was to pair with T50RP's but you are correct will take it over there.:redface:

post #10565 of 10711
Does anyone here have any feeling whether it's worth getting the Mad Dogs 3.2 if one already has a pair of t50rp modded to dbv3?

I'm not asking for a quality judgement on their sound but I would like to know if they're different enough so that it makes sense having both.
post #10566 of 10711

Anyone know what entry-level mobile amp is not going to make the treble brighter on T50's ? Something sub-$150 is what I'm trying to find ? E12 etc ?

post #10567 of 10711

Yeah E12 is undoubtedly your best bet in that price range.  I have one and the high gain setting gives the t50rp plenty of juice/volume.

post #10568 of 10711
+1 for the E12, I'm really enjoying the combo with t50rp.
post #10569 of 10711
Quote:
Originally Posted by peter123 View Post

+1 for the E12, I'm really enjoying the combo with t50rp.


How is the treble as it is on your T50's un-amped ...recessed/flat/accented ? My T50's can run off my Macbook Air + speaker amp + Altoid but in the case of the altoid treble is too etched.So power is not the main issue ....E12 gets mixed reviews on treble, I guess due to audio chain synergy.

post #10570 of 10711
Quote:
Originally Posted by Lohb View Post


How is the treble as it is on your T50's un-amped ...recessed/flat/accented ? My T50's can run off my Macbook Air + speaker amp + Altoid but in the case of the altoid treble is too etched.So power is not the main issue ....E12 gets mixed reviews on treble, I guess due to audio chain synergy.

Tbh I don't here much difference in the treble switching between the x3 unamped and the x3 feeding my e12. Biggest differences is better clarity and fuller and more controlled bass.

On my pair I'd describe the treble pretty flat and smooth.

I hope that help smily_headphones1.gif
post #10571 of 10711
Quote:
Originally Posted by peter123 View Post


Tbh I don't here much difference in the treble switching between the x3 unamped and the x3 feeding my e12. Biggest differences is better clarity and fuller and more controlled bass.

On my pair I'd describe the treble pretty flat and smooth.

I hope that help smily_headphones1.gif


TYVM.

I'll give it a go while I decide on an RSA F-35 or iBasso PB2 for T50RP's.


Edited by Lohb - 4/30/14 at 8:21am
post #10572 of 10711
Quote:
Originally Posted by Lohb View Post


TYVM.
I'll give it a go while I decide on an RSA F-35 or iBasso PB2 for T50RP's.

FIY I got my e12 brand new from an eBay seller putting in a best offer for $88. I'm very pleasantly surprised by it's performance.

Good luck smily_headphones1.gif
post #10573 of 10711

I've had my T50RP for about 2 weeks now, and I've already begun to dissect them and make them mine! >:)

 

Bondo'd. I primered them later with automitive primer and filler. photo IMAG07141_zpsed81b3a7.jpg

I used automotive paint and clear coat (like 5 coats of clear) photo IMAG0719_zpsb3dbfaf4.jpg photo IMAG0720_zpse2a8e3c0.jpg

And some carbon fiber vinyl wrap for the center. The holes for the headband are cut through with an exacto knife, it should pop through with no problem.

This edited picture represents the color of them better than the others.

photo IMAG0721_11_zps90db6cb8.jpg

 

Don't mind the blue-tiger-strpied effect in the pictures, my camera's lens causes that. Junk.

 

I'll be installing Hifiman connectors on them in the near future. 

post #10574 of 10711
Quote:
Originally Posted by Lohb View Post
 

LM4562 too bright and fatiguing

 

I'll give you that 4562 sounds pretty bleh but there's really only one way to make a phone sound flat: http://www.head-fi.org/t/413900/how-to-equalize-your-headphones-a-tutorial

 

http://www.davidgriesinger.com/headphones.htm

 

"the coupling of high frequencies to the eardrum varies greatly among individuals.  It is influenced by the volume of the concha, the diameter and geometry of the ear canal, the eardrum impedance and other factors.  Lacking probe microphone measurements at the eardrum, the best way to equalize a headphone is by listening."

 

Quote:
Originally Posted by volly View Post
 

ebay.com OPA627BP

 

OPA627BP shipped directly from China on ebay = 99.99% chances of being fake. Either counterfeit or whatever chip with a fake rebranding.


Edited by leeperry - 5/8/14 at 1:41pm
post #10575 of 10711

Sorry to anyone who saw this same post in another thread!

 

I want to call this my DE4D mod, because the drivers look like cartoon dead eyes Haha

I'm personally going to keep the very small piece of memory foam on and not the thicker piece, because I like a flavored sound. 

 

 

 

Having it with this configuration will make these things awesome for dubstep and EDM without being too bass heavy. The Treble is bright and the mids are only slightly recessed.

 

Stacked in this order:

 

memory foam (you choose how much)

thin plastic X that sits on the corner screws of the driver and isn't actually sitting ON the driver, just hovering over it.

white tac holding it on and surrounding the driver

driver

 

The cups are dampened with Dynamat Extreme, vents are totally sealed off with Bondo, and I'm using Shure 840 pads.

Terminated to dual SMC connectors for use with Hifiman cables.

 

 

If you keep this big chunk of memory foam on them, they get more neutral sounding. I don't have a way to measure the sound though, so that's just by ear. 

 


Edited by cCasper TFG - 5/13/14 at 4:54am
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