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Orthodynamic Roundup - Page 72

post #1066 of 23454
I suspect you're not gonna get much bass out of those because of the closed back magnet(at least I think they might be closed back I've been browsing orthodynamic tweeters on ebay and alot of them seem to have one magnet with a closed back and the back wave is probably bouncing off the magnet).
post #1067 of 23454
Audiocats >> if you want, we can try using my 55x baffle and seeing how that will affect the sound. I mean your 45x solid baffle pretty much sounds the same as my 55x solid baffle, but the size of the baffle can change the sound too. I wanna get to modding the yh-100 back into the 55x too so our fosterphone projects should be able to progress in a pretty similar manner IMO.

Here's what I did for my baffle:
55x baffle felt, laid a layer of blu-tak on the back side of the felt, laid another layer of felt over each spot of blu-tak. It's a solid baffle but I think it is a "soft" baffle. I'm thinking about cutting plastic and then gluing it in permanently for a rigid baffle rather than a soft one.

I'm also suspicious of the middle column that bisects the venting on the housings. I might just cut out the whole vent (save the screw holes) and put in a high air-flow mesh. (Maybe a hex mesh with 75% airflow or just wire mesh with something like 80% if I remember correctly. Round hole mesh is only 50%) I figure I might as well go all out and remove as many obstructions to backwave as possible.
post #1068 of 23454
Thread Starter 
Quote:
Originally Posted by AudioCats View Post
No echo, highs and mids are pretty good, just not enough bass. Maybe the 45x pleather pad has too big a center openning?
You do have an airtight seal between driver and baffle, right?

You might even try cutting the damping fabric off the back of the driver to get the lowest possible resonant frequency.


Quote:
Originally Posted by AudioCats View Post
Wualta, I don't seem to find the post about your UR40 project. Help.......Please...........
Keep in mind that the UR40 transplant was just a proof-of-concept, not a refined, finished project. It may or may not provide the thumps you want, but here it is.


Quote:
Originally Posted by AudioCats View Post
Maybe I should put the SFI's into my iGrado housing and micky-mouse a pair of "behind the neck street style" ortho? I do have mini pleather pads to go with them.
This sounds interesting, fun and even doable.


Quote:
Originally Posted by Nagasaki_Kid View Post
I suspect you're not gonna get much bass out of those because of the closed back magnet(at least I think they might be closed back I've been browsing orthodynamic tweeters on ebay and alot of them seem to have one magnet with a closed back and the back wave is probably bouncing off the magnet).
Not to worry. If you do a search on eBay for the terms <sfi> and <bipole> you'll see the dipole version. But you're right-- the closed-back version is strictly a tweeter and won't work as a headphone driver.

.
post #1069 of 23454
I need to revisit my UR-40 retrofit. Add more felt, denser foam, earpads that still have pleather on 'em . . .
post #1070 of 23454
45x ortho update:
* the bass problem seems to have something to do with large circumaural pads. I tried stock 45x pleather, Panasonic pleather (from the HT355), and philips mini pleather. The 45x and HT355 pads are about the same, the Philips mini has a lot more bass, but still only about as much as the Panasonic HT355 ortho (the first pair). Looks like the big circumaural won't work too well for the SFI in the 45x housing. Small openning supraural is a lot better.
* mini pad within large pad won't work. I tried putting the mini within the 45x pad, looks cool, but the bass still the same as 45x. I think the problem here is the 45x pad is thick, the ear is further away from the driver, so this supra/circumaural pad still won't work.

So, it looks like the pad need to be small and thin, mini pads the best, but mini pads in that big 45x baffle? ?

Maybe a quad driver solid baffle Accura should be created, for experiment sake....
post #1071 of 23454
Thread Starter 
Good work, AC.

[starts formulating Iron Law Of Earpad Volume]
post #1072 of 23454
Ummm... hi guys.

Looks like I'm joining team Ortho. So is there any secret handshake? I don't really have to read all 54 pages of this thread, do I?
post #1073 of 23454
Who would read all 54 pages? I got tired after 30 pages and didn't care about those soviet clones. I decided to just enjoy my hp-1. The only large thread I've ever got through was that sarcastic BOSE bashing thread.
post #1074 of 23454
Phil(odox)

Dr. W should be sending out the Ortho quiz and it's supper important to read each and every post on this thread. I've failed the test about 5 times now.
If you pass the test you unlock the secret smiley icon with the smiley face with a piece of felt stuck to it's back.
post #1075 of 23454
Did he just call me Phil?



EDIT: Dammit, I want that smiley face! *Patiently awaits his Ortho quiz*
post #1076 of 23454
I almost fixed it.
What flavor of Ortho is heading your way?
post #1077 of 23454
I think the reason the HT355 ortho has ok bass was due to my ears filled a large portion of the pad, so the actual space left inside was not that much. These pads might be the smallest circumaural to use with SFI (pads have 2.5"x1.5" opening). Sony CD-180's fabric pads are about the same.

With the " mini pleather within 45x pad" combo, it became an extra thick superaural pad, the ear was too far from the drivers, so despite the mini pleather took up most of the space, bass didn't improve....

next one will be SFI transplant into Koss TD60, (small superaural soft pleather, semi open back). Stay tuned.
post #1078 of 23454
Quote:
Originally Posted by JadeEast View Post
I almost fixed it.
What flavor of Ortho is heading your way?
I believe that flavor would be Chocolate.
post #1079 of 23454
Quote:
Originally Posted by swt61 View Post
I believe that flavor would be Chocolate.
post #1080 of 23454
Thread Starter 
Quote:
Originally Posted by swt61 View Post
I believe that flavor would be Chocolate.
Remember: Please Don't Eat The Earpads.

Are you getting a chocky YH-100?
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