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Orthodynamic Roundup - Page 815

post #12211 of 19952
Thread Starter 
That sounds like the SE-700 diaphragm, but it could also be damping applied to an iso (not ribbon) speaker or tweeter 'phragm.

It's also possible they stiffened a normal-mass plastic diaphragm just enough by foaming the plastic, making it self-supporting so it didn't have to be tensioned (the idea behind the Yamaha corrugated "pinch" arrangement).

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post #12212 of 19952
Kinda expensive headphones those Denon at the time they were released.
post #12213 of 19952
There was also this maybe-ortho.
post #12214 of 19952
technics eah-820 on the way!
post #12215 of 19952
Thread Starter 
Yay!
post #12216 of 19952
oops- i meant technics
post #12217 of 19952
there is a Technics EAH-830 on sale on ebay UK for "Buy it now" if anyone is interested.
post #12218 of 19952
Thread Starter 
If they're cheap, grab 'em. Good diaphragms to experiment with. The headphones themselves are mediocre, but the diaphragms look very Fostex-like.
post #12219 of 19952
99GBP and has a dodgy connection = must be off his bloomin rocker ..dB
post #12220 of 19952
Quote:
Originally Posted by dBel84 View Post
99GBP and has a dodgy connection = must be off his bloomin rocker ..dB
If you look carefully, you also see that the pads are out of service, with paint on them. The paint has also flaked off here and there off the cups. The headband looks a bit worn. The print on the cups is also worn off a bit.

Probably it's a dodgy connection as the seller claims, but really, it could be anything.

The seller though thinks that his headphones are worth a fortune. Unfortunately. Maybe he is right, in the long run?
post #12221 of 19952
Quote:
Originally Posted by barleyguy View Post
Parallel will yield 60 ohms, series will give you 240.

If you use two drivers wired to the same source with the "quadraphonic" configuration, you are going to get comb filtering in every frequency that is out of phase. It might sound OK, but it's likely going to have large dips and peaks in the frequency response. Either that or you'll get narrow comb filtering that will sound OK in the short term but will cause listener fatigue.

You might consider wiring them separate, and then connecting them to the front and back channels of a surround sound decoder (through two headphone amps). That might sound really cool for movies and games.
I was actually wondering about that as well. More questions that I didn't ask being answered... This is exactly why I came here. That's an awesome idea for movies and games, though if I did do that, I think I'd just leave the old-school drivers in as I only really crave hi-fidelity for my music.

Speaking of which, I just found a pair of super thin ATL/Atlantis phones that were made in Japan with thin, square-shaped cups/pads that I think might work for the ortho drivers if I vent the rear baffle somehow. They look very similar to the B&O's pictured on the second page of this thread.



Anyone familiar with ATL/Atlantis HP's?
post #12222 of 19952
Today I got the 32ohm SFI drivers for which I swapped a set of 120s with BoilermakerFan (thanks BmF - I hope your goodies have arrived and are OK).

I keenly threw these into the QP805s that have housed my 120ohms and which I enjoy. The swop took five minutes, and with that time between listenings I couldn't hear a significant difference between the two. Test tones show that they deliver a pretty much equally flat response, both do quite well with the Glenn Gould, Goldberg variations test, in which the more clearly you can hear Mr Gould singing, the better the detail of the can.

My electronic bass test is DMX Bass by the DMX Krew, both do well.

The 32s are obviously much easier to drive and are happy straight from an ipod out, albeit better from a portable amp. I suspect that the 32s sound a bit more controlled with my Canamp, there is really good instrument separation in a way that I hadn't quite noticed with the 120s (could be that it was there but i just hadn't noticed it), but I guess that different amps might respond better or worse to one or the other.

These are going to be really versatile cans.

I modified the cans a couple of weeks ago by cutting away the plastic from the front of the baffle so that it doesn't cover the drivers at all, just like the K340 mod. It was a good mod, clearing up the sound nicely.

Also today I got some 100mm pads from these guys in HK http://stores.shop.ebay.co.uk/howtor...__W0QQ_armrsZ1. They diminish bass on the QPs but on the T20v2s they fit well, similar depth to stock, but a wider hole in the middle. They sound similar to stock, less easy to get a good seal, but they're new so that might improve. I'll try comparing the stock and these more closely...
post #12223 of 19952
Well, the foam that came with my DT990 pads behind the new pads on the T20s works really well - the seal is no problem now, and these sound great.
post #12224 of 19952
Quote:
Originally Posted by lecky View Post
(thanks BmF - I hope your goodies have arrived and are OK).
Glad to hear yours arrived safe and sound. Your package showed up Sat., but I haven't even opened it to check them yet.

We were just sidetracked with a gorgeous fall weekend with temps is mid-70's degF so we were not inside much.

The Stax O2 pads work very well on the QP805s. Comfort and great seal for bass.
post #12225 of 19952
But if only I could afford Stax pads... It sounds like just the thing too. But for now they're sounding pretty nice, and the stock pads are nothing if not durable, even though comfort could be better.

The weather here's been nice too, albeit not mid 70's nice.
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