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Orthodynamic Roundup - Page 1499

post #22471 of 23545

Trying to get "moar bass" out of the PMB100 seems to require the elimination of allot of what make the headphone interesting.

Instead, I ended up accepting that there were limits to the design. I think the open aspect were unique to it and worth preserving. 

Is the headband on it fixed or suspended on elastic?   

post #22472 of 23545

Is the headband on it fixed or suspended on elastic? 
It has a elastic, but not sure what you mean by headband is fixed. I read there were two versions but haven't seen a picture of other.

post #22473 of 23545
Quote:
Originally Posted by GREQ View Post
 

Well you're welcome to try if you can get your hands on it.
I'll let you know if I see the headphone re-listed.

I wouldn't even know what would be the proper way to start...

 

Maybe plastic wrap, lightly stretched, somehow adhered with heat? :confused_face_2:

 

(the thought seriously occurred to me after buying a lumberjack sandwich from the grocery store and seeing them wrap then seal it by rolling the plastic film across a heated platform)

post #22474 of 23545

How are they made, are the etched out on mylar?

post #22475 of 23545

Copper/Aluminum foil of the 6-12um flavor typically adhered to (or vacuum vapor deposited onto) Mylar/Kapton of the 6-12um flavor. Then an etch mask is created somehow and everything but the circuit is etched away in an acid bath. That, or the manufacturer can selectively vacuum vapor deposit the Aluminum/Copper/Gold/what have you directly to the diaphragm substrate, very similar to how many manufacturers produce RFID antennas.

post #22476 of 23545

http://shop.geistnote.com/1.8Foil.asp#gsc.tab=0

Found source of thin Al foil.

 

 

post #22477 of 23545

Seems PMB 100 is not too rare found another one on ebay today.


Edited by MuZo2 - 3/4/14 at 3:30am
post #22478 of 23545

With the sprung PMB100 headband, the headband could possibly cause reflections if it hung down over the back of the driver. There may have been other differences between the two, but it's been a while since there was much discussion about them here. It's great that you've found another. I don't know if we have any idea how rare they might be. They are a mass produced electronic item- there must have been thousands made. 

post #22479 of 23545

Okay, any of you ortho masters know about these headphones?
http://seattle.craigslist.org/see/ele/4350563853.html

post #22480 of 23545
Quote:
Originally Posted by mechgamer123 View Post
 

Okay, any of you ortho masters know about these headphones?
http://seattle.craigslist.org/see/ele/4350563853.html

Nice find.

I almost lol'd though.

Beyerdynamic clone headband construction.

AKG clone inner headband.

Almost Audio Technica'ish style cups.

What a mish-mash of styles.

post #22481 of 23545

Looks like a DUAL oem, DK-720 or so.

post #22482 of 23545

 

Its like a closed version of PMB80 

post #22483 of 23545
Quote:
Originally Posted by GREQ View Post
 

Nice find.

I almost lol'd though.

Beyerdynamic clone headband construction.

AKG clone inner headband.

Almost Audio Technica'ish style cups.

What a mish-mash of styles.

 

GermanMaestro (previously PMB, etc ) still uses a very similar headset.

 

Quote:
Originally Posted by leeperry View Post
 

Looks like a DUAL oem, DK-720 or so.

 

It is a Dual OEM. It's a nice find, it's rather unusual. 


Edited by DefectiveAudioComponent - 3/5/14 at 8:24am
post #22484 of 23545
Quote:
Originally Posted by DefectiveAudioComponent View Post
 

GermanMaestro (previously PMB, etc ) still uses a very similar headset.

Yup and they've been doing it for years.

I had a Stanton SRS 265 (rebranded - MB Quart 70) and the headband and cable were literally IDENTICAL to my vintage DT990 (same era). 

Clearly someone at Beyer forgot to sign an exclusivity contract with the factory producing those parts.

post #22485 of 23545

Thanks for the impressions guys. Would it sound good for the asking price? Or do you guys think I should see if I can low-ball him?

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