I'm not sure I'd recommend that one if it doesn't extend past 6khz.  A lot can happen to a pair of headphones in 30 years... If you're going after one, I think you would like the Mylar version best.  They seem to pop up much more often in Germany if you have a friend over there.  That's how I got mine.

Quote from: gurubhai on April 11, 2012, 02:42:53 PM

I have had the chance to hear two NAD RP18s (both mylar) & I would expect them to measure very well  stock compared even to current High-end headphones.
The stock mylar NAD are pretty neutral sounding with slight roll-off at either end of spectrum. Apart from a peak at around 4k, they are pretty clean & smooth sounding. The damping is nearly perfect stock.
The one area where it lags behind the current offerings is the soundstage, its pretty limited.

What pads?  I had some very deep pads on mine and they had excellent soundstage.  W11 pads also seem to give them good soundstage, though it's more up and down than left to right. 

Maybe we should have an ortho forum here.   

Quote from: rhythmdevils on April 11, 2012, 06:03:06 PM

Maybe we should have an ortho forum here.   

Created one in the Main Deck (to keep it from turning into something like HF.)

That's funny  I defected from an ortho ninja to stax mafia 4 or 5 years ago, though this forum has me more interested in investigating tube amps for vintage orthos. I had a 7788 spud amp with Electraprint OPTs that sounded really good with the LCD-2r1.

Though I heard multiple times that the stock T50RP pads are not the best sounding ones, and that I do find they irritate your ears to the point of becoming atrociously painful and unwearable, when you stuff a KSC75 pad (or an equivalent like a Radio Shack's; I use Sennheiser PX100's) in the oval where goes your ear, the foam and the pleather will combine and make up for an all around excellent comfort (and soothe your aching ears).



I still am optimist that I'll be able to open, mod and improve my Koda^2 headphones to decent sounding state.

I don't know what the insides of the KODA2 look like but you should have a better starting place than the stock T50rp cup unless he did something weird.  I imagine the koda baffle is at least more rigid.

Stock is better....KODA is well.... and 

His acrylic as a baffle is thick and super stiff.

The interior and the exterior are still like he shown them in the first series of photos (second series are pictures of the Koda^1) in his main post:
http://www.head-fi.org/t/582736/koda-2-k-nigs-ortho-dynamic-acrylic-headphones#post_7927522


By the way my pair is supposed to be less bad, lol:

(his measurements)

In grey are the stock Koda^2, and apparently only his pair and mine were "fine tuned to 'MK-II' " like that. He was doing so hoping to correct/improve the 200 Hz dip. This fine tuning consist of (and I'm quoting him from the Koda thread): "A smaller hole on the dampening on the back [of the driver or the chamber, it's unspecified] and smaller bass port." So the internals (other than the "dampening on the back") should have remained unchanged.

I can see the smaller bass port, being 1/3 of the original size:


Covering what is left of the bass port does remove some if not all of the deeper bass.

Yeah...I hate to burst your bubble but the set that Purrin measured is also a MKII.

The baffle is thick but the cups are a bit fragile. I have had them break apart three times already. I got fed up and just crazy glued the damn things together.

While they might be rigid, the inner volume is just not there. 

They are good looking though.

These headphones remind me of the typical Californian girl\stripper....so nice to look at but empty and worthless when it comes to actual value.