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Sennheiser unipolar 2000 mod thread - Page 3

post #31 of 170
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Edited by vid - 10/15/13 at 4:30am
post #32 of 170
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Edited by vid - 10/15/13 at 4:31am
post #33 of 170

According to many sources, this headphone was a real flagship when they came out. I heard a pair one month ago, a friend bought a pair on ebay. They sounded good but to my ears (and to my friend's ears) a pair of AKG k701 sounded quite better. His pair is mint and stock configuration. I hope that the above mentioned mods can elevate it to a higher level. Of course it is always nice to try new things if you can buy them cheaply. 


Edited by muxamed - 3/23/13 at 12:38am
post #34 of 170

Since these are electrets, I wonder if they behave anything like Stax's earlier electrets or being able to be modded to Stax termination and be powered off a SRD adapter.

post #35 of 170
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Edited by vid - 10/15/13 at 4:31am
post #36 of 170
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Edited by vid - 10/15/13 at 4:31am
post #37 of 170
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Edited by vid - 10/15/13 at 4:31am
post #38 of 170
Persistance pays. I put felt behind the drivers too but didn't feel the results were wortwhile. If that treble could get tamed... The two-way 2002 suffers in this this regard as well, but not to the same degree as it is bass heavier.
post #39 of 170

Would the 2002 work with the 2000 energizer vice versa? I see a deal from UK on fleabay and looks tempting.

post #40 of 170
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Edited by vid - 10/15/13 at 4:31am
post #41 of 170
Quote:
Originally Posted by DefQon View Post

Would the 2002 work with the 2000 energizer vice versa? I see a deal from UK on fleabay and looks tempting.

They used the same energizer.
post #42 of 170
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Edited by vid - 10/15/13 at 4:31am
post #43 of 170
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Today's Unipolar 2000 auction (phones sans power unit) ended at 35.60 €. Hopefully went to someone on here and who can source an HER 2000.

 

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These are the uncompensated raw measurements for the two channels modded. I keep forgetting which is left and which is right, so I've simplified the naming.

 

You can check out a basic example, roughly, of one type of compensation curve here, i.e. a curve that would be reduced from raw measurements to arrive at an estimation of how the response would be perceived. The Unipolar has the 3 kHz peak and some of the lead-in upwards slope, but both measure about 5 dB lower than they 'should', and the rest beyond that is abnormally flat. I'm not sure whether this is a problem with my measurement setup - as I've mentioned earlier, I've had much trouble getting conventional-looking measurements out of the Uni unlike with most other over-ears I've tried - or whether it is that Sennheiser used an odd equalization curve for these phones. The drivers were meant to sit in what would basically have been free air, slightly angled towards the ears, acting as tiny speakers of sort.


Edited by vid - 4/9/13 at 7:50am
post #44 of 170
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Edited by vid - 10/15/13 at 4:32am
post #45 of 170

Would you say modding the drivers into a different housing would improve the sound? Especially one that has enough dampening, open and resonance free grills?

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