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*3/10/13* Updated Denon AH-D7000 Open-Back Mods Evaluated by Purrin & Tyll - Page 6

post #76 of 81

Did you try the TH-900 open back? If there is a dramatic tonal shift, I would be interested. 

post #77 of 81
Thread Starter 
Quote:
Originally Posted by applebook View Post

Did you try the TH-900 open back? If there is a dramatic tonal shift, I would be interested. 

  

 

I no longer have the TH900's. I wouldn't expect a dramatic tonal shift. The primary benefit of doing this mod would be the benefit of opening up the sound stage significantly.

post #78 of 81
Quote:
Originally Posted by lmswjm View Post

3/10/13 Swan Song Update: 

 

I’ve since changed the mod by closing off the pad slots with tape and sealing the gap between the pad and frame with black caulk. The result is stronger bass at the cost of a little bit of soundstage. I prefer these to the technically superior TH900 because of the openness. 

 

 

 

 

Okay, but I am confused, by doing the above aren't you in effect just making the pads thicker? Do you think that the caulk is acting as a dampening material? I am about to purchase a set of D7000s and I woukld be interested in first trying pad modification, but it seems you have completely changed your approach here which begs the question is this change of heart simply due to a desire to experiment further, or did you start to feel the previous modification treatment of the pad was either not as effective, or perhaps was actually detrimental in some way?

 

I am very intrigued by this process, and I wish some audio engineers could evaluate the potential effects of this using both theory and computer modelling. I certainly trust the ear first, but my mind tells me that if it sounds so much better then it should be measureable.

post #79 of 81
Thread Starter 
Quote:
Originally Posted by Sonic Defender View Post

Okay, but I am confused, by doing the above aren't you in effect just making the pads thicker? Do you think that the caulk is acting as a dampening material? I am about to purchase a set of D7000s and I woukld be interested in first trying pad modification, but it seems you have completely changed your approach here which begs the question is this change of heart simply due to a desire to experiment further, or did you start to feel the previous modification treatment of the pad was either not as effective, or perhaps was actually detrimental in some way?

I am very intrigued by this process, and I wish some audio engineers could evaluate the potential effects of this using both theory and computer modelling. I certainly trust the ear first, but my mind tells me that if it sounds so much better then it should be measureable.

It didn't make the pads thicker, it just sealed the opening, which yielded better bass. Prior, there was a steep roll-off below the 30 Hz range.

BTW, I decided to keep the open D7000's afterall. I just couldn't part with them.
Edited by lmswjm - 5/16/13 at 7:50pm
post #80 of 81

I am of course going to just use my D7000s stock for a while, but I will likely try the pad modification process. I hate to be a pain, but the process seems to have been explained over a few posts, are you able to detail again the steps and the results of the pad modification process, especially now that there is a change. Great thread, and a very intriguing mod you have come up with. Thank you very much for all of your efforts.

post #81 of 81

Subbed.  Replying seems to be the only way to see these. 

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