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= Hifiman “Fuzzor” Mod = (Driver backwave felt damping modification) - Page 6

post #76 of 80

This morning I have done some listening comparison between the the left driver with the "Black Pearl" fazer beads mod and the un-mod right driver of my HE-500.

 

The HE-500 is with the HE-560 production Focus pads. I use foorbar2000 for playback so I can activate the stereo channel reverse and stereo to mono down mix at time of playing for comparison.

 

To my surprise, the most obvious effect of the mod is sound stage. On the mod left driver side, the sound seems coming more from before my head and less coming from the side. I have confirmed this by reversing channel. The sound stage on the left hand side has more depth and is more "out of my head". Sound coming from the un-mod right side driver seems more "substantial", where at times I can feel the sound is directly coming out from the driver diaphragm.

 

It is actually quite funny listening to this uneven sound stage. It is like you are sitting in on the right hand side in a concert hall, with the wall on the right closer to you. The musicians and instruments on the left is more away and spread out.

 

I was expecting to have music note coming from the left to be more "defined" like the people are saying with their LCD Fazer. But I don't feel that with my Black Pearl mod. I do feel the sound from the left decays a little bit faster now.

 

Overall the result is not what I was expecting, but I like the change of the sound stage effect very much. I expect with both drivers modified, the sound of the HE-500 will be more "out of my head".


Edited by borrego - 8/19/14 at 10:29pm
post #77 of 80

I have completed my "Black Pearl" mod to both sides of the HE-500 drivers. The improvement higher volume or transient is quite obvious. Only now the HE-500 is able to take advantage of the HE-560 angled pads to move the sound stage before my head. Before I cannot tell much difference on sound stage between using HE-560 angled pads or the stock HE-500 velour pads.

 

The cymbal sound has the most improvements. Before the mod, cymbal sounded quite one dimensional and I can tell it coming. Now it has got more layerings.

 

Overall it is worthy of my time spending 4 hours gluing 160 4mm half-ball beads to the HE-500 grids. :) 


Edited by borrego - 8/17/14 at 9:04am
post #78 of 80
Quote:
Originally Posted by borrego View Post

I have completed my "Black Pearl" mod to both sides of the HE-500 drivers. The improvement higher volume or transient is quite obvious. Only now the HE-500 is able to take advantage of the HE-560 angled pads to move the sound stage before my head. Before I cannot tell much difference on sound stage between using HE-560 angled pads or the stock HE-500 velour pads.

The cymbal sound has the most improvements. Before the mod, cymbal sounded quite one dimensional and I can tell it coming. Now it has got more layerings.

Overall it is worthy of my time spending 4 hours gluing 160 4mm half-ball beads to the HE-500 grids. smily_headphones1.gif  
I would assume your mod uses "dispersion",
While the felt uses "absorption"..
I wonder what the lcd method implies.
post #79 of 80
Thread Starter 
Quote:
Originally Posted by Maxx134 View Post


I would assume your mod uses "dispersion",
While the felt uses "absorption"..
I wonder what the lcd method implies.

Neither, the LCD Fazors are waveguides (of the soundwaves originating from the diaphragm, toward the ears).

post #80 of 80
Quote:
Originally Posted by Maxx134 View Post


I would assume your mod uses "dispersion",
While the felt uses "absorption"..
I wonder what the lcd method implies.

 

I chose using beads to disperse the reflection mainly because I don't want to mess with the frequency response. I don't have any measuring tools thus it is difficult for me to understand what the felt will do to particular frequency. The other reason I don't use felt is because of the uneven glue stains already there on the HE-500 driver grid, I really can't think how I can apply the felt evenly  flush on the grids.

 

I think the main function of the LCD Fazers are wave guides, but I think they also serve the function of dispersing reflections.

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