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JVC HA-RX900 modifications, a picture tutorial. (56k, forget about it...) - Page 14

post #196 of 205

Wow. I just got these and removed the felt. I'm not an audiophile at all, and they're not burned in, if you believe in that (I don't), but the difference is quite noticeable, and sounds seem much more "crisp". I'm glad I did this. Thanks for the guide!

post #197 of 205

I removed the acoustic lens on mine and opened up the holes in the remaining layer of felt. The sound is now quite literally like that of a veil being lifted, or perhaps someone pulling aside the curtain between you and the speakers. Mine have less than 48 hours of burn in and I love the sound already. Ultrasones they are not, but for the price these are so very good, especially when paired with a ZO2 amp. They refuse to distort even at maximum bass. Listenining to NIN's Ghosts II right now and its all good. There _is_ the odd shrill now and then, but I might wait a little before doing the sound deadening mod; it might just be because these aren't fully burned in yet.

post #198 of 205

I read your post and purchased the HA-RX900 cans. I then did the mod only I used a product call Murder Mat http://store.murdermat.com/murdermat-mdk-2-sq-ft-speaker-kit/  in place of Dyna mat. Everything else the same. I must say thanks for the great advice and Mod posting. I loved the end results. Such a change in the bass and mids I really love these cans now!!!

post #199 of 205

This thread may be old, but I felt compelled to post about my recent experience with these headphones.


First of all, I've never considered myself an audiophile.   I've always had cheap headphones or speakers, like the Sony MDR-EX700 earbuds, or Logitech X-540 5.1 desktop PC speakers.  On a whim I ordered these headphones after stumbling onto this post.  On their own, they were already produce WAY better sound than I am used to (there is so much detail in my music I never noticed), but after doing just the first few steps (removing the felt ring and the "audio lens") I'm floored.

Coupled with a Fiio E10, I'm rediscovering my music.  

This single post has changed my appreciation for sound and music. I thank TopPop and those who contributed to this thread (although my wallet now hates you all).

I must say, for now I'm really happy with these and am looking forward to delving further into the realm of the audiophile.

post #200 of 205

If I don't plan on dynamat or acoustic stuffing, do you still recommend doing steps #1 and #2?

post #201 of 205

I actually only did step 1 and 2, and have not put acoustic stuffing or dynamat into my headphones yet. Simply removing the felt ring and the "acoustic" lens made a huge difference.  I will be adding Dynamat this weekend however when I have a chance to pick some up.

post #202 of 205
Quote:
Originally Posted by Yarbo View Post

I actually only did step 1 and 2, and have not put acoustic stuffing or dynamat into my headphones yet. Simply removing the felt ring and the "acoustic" lens made a huge difference.  I will be adding Dynamat this weekend however when I have a chance to pick some up.

You're supposed to put the "acoustic" lens back after removing the felt ring!  "Screw the acoustic lens back on."

post #203 of 205

Reading through the thread, I found that a few people discussed the audio lens at some length, and they thought that the audio lens is actually the felt ring.  I don't know either way, but testing with and without the plastic "audio lens" as per the directions made little to no difference.    I'm not expert, and probably didn't do a proper test but to me I couldn't really tell.

On another note, later today I am heading to a local store to buy some Dynamat, and I'll post again after I've had a chance to try the last few steps in TopPop's instructions.

post #204 of 205

Completed the mod, totally worth it.  Completed all of the optional steps, and with Dynamat Extreme, it's not too heavy to wear to extended periods of time.

post #205 of 205

I bought a pair of RX900s a couple weeks ago and just got around to doing these mods. The D2000s are my favorite headphones to date but these are a close second, only because the D2000s sub-bass is smoother and deeper. But these are kinda ridiculous for $60.

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Head-Fi.org › Forums › Equipment Forums › Headphones (full-size) › JVC HA-RX900 modifications, a picture tutorial. (56k, forget about it...)