2. misc-audio
  3. 150390-100071

Miracles in Audio, by luck, by good choices,by design or by tweaking...

I owned a low cost headphone for many years, the Fostex TH7B, first version( a new one close version exist Fostex TH7BK), semi-open headphone...I was never completely satisfied by any headphones I ever owned: Hifiman 400, Stax basic lamda, Stax 5 gold,Akg 340,Akg 701, beyerdynamic 990, and T150... Because in each of them with all their qualities I never listen to at the same times, a confortable headphone with natural timbre and voicing, with a good imaging and a realistic soundstage(not too close to my ears)...


For the last days I tweaked this Fostex, to damp his internal resonance I used sorbothane, I put some shungite stones at the exterior part of the cups and I use some Herkimer diamond in the interior pads( 3 at 120 degree) … Now this low cost headphones crush all my others if I sum all his qualities... For example his mids and voicing cannot beat the AKG 340 but among all my other headphones it is the best that is near that mids and it is more confortable, and with longer cable than the 340...His imaging is better and more realistic than the 340 etc etc...It is the same if I compare with the others...


His most important qualities is natural timbre and clear imaging,very precise pinned point accuracy and natural, so clear it crush for that ALL the others to dust...In the French audio circle the reviews were more than very positive few years ago...Diapason d’or and choc Classica...I am not the only one impressed buy the ratio quality/price... But remember that thesae reviewers dont tweak their headphone...The difference between before and after the tweaks are staggering...


Yes Miracles happens in Audio: cost is under 100 American dollars... Few years ago they cost me 50 bucks new... I never dreamed that I will go back to headphones...


I will enjoy your miracles stories of any kind ….My best to all...
128x128mahgister
whostolethebatmobile
290 posts
 
Yes graphene is an excellent rf shield. And the best on a per weight basis. Although weight may be important in the semiconductor industry, in audio the fact that graphene is one atom thick is neither here nor there (in shielding applications), which is why shungite and carbon black etc. can do more effective shielding on a per dollar basis. I use shungite instead of graphene for that reason (and a few other reasons).
What I would like to know is - what happens to the shielded energy after it hits the graphene or shungite?
thecarpathian's avatar
thecarpathian
4,441 posts
 
Two things happen, it gets reflected to wherever depending on the angle it struck it at, and a bit gets absorbed and dissipates as heat. That's why most shielding also has a heat sink capacity.
thecarpathian's avatar
thecarpathian
4,441 posts
 
Wonder why component chassis' aren't sprayed with a coat of carbon fiber....
whostolethebatmobile
290 posts
 
Excellent answer thecarpathian, thank you very much. I was wondering if any was reflected, or all is absorbed. It explains why effective rf shielding (including my most effective CrystalTops and some audio cables) also include a draining mechanism.
thecarpathian's avatar
thecarpathian
4,441 posts
 
Don't forget, these are not to be confused with rfi/emi absorbers....
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