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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
mahgister's avatar
mahgister OP
13,094 posts
 
An interesting experiment:

I now had 6 Schuman Generator (2 power supply+4usb one) in my room… At each times there is an incremental improvement in the soundstage and imaging of the speakers and the headphone alike...If I switch them all off, there is a collapse of the soundstage and imaging, not only in the speakers but more surprisingly in the headphone too...



geoffkait's avatar
geoffkait
23,365 posts
 
“...not only in the speakers but more surprisingly in the headphone too...”

>>>>What do you think that means?
mahgister's avatar
mahgister OP
13,094 posts
 
The S.G. in my system are connected to my stones grid and if I disconnected all that the soundstage collapse, the imaging is less precise, the bubble in which each instrument lives is no more organically connected to the totality...

I think that it is an interaction between the E.M. field of the S.G. and my gear...The stones act also like some kind of filter ,if I change the stones I change the sound for better or worse...But you are the scientist I will wait for your explanation... My best to you Geoff...
geoffkait's avatar
geoffkait
23,365 posts
 
The reason I asked the question was you intimated it was more mysterious or surprising that the effect was observed through headphones than through speakers.

Be that as it may, I do not think that extremely low frequency 7.83 Hz waves are capable of interfering with RF with frequencies in high Megahertz and low Gigahertz. In fact, I am very unyielding on that point. For example, in satellite communications the uplink is 100% protected from interference by the downlink by simply offsetting the two frequencies by a few Gigahertz, 12GHz up, 10 GHz down. Thus, in my humble (?) opinion the SG mode of operational remains a complete mystery.

Cheers, Geoff 🤡
mahgister's avatar
mahgister OP
13,094 posts
 
Thanks Geoff for your insightful remarks...

A complete mystery if you said so, it is... But Perhaps the frequency pulsed by the S.G. act like a kind of transporting wave for some resonant frequencies of my stones affecting the electro-magnetics field intersecting in my room... Dont kill my speculative ignorance with too much sarcasms please... :)


One thing is for sure, like Helmholtz resonators, vibrations controls methods, acoustic room treatment, the S.G.  are an indispensable audio tools for me coupled to my stones grid...In a few years in a new room I will begin anew with better knowledge now and improved connections in my new grid...
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